CN204843473U - Taper nut top pushes away pretension system - Google Patents
Taper nut top pushes away pretension system Download PDFInfo
- Publication number
- CN204843473U CN204843473U CN201420745805.4U CN201420745805U CN204843473U CN 204843473 U CN204843473 U CN 204843473U CN 201420745805 U CN201420745805 U CN 201420745805U CN 204843473 U CN204843473 U CN 204843473U
- Authority
- CN
- China
- Prior art keywords
- pushing tow
- tapered cup
- cup nut
- stove bolt
- nut body
- 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.)
- Withdrawn - After Issue
Links
- 239000000463 material Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000005482 strain hardening Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 9
- 229910000601 superalloy Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model provides a taper nut top pushes away pretension system which characterized in that, taper nut top pushes away pretension system includes that the top of taper nut body (1), circumference equipartition pushes away stove bolt (4) and superhard gasket (5), taper nut body (1) has the outer circular conical surface that a half cone angle is theta, has on the outer circular conical surface most likely a plurality of fins (3), and there are cylindrical thread centre bore (2) run through at taper nut body (1) middle part, and the shank of bolt of these cylindrical thread centre bore (2) and fastener matches. This taper nut top pushes away pretension system has the pretightning force accuracy, simple to operate, and advantages such as economical and practical are particularly suitable for using on the mechanical equipment of high temperature high pressure operating mode and big specification.
Description
Technical field
The utility model relates to a kind of pushing tow pretensioner systems of large gauge, a kind of tapered cup nut pushing tow pretensioner systems be applied in hot environment of specific design.
Background technology
At present, along with the development of modern industry, bolt connection is easy to dismounting with it, cost of manufacture is lower, and does not destroy the advantage of connected piece, is still widely used in the key areas such as Aero-Space, chemical industry equipment.The pretension difficulty of large gauge bolt is large, pretightning force is difficult to control, thread root stress is concentrated, thread looseness and deadlock phenomenon serious, under high temperature and high pressure condition, bolted stress relaxation phenomenon all becomes a bolted difficult problem all the time.
Summary of the invention
Connect Problems existing for bolt under existing major diameter, high temperature and high pressure condition, the utility model provides a kind of tapered cup nut pushing tow pretensioner systems.This system is applicable to high temperature and high pressure environment, and pretightning force is accurate, safe and reliable, saves the fastening time.
The utility model is solve the problems of the technologies described above the technical scheme adopted to be:
A kind of tapered cup nut pushing tow pretensioner systems, described tapered cup nut pushing tow pretensioner systems comprises tapered cup nut body 1, the uniform pushing tow stove bolt 4 of circumference and superhard pad 5, it is the outer conical surface of θ that described tapered cup nut body 1 has a semi-cone angle, this outer conical surface there are some fins 3, have the cylindrical thread centre bore 2 run through in the middle part of tapered cup nut body 1, this cylindrical thread centre bore 2 matches with the shank of bolt of securing member.Described cylindrical thread centre bore 2 surrounding is uniform some stove bolt holes 7 ringwise, and the number in described stove bolt hole 7 is different along with the change of tapered cup nut body 1 diameter dimension.Pushing tow stove bolt 4 is arranged in this stove bolt hole 7; Have circular hole 6 in the middle part of described superhard pad 5, described circular hole 6 is corresponding with cylindrical thread centre bore 2 to be arranged.
Described tapered cup nut body 1 has the outer conical surface that a semi-cone angle θ is 1 degree-10 degree, this outer conical surface has 2-8 fin 3.
Described pushing tow stove bolt 4 is made up of polished rod section three part bottom hexagon-head, thread segment and band sphere.
The hexagon-head of described pushing tow stove bolt 4 adopts cold working, cold forming, and thread segment adopts undergauge, side set or cutting processing, abuts against bottom the sphere of the polished rod section of pushing tow stove bolt 4 with superhard pad 5.
The number of described pushing tow stove bolt 4 is different according to the change of tapered cup nut body 1 diameter dimension, and is evenly distributed in the surrounding of cylindrical thread centre bore 2 ringwise.
The material hardness of tapered cup nut body 1 will lower than the hardness of pushing tow stove bolt 4.
The material of tapered cup nut pushing tow pretensioner systems described in this adopts high-strength high-temperature superalloy, is specially adapted to hot environment.
Described superhard pad is the carbide alloy pad with high strength and high-wearing feature, long service life.Have circular hole in the middle part of described pad, described circular hole is corresponding with cylindrical thread centre bore to be arranged.
The material hardness of described tapered cup nut body lower than pushing tow stove bolt, will be dismantled even if lubricate bad also can being easy to like this.
The advantage of the tapered cup nut pushing tow pretensioner systems that the utility model provides is:
1, tapered cup nut pushing tow pretensioner systems of the present utility model adopts high-strength high temperature-resistant superalloy, has good elasticity, can compensate the unstability of the connection caused due to high temperature and variations in temperature, be specially adapted to hot environment.
