CN204985246U - High strength tie -rod - Google Patents
High strength tie -rod Download PDFInfo
- Publication number
- CN204985246U CN204985246U CN201520492231.9U CN201520492231U CN204985246U CN 204985246 U CN204985246 U CN 204985246U CN 201520492231 U CN201520492231 U CN 201520492231U CN 204985246 U CN204985246 U CN 204985246U
- Authority
- CN
- China
- Prior art keywords
- bolt
- joint
- truncated cone
- high strength
- described left
- 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.)
- Expired - Fee Related
Links
- 238000013461 design Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model relates to a high strength tie -rod, including the body of bolt, the one end of the body of bolt is provided with left connecting portion, and the other end is provided with right connecting portion, left side connecting portion are the same with right connecting portion diameter and be greater than the diameter of the body of bolt, left side connecting portion and right connecting portion all are equipped with the knuckle with body of bolt junction. The utility model has the advantages of reasonable design, through be equipped with in left connecting portion and right connecting portion and the body of bolt junction knuckle slow down the stress concentration phenomenon, improve do the fatigue performance can, improved the working life of part.
Description
Technical field
The utility model relates to bolt fastener technical field, particularly a kind of high strength through bolt.
Background technique
China is fastening piece big producing country, fastening piece output is No. 1 in the world, but the fastening piece great majority produced at present are low intensive fastening piece, analyze according to " 2014-2018 China's Investment in fastener industry production and marketing requirement forecasting and transition and upgrade analysis report " that prediction industrial research institute issues: there is family more than 10,000 in the enterprise of domestic production fastening piece at present, but produce low intensive enterprise and occupy overall 70%, if we do not improve the technology content of product and reduce costs, it is very fast that we will be replaced by country such as Vietnam or the India that some cost of production are lower, these fastening piece enterprises of that China will face great economic crisis.Further, in the last few years, a lot of overseas enterprise offered subsidiary factory in China inland one after another.Up to the present, the fastening piece enterprise in the U.S., Japan, Britain, India, Germany and Hongkong and Taiwan, one has family more than 200 at emphasis production high strength, high-precision fastening piece, their total output value has reached 25% of domestic Investment in fastener industry, and this will promote and promote the integral level of domestic Investment in fastener industry.But the competition making fastening piece enterprise of China face is also fiercer.
In order to improve the low-quality present situation of domestic high-intensity fasteners high yield, special research and development are used for " 10.9 " level of engine of boat and ship and " 12.9 " grade high-strength fastener.
Model utility content
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of high strength through bolt.
For solving the problem, the utility model provides following technological scheme:
A kind of high strength through bolt, comprise the body of bolt, one end of the described body of bolt is provided with left joint, and the other end is provided with right joint, and described left joint is identical with right joint diameter and be greater than the diameter of the body of bolt; Described left joint and right joint and body of bolt joint are equipped with knuckle.
Further, the diameter of described left joint and right joint is 1.5 ~ 2 times of body of bolt diameter; The side that described left joint and right joint are connected with the body of bolt is equipped with truncated cone joint; Described excessive fillet is arranged at the jointing place of described truncated cone joint and the body of bolt.
Further, the edge of described left joint end is provided with chamfering.
Further, the end of described right joint is connected with shaft shoulder portion by truncated cone joint; Described shaft shoulder portion is provided with knuckle with the jointing place of corresponding truncated cone joint.
Further, described left joint and be equipped with outside thread; Outside thread on described left joint is by the edge of the truncated cone joint of chamfering extension; Outside thread on described right joint is extended to the edge of the truncated cone joint on right side by the edge of the truncated cone joint in left side.
Further, the end of described left link portions is provided with the tapped hole along body of bolt axial direction.
Further, the tensile strength of the described body of bolt: 900-1100N/mm2, yield ratio: more than 0.9.
Further, the tensile strength of the described body of bolt: 1100-1300N/mm2, yield ratio: more than 0.9.
Beneficial effect: a high strength through bolt of the present utility model, reasonable in design, slows down stress concentration phenomenon by being provided with knuckle at left joint and right joint and body of bolt joint, improving and do fatigue behaviour, improve the operating life of part.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the left joint in the utility model;
Fig. 3 is the structural representation of the right joint in the utility model;
Description of reference numerals: the body of bolt 1, left joint 2, right joint 3, truncated cone joint 4, knuckle 5, chamfering 6, tapped hole 7, shaft shoulder portion 8.
Embodiment
Below in conjunction with Figure of description and embodiment, specific embodiment of the utility model is described in further detail:
Referring to figs. 1 through a kind of high strength through bolt shown in Fig. 3, comprise the body of bolt 1, one end of the described body of bolt 1 is provided with left joint 2, and the other end is provided with right joint 3, and described left joint 2 is identical with right joint 3 diameter and be greater than the diameter of the body of bolt 1; Described left joint 2 and right joint 3 are equipped with knuckle 5 with the body of bolt 1 joint.
The diameter of described left joint 2 and right joint 3 is 1.5 ~ 2 times of the body of bolt 1 diameter; The side that described left joint 2 is connected with the body of bolt 1 with right joint 3 is equipped with truncated cone joint 4; Described excessive fillet is arranged at the jointing place of described truncated cone joint 4 and the body of bolt 1.
The edge of described left joint 2 end is provided with chamfering 6.
The end of described right joint 3 is connected with shaft shoulder portion 8 by truncated cone joint 4; Described shaft shoulder portion 8 is provided with knuckle 5 with the jointing place of corresponding truncated cone joint 4.
Described left joint 2 and be equipped with outside thread; Outside thread on described left joint is by the edge of the truncated cone joint 4 of chamfering 6 extension; Outside thread on described right joint 3 is extended to the edge of the truncated cone joint 4 on right side by the edge of the truncated cone joint 4 in left side.
The end of described left link portions is provided with the tapped hole 7 along the body of bolt 1 axial direction.
The tensile strength of the described body of bolt 1: 900-1100N/mm2, yield ratio: more than 0.9.
The tensile strength of the described body of bolt 1: 1100-1300N/mm2, yield ratio: more than 0.9.
It is emphasized that this through bolt is divided into " 10.9 " grade high-strength through bolt and " 10.9 " grade high-strength through bolt.
About selection: 35CrMo, 40Cr high-strength material selected by " 10.9 " grade high-strength through bolt; And 40CrNiMo, 42CrMo high-strength material selected by " 12.9 " grade high-strength through bolt.
Structural design aspect: the Elastic Bolts structurally adopting undergauge rod-type, left joint 2 and the right joint 3 at the body of bolt 1 two ends are all designed to 90% of threaded core area, add king-bolt flexibility, change force-bearing situation, improve the fatigue behaviour of bolt.This kind of structural bolts can not only reduce the impact of temperature on bolt strength, can be applicable to bear the alternate load complex situations large with vibration.
Anti fatigue Design: in the place of screw cross-section size or alteration of form by comparatively Rouno Cormer Pregrinding Wheel smooth transition, be embodied in the knuckle 5 of left joint 2 and right joint 3 and the body of bolt 1 joint, eliminate burr, all edge designs of part become smooth; In addition, part numbering, mark beat embossing seal place selection at low stress position.
Optimization processing technology: raw material → cold upset forming → screw thread process (rolled thread) → heat treatment → surface treatment → sorted and packaged, " 12.9 " level generally adopts thread rolling process after first heat treatment.
" 12.9 " grade high-strength through bolt by Optimization Technology, is first heat-treated, then roll threading, part surface is strengthened process, and obtains residual compressive stress, make the fatigue limit of part improve 70-100%, can also improve stock utilization.Be used in line vortex sorter can check cold upset forming at any time after part whether have crackle or other defect.
The key technical indexes:
" 10.9 " grade high-strength through bolt: tensile strength: 900-1100N/mm2, yield ratio: more than 0.9;
" 12.9 " grade high-strength through bolt: tensile strength: 1100-1300N/mm2, yield ratio: more than 0.9.
The above, it is only preferred embodiment of the present utility model, not any restriction is made to technical scope of the present utility model, therefore every above embodiment is done according to technical spirit of the present utility model any trickle amendment, equivalent variations and modification, all still belong in the scope of the technical solution of the utility model.
Claims (7)
1. a high strength through bolt, comprise the body of bolt (1), one end of the described body of bolt (1) is provided with left joint (2), the other end is provided with right joint (3), it is characterized in that: described left joint (2) is identical with right joint (3) diameter and be greater than the diameter of the body of bolt (1); Described left joint (2) and right joint (3) are equipped with knuckle (5) with the body of bolt (1) joint; The diameter of described left joint (2) and right joint (3) is 1.5 ~ 2 times of the body of bolt (1) diameter; The side that described left joint (2) is connected with the body of bolt (1) with right joint (3) is equipped with truncated cone joint (4); Described knuckle (5) is arranged at the jointing place of described truncated cone joint (4) and the body of bolt (1).
2. a kind of high strength through bolt according to claim 1, is characterized in that: the edge of the end of described left joint (2) is provided with chamfering (6).
3. according to a kind of high strength through bolt shown in claim 1, it is characterized in that: the end of described right joint (3) is connected with shaft shoulder portion (8) by truncated cone joint (4); Described shaft shoulder portion (8) is provided with knuckle (5) with the jointing place of corresponding truncated cone joint (4).
4. a kind of high strength through bolt according to claim 2, is characterized in that: described left joint (2) and be equipped with outside thread; Outside thread on described left joint is by the edge of the truncated cone joint (4) of chamfering (6) extension; Outside thread on described right joint (3) is extended to the edge of the truncated cone joint (4) on right side by the edge of the truncated cone joint (4) in left side.
5. a kind of high strength through bolt according to claim 1, is characterized in that: the end of described left joint (2) is provided with the tapped hole (7) along the body of bolt (1) axial direction.
6. according to a kind of high strength through bolt of claim 1 gained, it is characterized in that: the tensile strength of the described body of bolt (1): 900-1100N/mm2, yield ratio: more than 0.9.
7. according to a kind of high strength through bolt of claim 1 gained, it is characterized in that: the tensile strength of the described body of bolt (1): 1100-1300N/mm2, yield ratio: more than 0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492231.9U CN204985246U (en) | 2015-07-06 | 2015-07-06 | High strength tie -rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492231.9U CN204985246U (en) | 2015-07-06 | 2015-07-06 | High strength tie -rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204985246U true CN204985246U (en) | 2016-01-20 |
Family
ID=55119619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520492231.9U Expired - Fee Related CN204985246U (en) | 2015-07-06 | 2015-07-06 | High strength tie -rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204985246U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023554A (en) * | 2017-04-28 | 2017-08-08 | 湖北玖天机车部件有限公司 | A kind of double end tooth stud and preparation method thereof |
| CN107131197A (en) * | 2017-05-03 | 2017-09-05 | 杨聪辉 | A kind of U-bolt and its manufacture craft |
| CN110552945A (en) * | 2019-07-31 | 2019-12-10 | 上海中船三井造船柴油机有限公司 | novel fastening structure of low-speed diesel engine through bolt |
-
2015
- 2015-07-06 CN CN201520492231.9U patent/CN204985246U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023554A (en) * | 2017-04-28 | 2017-08-08 | 湖北玖天机车部件有限公司 | A kind of double end tooth stud and preparation method thereof |
| CN107131197A (en) * | 2017-05-03 | 2017-09-05 | 杨聪辉 | A kind of U-bolt and its manufacture craft |
| CN110552945A (en) * | 2019-07-31 | 2019-12-10 | 上海中船三井造船柴油机有限公司 | novel fastening structure of low-speed diesel engine through bolt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204985246U (en) | High strength tie -rod | |
| CN201318923Y (en) | Split type go-no-go gauge | |
| CN103438088A (en) | Marine engine nodular cast iron crankshaft | |
| CN204851922U (en) | Boats and ships engine tie -rod | |
| CN202851873U (en) | Combined gear | |
| CN202212594U (en) | Arc lathe tool for processing seal ring | |
| CN203742473U (en) | Thread buckling structure for non-excavation drill stem | |
| CN202667250U (en) | Composite hard alloy roll | |
| CN203738679U (en) | Labor-saving wrench | |
| CN202789966U (en) | Quincuncial bolt | |
| CN203292181U (en) | Steel rolling roller | |
| CN205223500U (en) | Utmost point high -strength steel cord | |
| CN203793902U (en) | Reinforced steel pipe protective jacket | |
| CN204284377U (en) | A kind of two width plate milling pulleys be applied on ship lift | |
| CN205736673U (en) | A kind of rear axle of electric automobile semiaxis | |
| CN204677420U (en) | A kind of drilling pump assembly type bent axle | |
| CN201997568U (en) | Anti-shiver device | |
| CN203627777U (en) | Hydraulic forging press main cylinder | |
| CN203686230U (en) | Split valve rod structure of rail ball valve | |
| CN203500260U (en) | Light-weight middle spline shaft forge piece of transmission shaft | |
| CN202045782U (en) | Special-shaped guide ring of tyre die | |
| CN204127052U (en) | A kind of round steel link | |
| CN202520804U (en) | Split-type motor output gear | |
| CN202673979U (en) | Crankshaft | |
| CN205772795U (en) | A kind of novel suspender belt shackle |
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: 20160120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |