CN108571504A - Accurate pretension bolt - Google Patents
Accurate pretension bolt Download PDFInfo
- Publication number
- CN108571504A CN108571504A CN201810433780.7A CN201810433780A CN108571504A CN 108571504 A CN108571504 A CN 108571504A CN 201810433780 A CN201810433780 A CN 201810433780A CN 108571504 A CN108571504 A CN 108571504A
- Authority
- CN
- China
- Prior art keywords
- indication hat
- instruction wheel
- hole
- indication
- pretension bolt
- 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
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000004519 grease Substances 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 6
- 230000005483 Hooke's law Effects 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention provides a kind of accurate pretension bolt, including head, screw rod, mandrel and instruction wheel；The end face on head is equipped with through-hole, and one end of screw rod is equipped with blind hole, and one end that screw rod is equipped with blind hole is fixed with head, and through-hole is coaxial with blind hole；Mandrel is simultaneously in through-hole and blind hole, one end of mandrel is arranged in blind via bottom, the other end of mandrel is pierced by through-hole and is fixed with instruction wheel, and the distance between instruction wheel to head end is blind hole height increased distance when reaching the pretightning force of requirement after accurate pretension bolt is installed.It the advantage is that pretightning force error is big when the accurate pretension bolt can solve the problems, such as to pre-tighten installation, carry out pre-tightening inconvenient and can not judge whether tools for bolts ' pretension relaxes.
Description
Technical field
The present invention relates to a kind of bolt, more particularly to a kind of accurate pretension bolt.
Background technology
As a kind of widely used mechanical fasteners and connector, bolt is in fields such as steel, petrochemical industry, weight equipments
It plays a crucial role.When operation, bolt pretightening should reach scheduled design value, just can guarantee unlikely when equipment operation
The stress relaxation caused by the factors such as vibration, sliding, fatigue and pressure and temp variation.According to statistics, 90% bolt connects, and is
Caused by pretightning force is inadequate when as installing.For equipment such as pressure vessel, wind-driven generators, be bolted failure can cause it is toxic
Poisonous gas leakage, equipment such as are collapsed at the heavy losses.
Traditional bolt mounting means have manually beat, torque wrench and hydraulic bolt tensioning jack.These three mounting means
There is a problem of that pretightning force error is big, need pre- clamping tool, required operating space greatly and can not judge what whether tools for bolts ' pretension relaxed.
Invention content
The present invention provides a kind of accurate pretension bolt, pretightning force error when which can solve to pre-tighten installation
Greatly, it carries out pre-tightening inconvenience and can not judge the problem whether tools for bolts ' pretension relaxes.
Including head, screw rod, mandrel and instruction wheel；The end face on head is equipped with through-hole, and one end of screw rod is equipped with blind hole,
One end that screw rod is equipped with blind hole is fixed with head, and through-hole is coaxial with blind hole；Mandrel is located in through-hole and blind hole simultaneously, mandrel
One end is arranged in blind via bottom, and the other end of mandrel is pierced by through-hole and is fixed with instruction wheel, and instruction wheel is between head end
Distance is blind hole height increased distance when reaching the pretightning force of requirement after accurate pretension bolt is installed.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：It is cased with finger outside instruction wheel
Show that cap, indication hat internal face coordinate with instruction wheel outside wall surface, instruction wheel moves in indication hat without departing from indication hat.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：It is set on the end face on head
It is toroidal cavity to have swivelling chute, swivelling chute, and the cap mouth edge of indication hat is rotation in swivelling chute；It is set on the wall surface of swivelling chute
It is annular to have swivelling chute snap ring, swivelling chute snap ring, and the cap mouth edge of indication hat is equipped with indication hat snap ring, and indication hat snap ring is ring
Shape；Swivelling chute snap ring coordinates the cap mouth edge card of indication hat with indication hat snap ring in swivelling chute.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：Blind hole, through-hole and refer to
Show and is filled with lubricating grease in cap.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：Blind via bottom is equipped with spiral shell
Pit, mandrel are equipped with external screw thread with the fixed one end of blind via bottom, and mandrel is fixed on by external screw thread with threaded hole cooperation blind
Hole bottom.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：It is cased with finger outside instruction wheel
Show that cap, indication hat internal face coordinate with instruction wheel outside wall surface, instruction wheel moves in indication hat without departing from indication hat；Instruction
The outer wall of wheel is equipped at least one fin, and the length direction of fin is identical as screw pre-tightening draw direction, on indication hat inner wall
Corresponding position is equipped at least one groove, and fin and groove surfaces coordinate one by one, and fin can stretch in groove along screw pre-tightening
Direction relative motion.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：It is cased with finger outside instruction wheel
Show that cap, indication hat internal face coordinate with instruction wheel outside wall surface, instruction wheel moves in indication hat without departing from indication hat；Instruction
The outer wall of wheel is equipped at least one groove, and the length direction of groove is identical as screw pre-tightening draw direction, on indication hat inner wall
Corresponding position is equipped at least one fin, and groove and institute's fin surface coordinate one by one, and fin can be drawn in groove along screw pre-tightening
Stretch direction relative motion.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：Indication hat, which is equipped with, to be surveyed
Measuring tank can measure instruction wheel the distance between to head end by measuring flume.
Further, the present invention provides a kind of accurate pretension bolt, can also have the feature that：Close to finger in instruction wheel
Show that the side of cap inner bottom surface is equipped with limited block, the distance between limited block to indication hat is less than threaded hole height.
The present invention provides a kind of accurate pretension bolt, by being arranged fixed central spindle and instruction wheel on screw rod, and according to up to
To requirement pretightning force when blind hole height because screw rod stretches it is increased distance determine instruction wheel to the distance of head end, make spiral shell
Bolt can accurately be stretched to determining length when pre-tightening, and realize accurate pre-tighten.Enable instruction wheel and mandrel by the way that indication hat is arranged
It is enough to be protected, improve the bolt durability.By the way that swivelling chute is arranged and is coordinated with swivelling chute snap ring and indication hat snap ring, make instruction
Cap and instruction wheel without departing from.By filling lubricating grease in blind hole, through-hole and indication hat, make blind hole inner wall, through-hole wall with
Will not all it occur between mandrel and between indication hat inner wall and instruction disk stuck.Mandrel is fixed on by using screw-thread fit
Blind hole bottom surface keeps instruction wheel adjustable to the distance between head end, and accurate pretension bolt is enable to be required in different pretightning forces
In the case of use.By the way that fin or groove are arranged on instruction wheel outer wall, and it is matched in the setting of indication hat corresponding position
Groove and fin, so that mandrel is easier to be rotated to be conveniently adjusted instruction wheel to the distance between head end and is judged to pre-tighten
Whether relax.By setting measuring flume on indication hat, make instruction wheel to the distance between head end that can measure.Pass through setting
Limited block makes mandrel without departing from threaded hole.
Description of the drawings
Fig. 1 is a kind of part section structural representation of accurate pretension bolt.
Fig. 2 is the parts the I local signal amplification figure of Fig. 1.
Fig. 3 is the A-A cross-sectional views of Fig. 1.
A kind of structural schematic diagram when Fig. 4 is accurate pretension bolt assembly use.
Reference numeral：Head 101, through-hole 101-1, swivelling chute 101-2, swivelling chute snap ring 101-3, screw rod 102, blind hole
102-1, threaded hole 102-2, mandrel 103, external screw thread 103-1, instruction wheel 104, groove 104-1, limited block 104-2, indication hat
105, fin 105-1, measuring flume 105-2, indication hat snap ring 105-3, lubricating grease 106, nut 2, flange 3, gasket 4, blind hole are high
Spend the distance h2 of the distance between H1, instruction wheel to head end H2, pit height h1, limited block to indication hat.
Specific implementation mode
The present invention will be further described in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, a kind of accurate pretension bolt, including head 101, screw rod 102, mandrel 103, instruction wheel
104, indication hat 105 and lubricating grease 106.
One end of screw rod 102 does not have screw thread, the other end of screw rod 102 to be equipped with screw thread.Do not have threaded one end on screw rod 102
End face is equipped with blind hole 102-1.Head 101 is equipped with through-hole 101-1 identical with the apertures above-mentioned blind hole 102-1.On screw rod 102
Do not have threaded one end to be fixed with hexagonal head 101.
Mandrel 103 is arranged in through-hole 101-1 and blind hole 102-1 simultaneously.The bottom of blind hole 102-1 is close to screw rod 102
If threaded one end, the bottoms blind hole 102-1 are equipped with threaded hole 102-2, and one end of mandrel 103 is equipped with external screw thread 103-1, core
One end of axis 103 is connected by the threaded hole 102-2 of external screw thread 103-1 and the bottoms blind hole 102-1.Instruction wheel 104 is circle
The other end of cylinder, mandrel 103 is pierced by blind hole 102-1 and is fixed with one end of instruction wheel 104.Instruction wheel 104 is to 101 end of head
Blind hole height H1 is because of screw rod 102 stretches increased distance when the distance between face reaches the pretightning force of requirement for the bolt.
Indication hat 105 is cased with outside instruction wheel 104, indication hat 105 is barrel-shaped, and the inner and outer wall of indication hat 105 is same
The Cylinder Surface of axis, 104 outer wall of instruction wheel and the cooperation of 105 inner wall of indication hat.The end face on head 101 is equipped with the rotation of circular ring shape
Slot 101-2.The cap mouth edge of indication hat 105 is arranged in swivelling chute 101-2, and the inner wall of indication hat 105 is with swivelling chute 101-2's
Interior sidewall surface coordinates.The inner wall of indication hat 105 is equipped with indication hat snap ring 105-3, and indication hat snap ring 105-3 is located at indication hat
105 cap mouth edge.Swivelling chute 101-2 interior sidewall surfaces are equipped with swivelling chute snap ring 101-3, and swivelling chute snap ring 101-3 is located at
The notch position of swivelling chute 101-2.Swivelling chute snap ring 101-3 and indication hat snap ring 105-3 coordinate clamping, the cap of indication hat 105
Mouth edge rotates in swivelling chute 101-2 and without departing from swivelling chute 101-2.
Limited block 104-2 is fixed on the other end of instruction wheel 104, limited block 104-2 is cylinder.Limited block 104-2
Distance to indication hat 105 is less than threaded hole height h1.It is provided with measuring flume 105-2, measuring flume on the bung hole end face of indication hat 105
The end face of the vertical instruction wheels of 105-2 104, the height of measuring flume 105-2 are instruction wheel 104 the distance between to 101 end face of head
Maximum value, measuring flume 105-2 is for measuring instruction wheel 104 the distance between to 101 end face of head.Blind hole 102-1 and indication hat
Lubricating grease 106 is filled in 105.
Head 101, through-hole 101-1, swivelling chute 101-2, screw rod 102, blind hole 102-1, threaded hole 102-2, mandrel 103,
External screw thread 103-1, instruction wheel 104, limited block 104-2 and indication hat 105 are coaxial.
As shown in figure 3, being along the circumferential direction evenly equipped with ten groove 104-1, groove 104- on the Cylinder Surface of instruction wheel 104
1 length direction is parallel with 104 axis of instruction wheel, and 105 inner wall of indication hat is equipped with ten fin 105-1, the length of fin 105-1
Spend that direction is parallel with 105 axis of indication hat, the position of groove 104-1 and fin 105-1 correspond, each groove 104-1 and
One fin 105-1 cooperation.
The operation principle and advantage of embodiment：
According to Hooke's law, tensile elongation is linear with pretightning force.Therefore when accurate pretension bolt is installed, first turn
Dynamic indication hat 105, makes indication hat 105 that instruction wheel 104 be driven to rotate, to adjust external screw thread 103-2 and threaded hole on mandrel 103
The cooperation distance of 102-2 is measured so as to adjust instruction wheel 104 to the distance between 101 end face of head H2 using measuring flume 105-2
Blind hole height H1 when instruction wheel 104 makes the distance reach target pretightning force for the bolt to the distance between 101 end face of head H2
Tensile elongation.
As shown in figure 4, in the bolts assemblies in use, two flanges 3 are to gasket 4 is arranged just and between two flanges 3,
The bolt penetrates in the bolt hole of the flange 3 of two docking, and rotates and stretch the bolt by two with the nut 2 of bolt cooperation
The flange 3 of docking compresses.During nut 2 stretches the bolt, mandrel 103 is not because by the stretching of nut 2, length
Degree does not change, and screw rod 102 by the stretching of nut 2 because extended.It is blind on screw rod 102 when reaching target pretightning force
The tensile elongation of hole height H1 is identical to the distance between 101 end face of head H2 as instruction wheel 104, and instruction wheel 104 is close to head
101 end faces, nut 2 can not rotate again, which completes to pre-tighten.
After installation when the tools for bolts ' pretension relaxes, instruction disk 104 leaves 101 end face of head, and indication hat 105, which can drive, to be referred to
Show that disk 104 rotates.Therefore it may determine that whether the tools for bolts ' pretension relaxes according to whether indication hat 105 can rotate.
The accurate pretension bolt of this programme can be according to Hooke's law, by controlling the tensile elongation of bolt 102 come accurate
The pretightning force of bolt is controlled, pretightning force error is only 5%, can meet wind-driven generator, pressure vessel etc. and control pretightning force
More demanding equipment.The tools for bolts ' pretension is simple to operate, and common spanner can be used to pre-tighten, and is by observing nut 2
It is no rotatable to determine whether the bolt reaches the pretightning force of setting.The bolt in the operating condition, can directly observe indication hat
105 it is whether rotatable determine whether tools for bolts ' pretension relaxes, without special detection device.The pretensioning operation space of the bolt
It is small, it is not necessarily to professional equipment.
Claims (9)
1. a kind of accurate pretension bolt, it is characterised in that：
Including head, screw rod, mandrel and instruction wheel；
The end face on the head is equipped with through-hole, and one end of the screw rod is equipped with blind hole, and the screw rod is equipped with the blind hole
One end fixed with the head, the through-hole and the blind hole are coaxial；
Simultaneously in the through-hole and the blind hole, one end of the mandrel is arranged in the blind via bottom, institute the mandrel
The other end for stating mandrel is pierced by the through-hole and is fixed with the instruction wheel, the instruction wheel between the head end away from
When reaching the pretightning force of requirement after for the accurate pretension bolt installation blind hole height it is increased with a distance from.