2, the tapered cup nut body of tapered cup nut pushing tow pretensioner systems of the present utility model has a semi-cone angle is the outer conical surface of θ, the screw thread stress of the bolt coordinated with it effectively can be reduced after this system is fastening, make stress distribution more even, pretension is more solid and reliable, decreases the fracture of shank of bolt.Uniform some fins in outer conical surface, as long as manually just tapered cup nut can be connected with screw rod during installation, time saving and energy saving simultaneously.
3, the pushing tow stove bolt thread segment of tapered cup nut pushing tow pretensioner systems of the present utility model adopts the processing such as undergauge, side set or cutting, decrease coefficient of friction, load is more uniformly distributed on screw thread, the demand to moment of torsion when it reducing installation, dismounting of being more convenient for.The screw thread that precision rollers goes out makes installing/dismounting become very smooth and easy.
Coefficient of friction is reduced, mark hardly on superhard pad bottom the sphere of 4, the pushing tow stove bolt of tapered cup nut pushing tow pretensioner systems of the present utility model.Reduce installation required torque, be more convenient to dismounting.
5, the pushing tow stove bolt of tapered cup nut pushing tow pretensioner systems of the present utility model adopts hexagonal (hexagon)nut, cold working, cold forming, contributes to reducing moment of torsion, easy for installation.This bolt belongs to simple machine components, and life cycle is of a specified duration, reusable, economical and practical.
6, the hardness of the tapered cup nut body material therefor of tapered cup nut pushing tow pretensioner systems of the present utility model is lower than pushing tow stove bolt, like this when threaded engagement, badly also easily to dismantle even if lubricate.
7, the tapered cup nut pushing tow pretensioner systems of tapered cup nut pushing tow pretensioner systems of the present utility model belongs to simple machine components, and life cycle is of a specified duration, reusable, economical and practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the top view of the tapered cup nut body of the tapered cup nut pushing tow pretensioner systems shown in Fig. 1:
Each parts mark in accompanying drawing is as follows: 1, tapered cup nut body, and 2, cylindrical thread centre bore, 3, fin, 4, pushing tow stove bolt, 5, superhard pad, 6, circular hole, 7, stove bolt hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is elaborated, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus makes more explicit defining to protection domain of the present utility model.
As shown in Figure 1, Figure 2, a kind of tapered cup nut pushing tow pretensioner systems, described tapered cup nut pushing tow pretensioner systems comprises tapered cup nut body 1, the uniform pushing tow stove bolt 4 of circumference and superhard pad 5, it is the outer conical surface of θ that described tapered cup nut body 1 has a semi-cone angle, in embodiment, θ is 3 degree, this outer conical surface has some fins 3, have the cylindrical thread centre bore 2 run through in the middle part of tapered cup nut body 1, this cylindrical thread centre bore 2 matches with the shank of bolt of securing member.Described cylindrical thread centre bore 2 surrounding is uniform some stove bolt holes 7 ringwise, and the number in described stove bolt hole 7 is different along with the change of tapered cup nut body 1 diameter dimension.Pushing tow stove bolt 4 is arranged in this stove bolt hole 7; Have circular hole 6 in the middle part of described superhard pad 5, described circular hole 6 is corresponding with cylindrical thread centre bore 2 to be arranged.
Described tapered cup nut body 1 has the outer conical surface that a semi-cone angle θ is 1 degree-10 degree, this outer conical surface has 2-8 fin 3.
Described pushing tow stove bolt 4 is made up of polished rod section three part bottom hexagon-head, thread segment and band sphere.
The hexagon-head of described pushing tow stove bolt 4 adopts cold working, cold forming, and thread segment adopts undergauge, side set or cutting processing, abuts against bottom the sphere of the polished rod section of pushing tow stove bolt 4 with superhard pad 5.
The number of described pushing tow stove bolt 4 is different according to the change of tapered cup nut body 1 diameter dimension, and is evenly distributed in the surrounding of cylindrical thread centre bore 2 ringwise.
The material hardness of tapered cup nut body 1 will lower than the hardness of pushing tow stove bolt 4.
The material of tapered cup nut pushing tow pretensioner systems described in this adopts high-strength high-temperature superalloy, is specially adapted to hot environment.
During use, superhard pad 5 is inserted in the screw rod of securing member, then tapered cup nut body 1 is backed out along screw rod main thread hand propelled fin 3, touch superhard pad 5, then manually pushing tow stove bolt 4 is tightened by right-angled intersection method of tightening step by step by measuring spanner for force moment, can complete installation.Moment required during installation pushing tow stove bolt 4 is little, but quantity is many, and can form one powerful thrust on superhard pad 5, this thrust makes connector tighten together with the reaction force that the screw rod of securing member produces.Simultaneously due to the pliability of tapered cup nut body 1, nut body top is slightly inwardly shunk, and bottom expand outwardly slightly.This distortion is very little, but can by the stress equilibrium concentrated on former roads screw thread ground threadingly release come, substantially increase load capacity and fatigue resistance.
It is the outer conical surface of θ that tapered cup nut body 1 has a semi-cone angle, and this structure can reduce screw thread stress further effectively.After this tapered cup nut pushing tow pretensioner systems installation, because outer conical surface, resistance ratios barrel nut suffered when the bottom of tapered cup nut body 1 is expanded outwardly is little, causes deflection to increase, and discharges more screw thread stress.For a preferred embodiment, first screw thread stress reduction 52% compared with this tapered cup nut pushing tow pretensioner systems connects with plain bolt, the stress equilibrium distribution on former roads screw thread.The first screw thread that maximum stress is connected by plain bolt is transferred on the 10th one screw thread, and maximum screw thread stress reduces 43.5%.Make connection more reliably fastening, effectively reduce the fracture of screw rod.Meanwhile, the outer conical surface of tapered cup nut body 1 there are some fins 5, rotate fin during installation by hand and nut body 1 can be screwed in screw rod, without any need for instrument, install simple, time saving and energy saving.
Pushing tow stove bolt 4 is divided into polished rod section three part bottom hexagon-head, thread segment and band sphere.Thread segment adopts the processing such as undergauge, side set or cutting, can reduce coefficient of friction, reduces the stress of screw thread, the demand to moment of torsion when reducing installation, dismounting of being more convenient for.Meanwhile, bottom the sphere of pushing tow stove bolt 4 polished rod section, also reduce coefficient of friction, mark hardly on superhard pad 5, the effect reducing and install required torque can be played equally.The hexagon-head of pushing tow stove bolt 4 adopts cold working, cold forming, contributes to reducing moment of torsion, and is easy to installing/dismounting.
Described tapered cup nut pushing tow pretensioner systems adopts high-strength high temperature-resistant alloy, has good elasticity, bolted stress relaxation phenomenon under can effectively reducing hot environment.Simultaneously the hardness of tapered cup nut body material therefor is lower than pushing tow stove bolt, like this when threaded engagement, badly also easily to dismantle even if lubricate.
Should be understood that; the foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a tapered cup nut pushing tow pretensioner systems, it is characterized in that, described tapered cup nut pushing tow pretensioner systems comprises tapered cup nut body (1), the uniform pushing tow stove bolt (4) of circumference and superhard pad (5), it is the outer conical surface of θ that described tapered cup nut body (1) has a semi-cone angle, this outer conical surface there are some fins (3), there is the cylindrical thread centre bore (2) run through at tapered cup nut body (1) middle part, and this cylindrical thread centre bore (2) matches with the shank of bolt of securing member; Described cylindrical thread centre bore (2) surrounding is uniform some stove bolt holes (7) ringwise, and the number of described stove bolt hole (7) is different along with the change of tapered cup nut body (1) diameter dimension; Pushing tow stove bolt (4) is arranged in this stove bolt hole (7); Described superhard pad (5) middle part has circular hole (6), and described circular hole (6) is corresponding with cylindrical thread centre bore (2) to be arranged.
2. a kind of tapered cup nut pushing tow pretensioner systems according to claim 1, is characterized in that: described tapered cup nut body (1) has the outer conical surface that a semi-cone angle θ is 1 degree-10 degree, this outer conical surface has 2-8 fin (3).
3. a kind of tapered cup nut pushing tow pretensioner systems according to claim 1, is characterized in that: described pushing tow stove bolt (4) is made up of polished rod section three part bottom hexagon-head, thread segment and band sphere.
4. a kind of tapered cup nut pushing tow pretensioner systems according to claim 1, it is characterized in that: the hexagon-head of described pushing tow stove bolt (4) adopts cold working, cold forming, thread segment adopts undergauge, side set or cutting processing, abuts against bottom the sphere of the polished rod section of pushing tow stove bolt (4) with superhard pad (5).
5. a kind of tapered cup nut pushing tow pretensioner systems according to claim 1, it is characterized in that: the number of described pushing tow stove bolt (4) is different according to the change of tapered cup nut body (1) diameter dimension, and is evenly distributed in the surrounding of cylindrical thread centre bore (2) ringwise.
6. a kind of tapered cup nut pushing tow pretensioner systems according to claim 1, is characterized in that: the material hardness of tapered cup nut body (1) will lower than the hardness of pushing tow stove bolt (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745805.4U CN204843473U (en) | 2014-12-01 | 2014-12-01 | Taper nut top pushes away pretension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420745805.4U CN204843473U (en) | 2014-12-01 | 2014-12-01 | Taper nut top pushes away pretension system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204843473U true CN204843473U (en) | 2015-12-09 |
Family
ID=54734070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420745805.4U Withdrawn - After Issue CN204843473U (en) | 2014-12-01 | 2014-12-01 | Taper nut top pushes away pretension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204843473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384916A (en) * | 2014-12-01 | 2015-03-04 | 南京工业大学 | conical nut pushing and pre-tightening system |
-
2014
- 2014-12-01 CN CN201420745805.4U patent/CN204843473U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384916A (en) * | 2014-12-01 | 2015-03-04 | 南京工业大学 | conical nut pushing and pre-tightening system |
| CN104384916B (en) * | 2014-12-01 | 2017-05-31 | 南京工业大学 | A kind of tapered cup nut pushing tow pretensioner systems |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20170531 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20170531 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |