CN113217522A - Double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and mounting method thereof - Google Patents
Double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and mounting method thereof Download PDFInfo
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- CN113217522A CN113217522A CN202110669576.7A CN202110669576A CN113217522A CN 113217522 A CN113217522 A CN 113217522A CN 202110669576 A CN202110669576 A CN 202110669576A CN 113217522 A CN113217522 A CN 113217522A
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- nut
- wedged
- loosening
- bolt
- washer
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002045 lasting effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- 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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- 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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and an installation method thereof. The bolt rod of the high-strength bolt penetrates through the connected piece and then sequentially comprises an inner nut, a wedged anti-loosening gasket and an outer nut from inside to outside, wherein the wedged anti-loosening gasket is tightly jacked by the inner nut and the outer nut and is embedded into contact surfaces of the wedged anti-loosening gasket and the inner nut and the outer nut. The anti-loosening bolt connecting structure effectively prevents the relative rotation of the double nuts, and effectively reduces the loss of pre-tightening force when the structure bears the effects of vibration, impact, tension and the like, so that a lasting and effective anti-loosening effect is achieved.
Description
Technical Field
The invention belongs to the field of fastener connection, and particularly relates to a double-nut and wedged anti-loose washer combined anti-loose bolt connection structure and an installation method thereof.
Background
The bolt connecting structure has the advantages of simple installation, convenient disassembly, low cost, high interchangeability and the like, and is widely applied to various industries in the industrial field. However, during the use of the bolt connection structure, due to vibration, impact, temperature change or other reasons, the applied pretightening force is gradually reduced or even disappears along with the increase of the use time, so that the bolt connection structure is loosened. Meanwhile, some bolt connecting structures are inevitably under the action of tensile force. For example, chinese patent publication No. CN 111894145 a, published as 2020, 11/6/discloses a double-section high-strength bolt anti-loosening connecting node for a space grid structure and a construction method thereof. It can be seen from the content of the patent that when the structure is under tension, the lock washer may be disengaged from the rod end connector, and the pretightening force applied between the lock washer and the connected member by rotating the nut may be reduced or even eliminated due to the tension applied by the bolt, resulting in poor or even failure of the lock effect. The failure and damage of the bolt connection structure can generate immeasurable property and life loss, so the anti-loosening design of the bolt connection is particularly important.
Disclosure of Invention
The invention aims to effectively solve the anti-loosening problem of bolt connection and ensure that a bolt and a connected piece are connected firmly and reliably, and provides a double-nut and wedged anti-loosening washer combined anti-loosening bolt connection structure and an installation method thereof.
The technical scheme of the invention is as follows:
a combined anti-loosening bolt connecting structure of double nuts and wedged anti-loosening gaskets and an installation method thereof comprise a high-strength bolt, the wedged anti-loosening gaskets, an inner nut, an outer nut and a connected piece, wherein the wedged anti-loosening gaskets are tightly jacked by the inner nut and the outer nut. The wedge-in type anti-loosening gasket consists of two identical gaskets, a round hole is formed in the middle of each gasket, each gasket is provided with different sawteeth, one surface of each gasket is provided with large cam-shaped teeth, and the other surface of each gasket is provided with small dense teeth; the cam-shaped large tooth surface of the wedged anti-loose washer is opposite, the small tooth surface is respectively tightly propped against the inner nut and the outer nut, and the small tooth is embedded into the contact surfaces of the small tooth surface and the inner nut and the outer nut; the inner nut, the wedged anti-loose washer and the connected piece are tightly propped, and required torque is applied, wherein small teeth of the wedged anti-loose washer are embedded into a contact surface of the wedged anti-loose washer and the inner nut; the outer nut and the wedged anti-loose washer are tightly propped, and required torque is applied, wherein small teeth of the wedged anti-loose washer are embedded into a contact surface of the wedged anti-loose washer and the outer nut.
Construction and installation steps:
(1) firstly, a bolt rod of a high-strength bolt penetrates through a hole formed in a connected piece;
(2) then screwing the inner nut into a bolt rod of the high-strength bolt, and applying required torque until the inner nut is tightly propped against a connected piece;
(3) then the wedged anti-loosening washer passes through a bolt rod of the high-strength bolt to be contacted with the inner nut, wherein the cam-shaped large tooth surfaces of the two wedged anti-loosening washers are opposite;
(4) finally, the outer nut is screwed into the bolt rod of the high-strength bolt to be contacted with the wedged anti-loosening washer, required torque is applied until the outer nut, the wedged anti-loosening washer, the inner nut and the connected piece are mutually propped, and at the moment, the small teeth of the wedged anti-loosening washer are respectively embedded into the contact surfaces of the inner nut and the outer nut to complete installation.
The key concept of the technical scheme is as follows:
the cam-shaped large tooth surface of the wedged anti-loose washer is opposite, the small tooth surface is respectively tightly propped against the inner nut and the outer nut, and the small tooth is respectively embedded into the contact surfaces of the small tooth surface and the inner nut and the outer nut. On one hand, the friction force between the wedged anti-loose washer and the inner nut and the outer nut is increased, and simultaneously, the resistance force when the inner nut and the outer nut rotate is effectively increased due to the embedding of the small teeth; on the other hand, the tension anti-loosening principle of the wedge-in anti-loosening washer can be fully utilized. When the anti-loosening connecting structure provided by the invention bears the effects of vibration, impact and the like, the opposite jacking force between the double nuts can be increased by the relative rotation of the wedged anti-loosening gasket, the friction force between the small tooth surface and the double nuts can be increased, and meanwhile, the double nuts are not easy to rotate relatively due to the embedding of the small teeth. When the structure bears the tension effect to do all can, high strength bolt and by the contact part of connecting piece pulled open more easily, and wedge-in type lock washer is by two nut top tightly, so exert the pretightning force loss of wedging type lock washer department very little, the locking effect of structure also can fully guarantee.
The invention has the beneficial effects that:
when the combined anti-loosening bolt connecting structure of the double nuts and the wedged anti-loosening gasket provided by the invention bears the effects of vibration, impact, even tensile force and the like, the loss of pretightening force applied to the wedged anti-loosening gasket is very small, and because of the tension anti-loosening principle of the wedged anti-loosening gasket, a certain opposite jacking force is always existed between the double nuts, and simultaneously, the small teeth are respectively embedded into the contact surfaces of the double nuts and the inner and outer nuts, so that the relative rotation between the double nuts can be effectively prevented, and the relative rotation between the double nuts and the high-strength bolt can be prevented. Therefore, the combined anti-loosening bolt connecting structure with the double nuts and the wedged anti-loosening washer has the advantages of simple structure, convenience in use, effective and reliable anti-loosening effect and the like.
Drawings
FIG. 1 is a schematic view of a double nut and wedged lock washer combined anti-loosening bolt connection;
wherein 1 is high-strength bolt, 2 is external nut, 3 is wedged anti-loose washer, 4 is internal nut, 5 is connected piece
FIG. 2 is a test mounting torque meter
Fig. 3 is a table of results of bolt residual clamping force/initial clamping force tests.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and the detailed description.
Fig. 1 is a schematic view of a double nut and wedged anti-loose washer combined anti-loose bolt connection structure, wherein 1 is a high-strength bolt, 2 is an outer nut, 3 is a wedged anti-loose washer, 4 is an inner nut, and 5 is a connected piece.
The installation steps of the invention are as follows:
(1) firstly, a bolt rod of a high-strength bolt 1 penetrates through a hole formed in a connected piece 5;
(2) then screwing the inner nut 4 into the bolt rod of the high-strength bolt 1, and applying required torque until the inner nut is tightly pressed against the connected piece 5;
(3) then the wedged anti-loose washer 3 is contacted with the inner nut 4 through the bolt of the high-strength bolt 1, wherein the cam-shaped large tooth surfaces of the two wedged anti-loose washers are opposite;
(4) finally, the external nut 2 is screwed into the bolt rod of the high-strength bolt 1 to be contacted with the wedged anti-loose washer 3, and required torque is applied until the external nut 2, the wedged anti-loose washer 3, the internal nut 4 and the connected piece 5 are mutually propped, and at the moment, small teeth of the wedged anti-loose washer 3 are respectively embedded into contact surfaces of the inner nut 4 and the external nut 2, so that the installation is finished (as shown in figure 1).
The wedged anti-loose washer is tightly propped against the inner nut and the outer nut, and the small teeth are respectively embedded into the contact surfaces of the wedged anti-loose washer and the inner nut and the contact surfaces of the wedged anti-loose washer and the outer nut, so that the loss of pretightening force of the structure under the actions of bearing vibration, impact, tension and the like is effectively reduced, the relative rotation of the two nuts is effectively prevented, and a durable and effective anti-loose effect is achieved.
The above description is only an exemplary embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.
As shown in fig. 2 to fig. 3, in order to further verify the anti-loosening performance of the combined anti-loosening bolt connecting structure with the double nut and the wedged anti-loosening washer, and compare the anti-loosening performance with the connection mode of the traditional double nut, a transverse vibration test is performed according to GB/T10431 + 2008 transverse vibration test method for fasteners, and a transverse vibration testing machine for fasteners is adopted for the test. The nuts are all 10-grade M20 standard nuts (GB/T6170-2015 type 1 hexagon nuts), and the bolts are all 10.9-grade high-strength bolts. The main vibration test parameters were as follows: test frequency: 12.5Hz, amplitude: ± 1mm, number of vibrations: 4500 times. The results of the residual clamping force/initial clamping force of the bolt obtained by the test are shown in fig. 3, so that the residual clamping force of the combined bolt connection of the double nut and the wedged anti-loose washer is more than 70% of the initial clamping force, and the residual clamping force of the traditional double nut bolt connection is 30% -59% of the initial clamping force. Therefore, compared with the traditional double-nut connection mode, the double-nut and wedged anti-loose washer combined anti-loose bolt connection structure has great advantages, the pretightening force loss is very small, the high-strength bolt can be fastened and connected with the connected piece, and the safety and the stability of the connection structure are guaranteed.
Claims (6)
1. A combined anti-loosening bolt connecting structure of double nuts and wedged anti-loosening gaskets and an installation method thereof comprise a high-strength bolt, the wedged anti-loosening gaskets, an inner nut, an outer nut and a connected piece, wherein the wedged anti-loosening gaskets are tightly jacked by the inner nut and the outer nut.
2. A double nut and wedged lock washer combined anti-loosening bolt connection structure and an installation method thereof according to claim 1, wherein: the wedge-in type anti-loosening gasket is composed of two identical gaskets, a round hole is formed in the middle of each gasket, each gasket is provided with different sawteeth, one surface of each gasket is provided with large cam-shaped teeth, and the other surface of each gasket is provided with small dense teeth.
3. A double nut and wedge type lock washer combined anti-loosening bolt coupling structure and a method of installing the same according to claim 1 or 2, wherein: the cam-shaped large tooth surfaces of the wedged anti-loose washer are opposite, the small tooth surfaces are respectively tightly propped against the inner nut and the outer nut, and the small teeth are embedded into the contact surfaces of the small teeth and the inner nut and the outer nut.
4. A double nut and wedged lock washer combined anti-loosening bolt connection structure and an installation method thereof according to claim 1, wherein: the inner nut and the wedged lock washer are tightly pressed by the connecting piece, and required torque is applied, wherein small teeth of the wedged lock washer are embedded into a contact surface of the wedged lock washer and the inner nut.
5. A double nut and wedged lock washer combined anti-loosening bolt connection structure and an installation method thereof according to claim 1, wherein: the outer nut and the wedged anti-loose washer are tightly propped, and required torque is applied, wherein small teeth of the wedged anti-loose washer are embedded into a contact surface of the wedged anti-loose washer and the outer nut.
6. A double nut and wedged lock washer combined anti-loosening bolt connection structure and an installation method thereof according to claim 1, wherein: the installation of the anti-loosening bolt connecting structure is carried out according to the following steps:
(1) firstly, a bolt rod of a high-strength bolt penetrates through a hole formed in a connected piece;
(2) then screwing the inner nut into a bolt rod of the high-strength bolt, and applying required torque until the inner nut is tightly propped against a connected piece;
(3) then the wedged anti-loosening washer passes through a bolt rod of the high-strength bolt to be contacted with the inner nut, wherein the cam-shaped large tooth surfaces of the two wedged anti-loosening washers are opposite;
(4) finally, the outer nut is screwed into the bolt rod of the high-strength bolt to be contacted with the wedged anti-loosening washer, required torque is applied until the outer nut, the wedged anti-loosening washer, the inner nut and the connected piece are mutually propped, and at the moment, the small teeth of the wedged anti-loosening washer are respectively embedded into the contact surfaces of the inner nut and the outer nut to complete installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669576.7A CN113217522A (en) | 2021-06-17 | 2021-06-17 | Double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669576.7A CN113217522A (en) | 2021-06-17 | 2021-06-17 | Double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and mounting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113217522A true CN113217522A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110669576.7A Withdrawn CN113217522A (en) | 2021-06-17 | 2021-06-17 | Double-nut and wedged anti-loose washer combined anti-loose bolt connecting structure and mounting method thereof |
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| CN (1) | CN113217522A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847073A (en) * | 2024-03-03 | 2024-04-09 | 沈阳晋亿紧固件技术开发有限公司 | High-strength locknut |
-
2021
- 2021-06-17 CN CN202110669576.7A patent/CN113217522A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117847073A (en) * | 2024-03-03 | 2024-04-09 | 沈阳晋亿紧固件技术开发有限公司 | High-strength locknut |
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Application publication date: 20210806 |
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| WW01 | Invention patent application withdrawn after publication |