CN204061484U - A kind of pretightening force fastening piece - Google Patents
A kind of pretightening force fastening piece Download PDFInfo
- Publication number
- CN204061484U CN204061484U CN201420453347.7U CN201420453347U CN204061484U CN 204061484 U CN204061484 U CN 204061484U CN 201420453347 U CN201420453347 U CN 201420453347U CN 204061484 U CN204061484 U CN 204061484U
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- CN
- China
- Prior art keywords
- pretightening force
- pushing tow
- hole
- positioning
- fastening piece
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of pretightening force fastening piece, can be used for any place needing to use fastening piece.Comprise pretightening force nut body, the pushing tow bolt of band positioning through hole, super hard gasket and positioning wire to combine.Pushing tow bolt with positioning through hole penetrates in pretightening force nut body by the pushing tow bolt hole in pretightening force nut body, super hard gasket is placed again in pretightening force nut bottom, and with the positioning through hole of positioning wire through pushing tow bolt, the pushing tow on pretightening force nut is bolted together.Manual torque wrench can be used, mechanical advantage is obvious, stress relief function is accurate, easy and simple to handle, high temperature and dynamic load can be adapted to, and effectively can improve the pretightening force fastening piece of the Security of equipment fastening system.
Description
Technical field
The utility model belongs to fastener areas, is specifically related to a kind of pretightening force fastening piece and comprises nuts and bolt, can be used for any place needing to use fastening piece.
Background technique
Traditional closure system is when mounted except common wrench, also need to use the instruments such as hammering, heating, hydraulic elongator, crane, hydraulic spanner, but the moment of torsion of above-mentioned instrument to designing requirement is uncontrollable, the excessive or pretightening force of pretightening force may be caused not reach design load thus cause device security hidden danger; In actual production, often need several days time during some large scale fastening pieces of installing/dismounting, waste time and energy, screw rod also may be made to be subject to axially damage or metal bonding phenomenon occurs; The position having the temperature difference can make the loosening pretightening force that causes of whole fastening system decline thus bring potential safety hazard because of expanding with heat and contract with cold of screw rod; Actual use in may cause security incident as found that tightening nut and screw flight metal bond with regard to the cutting of getting angry of needs scene when disassembled; Fastening piece is there is and loosens even fracture and make and form major accident in equipment under having shock conditions (as compressor, pump etc.).
Model utility content
The utility model is exactly provide one can use manual torque wrench to solve above-mentioned problems of the prior art, mechanical advantage is obvious, stress relief function is accurate, easy and simple to handle, can adapt to high temperature and dynamic load, and effectively can improve the pretightening force fastening piece of the Security of equipment fastening system.The purpose of this utility model is achieved through the following technical solutions:
A kind of pretightening force fastening piece, comprises pretightening force nut body, the pushing tow bolt of band positioning through hole, super hard gasket and positioning wire and combines.Pushing tow bolt with positioning through hole penetrates in pretightening force nut body by the pushing tow bolt hole in pretightening force nut body, super hard gasket is placed again in pretightening force nut bottom, and with the positioning through hole of positioning wire through pushing tow bolt, the pushing tow on pretightening force nut is bolted together.
Described pretightening force nut body is toroidal, and inner circle is with helical thread.
Described pushing tow bolt hole is arranged in the middle of the inside and outside circle of pretightening force nut body, for the center of circle with the inside and outside round central position of pretightening force nut body, the quantity of pushing tow bolt hole is determined according to the size of pretightening force nut and usage requirement, and is evenly distributed on the annulus of pretightening force nut body.
Described pushing tow bolt is the single ended bolt of special thread, and quantity is corresponding with the bolt hole in pretightening force nut body.
Described positioning through hole is arranged in the nut of pushing tow bolt.
Described super hard gasket is arranged on the below of pretightening force nut body, being provided with hole corresponding to the pushing tow bolt hole of pretightening force nut in pad.
Described positioning wire is through in the positioning through hole on pushing tow bolt nut, and the size of steel wire will ensure that steel wire can pass through positioning through hole.
Compared with prior art, the utility model has following beneficial effect:
1, the pushing tow diameter of bolt of pretightening force fastening piece is very little, need moment little, hand-operated tools is used just can easily to complete fastening, installation method is easy, quick, laborsaving, abandon the traditional approachs such as hydraulic spanner, hydraulic tensioning, electric heating completely, namely realize higher pretightening force by less moment of torsion.
2, the pretightening force of pretightening force bolt is directly proportional with the quantity of its pushing tow bolt and diameter, little through the error calculating the bolt pretightening designed, and can ensure that bolted system is stable, lasting, reliable.
3, pretightening force nut can increase the elasticity of bolted system, the elasticity of increase not only can extend bolt be connected to temperature alternating condition on a large scale under working life, and play the effect preventing from loosening.
4, pretightening force nut has stress relief function, and the pretightening force that pushing tow bolt and kingbolt produce interacts, and creates bending moment, and on pretightening force nut, bending moment is rendered as circumferential, and the stress produced on pretightening force nut is thus peripheral stress.Peripheral stress makes pretightening force nut base diameter increase, and upper diameter reduces.This striction phenomenon serves that release stress is concentrated, improved static load, prevent thread biting locking (metal adhesion), effect that each pitch thread bearing load is identical.
5, pretightening force bolt is under the hot alternation of equipment or dynamic loading conditions, after fastening by the moment of torsion that design is given, its this cognition produces distortion, this distortion is a kind of storage of energy concerning connecting, similar use adds long bolt, and to improve bolt elasticity the same, due to temperature variation or the extra load owing to using different thermal expansion coefficient material to produce when it can absorb intensification.Pretightening force bolt makes bolt connection have this function equally when not increasing spiro rod length, use bolt can be equivalent to increase the effective length of 2-4 bolt.
Accompanying drawing explanation
Fig. 1 is the side-looking structural drawing of a kind of pretightening force fastening piece of the utility model
Fig. 2 is the plan structure figure of a kind of pretightening force fastening piece of the utility model
Fig. 3 is the nut body plan view of a kind of pretightening force fastening piece of the utility model
Fig. 4 is nut body A-A ' the face sectional drawing of a kind of pretightening force fastening piece of the utility model
Fig. 5 is the pushing tow bolt schematic diagram of a kind of pretightening force fastening piece of the utility model
Fig. 6 is the hard gasket schematic diagram of a kind of pretightening force fastening piece of the utility model
Fig. 7 is the positioning wire schematic diagram of a kind of pretightening force fastening piece of the utility model
Wherein:
1-pretightening force nut body 2-pushing tow bolt 3-hard gasket 4-positioning wire
5-positioning through hole 6-pushing tow bolt hole 7-internal thread
Embodiment
The utility model is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1-2: a kind of pretightening force fastening piece, comprise pretightening force nut body 1, be with the pushing tow bolt 2 of positioning through hole 5, super hard gasket 3 and positioning wire 4 to combine.Pushing tow bolt 2 with positioning through hole 5 penetrates in pretightening force nut body by the pushing tow bolt hole 6 in pretightening force nut body 1, super hard gasket 3 is placed again bottom pretightening force nut body 1, and with the positioning through hole 5 of positioning wire 4 through pushing tow bolt, the pushing tow on pretightening force nut is bolted together.
Embodiment one
As shown in figures 1 to 6, a kind of pretightening force fastening piece in the present embodiment, comprises pretightening force nut body 1, is with the pushing tow bolt 2 of positioning through hole 5, super hard gasket 3 and positioning wire 4 to combine.Pushing tow bolt 2 with positioning through hole 5 penetrates in pretightening force nut body by the pushing tow bolt hole 6 in pretightening force nut body 1, super hard gasket 3 is placed again bottom pretightening force nut body 1, and pass the positioning through hole 5 of pushing tow bolt as shown in Figure 2 with positioning wire 4, the pushing tow on pretightening force nut is bolted together.
Pretightening force nut body 1 is toroidal, and inner circle is with spirality internal thread 7.Pushing tow bolt hole 6 is arranged in the middle of the inside and outside circle of pretightening force nut body as shown in Figure 3, for the center of circle with the inside and outside round central position of pretightening force nut body, be eight according to the quantity of pushing tow bolt hole 6 in user demand the present embodiment, and be evenly distributed on the annulus of pretightening force nut body.Pushing tow bolt 2 is the single ended bolt of special thread as shown in Figure 5, is 8 according to the quantity of pushing tow bolt in the volume cost embodiment of bolt hole; What the nut of each bolt was arranged has positioning through hole 5, in the positioning through hole 5 be through on pushing tow bolt nut, is fixedly linked by eight pushing tow bolts to facilitate positioning wire 4.
Be only several specific embodiments of the application above, but the application is not limited thereto, the change that any those skilled in the art can think, all should drops in the protection domain of the application.
Claims (7)
1. a pretightening force fastening piece, it is characterized in that pretightening force nut comprises pretightening force nut body, the pushing tow bolt of band positioning through hole, super hard gasket and positioning wire and combines, pushing tow bolt with positioning through hole penetrates in pretightening force nut body by the pushing tow bolt hole in pretightening force nut body, super hard gasket is placed again in pretightening force nut bottom, and with the positioning through hole of positioning wire through pushing tow bolt, the pushing tow on pretightening force nut is bolted together.
2. a kind of pretightening force fastening piece as claimed in claim 1, is characterized in that: described pretightening force nut body is toroidal, and inner circle is with helical thread.
3. a kind of pretightening force fastening piece as claimed in claim 1, it is characterized in that: described pushing tow bolt hole is arranged in the middle of the inside and outside circle of pretightening force nut body, for the center of circle with the inside and outside round central position of pretightening force nut body, the quantity of pushing tow bolt hole is determined according to the size of pretightening force nut and usage requirement, and is evenly distributed on the annulus of pretightening force nut body.
4. a kind of pretightening force fastening piece as claimed in claim 1, is characterized in that: described pushing tow bolt is the single ended bolt of special thread, and quantity is corresponding with the bolt hole in pretightening force nut body.
5. a kind of pretightening force fastening piece as claimed in claim 1, is characterized in that: described positioning through hole is arranged in the nut of pushing tow bolt.
6. a kind of pretightening force fastening piece as claimed in claim 1, is characterized in that: described super hard gasket is arranged on the below of pretightening force nut body, being provided with hole corresponding to the pushing tow bolt hole of pretightening force nut in pad.
7. a kind of pretightening force fastening piece as claimed in claim 1, is characterized in that: described positioning wire is through in the positioning through hole on pushing tow bolt nut, the size of steel wire will ensure that steel wire can pass through positioning through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453347.7U CN204061484U (en) | 2014-08-11 | 2014-08-11 | A kind of pretightening force fastening piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453347.7U CN204061484U (en) | 2014-08-11 | 2014-08-11 | A kind of pretightening force fastening piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204061484U true CN204061484U (en) | 2014-12-31 |
Family
ID=52203009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420453347.7U Expired - Fee Related CN204061484U (en) | 2014-08-11 | 2014-08-11 | A kind of pretightening force fastening piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204061484U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999867A (en) * | 2018-09-29 | 2018-12-14 | 中国船舶重工集团公司第七0四研究所 | The more pushing tow pre-tightening apparatus of compact |
| CN110509228A (en) * | 2019-09-10 | 2019-11-29 | 云南拓远科技有限公司 | A kind of hydroelectric power plant's servomotor piston rod clamp device and its application method |
-
2014
- 2014-08-11 CN CN201420453347.7U patent/CN204061484U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999867A (en) * | 2018-09-29 | 2018-12-14 | 中国船舶重工集团公司第七0四研究所 | The more pushing tow pre-tightening apparatus of compact |
| CN110509228A (en) * | 2019-09-10 | 2019-11-29 | 云南拓远科技有限公司 | A kind of hydroelectric power plant's servomotor piston rod clamp device and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20150811 |
|
| EXPY | Termination of patent right or utility model |