2. a kind of accurate pretension bolt as described in claim 1, it is characterised in that：
Indication hat is cased with outside the instruction wheel, the indication hat internal face coordinates with the instruction wheel outside wall surface, the instruction wheel
Movement is without departing from the indication hat in the indication hat.
3. a kind of accurate pretension bolt as claimed in claim 2, it is characterised in that：
The end face on the head is equipped with swivelling chute, and the swivelling chute is toroidal cavity, and the cap mouth edge of the indication hat exists
It is rotated in the swivelling chute；
The wall surface of the swivelling chute is equipped with swivelling chute snap ring, and the swivelling chute snap ring is annular, the cap mouth side of the indication hat
Edge is equipped with indication hat snap ring, and the indication hat snap ring is annular；
The swivelling chute snap ring coordinates the cap mouth edge card of the indication hat with the indication hat snap ring in the swivelling chute.
4. a kind of accurate pretension bolt as claimed in claim 2, it is characterised in that：
Lubricating grease is filled in the blind hole, the through-hole and the indication hat.
5. a kind of accurate pretension bolt as described in claim 1, it is characterised in that：
The blind via bottom is equipped with threaded hole, and the mandrel is equipped with external screw thread with the fixed one end of the blind via bottom, described
Mandrel is fixed on the blind via bottom by the external screw thread and threaded hole cooperation.
6. a kind of accurate pretension bolt as claimed in claim 5, it is characterised in that：
Indication hat is cased with outside the instruction wheel, the indication hat internal face coordinates with the instruction wheel outside wall surface, the instruction wheel
Movement is without departing from the indication hat in the indication hat；
The outer wall of the instruction wheel is equipped at least one fin, the length direction of the fin and the screw pre-tightening stretching side
To identical, corresponding position is equipped at least one groove on the indication hat inner wall, and the fin and the groove surfaces are matched one by one
It closes, the fin can be in the groove along the screw pre-tightening draw direction relative motion.
7. a kind of accurate pretension bolt as claimed in claim 5, it is characterised in that：
Indication hat is cased with outside the instruction wheel, the indication hat internal face coordinates with the instruction wheel outside wall surface, the instruction wheel
Movement is without departing from the indication hat in the indication hat；
The outer wall of the instruction wheel is equipped at least one groove, the length direction of the groove and the screw pre-tightening stretching side
To identical, corresponding position is equipped at least one fin on the indication hat inner wall, and the groove and institute's fin surface coordinate one by one,
The fin can be in the groove along the screw pre-tightening draw direction relative motion.
8. a kind of accurate pretension bolt as claimed in claims 6 or 7, it is characterised in that：
The indication hat is equipped with measuring flume, and the instruction wheel can be measured between the head end by the measuring flume
Distance.
9. a kind of accurate pretension bolt as claimed in claims 6 or 7, it is characterised in that：
In the instruction wheel limited block, the limited block to the indication hat are equipped with close to the side of the indication hat inner bottom surface
The distance between be less than the threaded hole height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433780.7A CN108571504A (en) | 2018-05-08 | 2018-05-08 | Accurate pretension bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810433780.7A CN108571504A (en) | 2018-05-08 | 2018-05-08 | Accurate pretension bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108571504A true CN108571504A (en) | 2018-09-25 |
Family
ID=63571986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810433780.7A Pending CN108571504A (en) | 2018-05-08 | 2018-05-08 | Accurate pretension bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108571504A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847326A (en) * | 2021-09-01 | 2021-12-28 | 宁波九龙紧固件制造有限公司 | Hexagonal-head screw bolt with hole and production process thereof |
| CN114109994A (en) * | 2021-11-08 | 2022-03-01 | 奇瑞汽车股份有限公司 | Bolt and fastening structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419523A (en) * | 1971-12-13 | 1975-12-31 | Modulus Corp | Strain indicators |
| GB8520640D0 (en) * | 1985-08-17 | 1985-09-25 | Rotabolt Ltd | Fastening method |
| CN1267362A (en) * | 1997-08-19 | 2000-09-20 | 帕屈西亚·安妮·西尼 | Load indicating fastener systems method and apparatus |
| US20040265074A1 (en) * | 2003-03-14 | 2004-12-30 | Sandvik Ab | Tool and cutting insert for the fine turning of grooves in workpieces |
| CN201233211Y (en) * | 2008-08-04 | 2009-05-06 | 哈尔滨电机厂有限责任公司 | Large-sized shaft coupling bolt pretension, extension and fine measurement device |
| CN202280717U (en) * | 2011-10-19 | 2012-06-20 | 无锡申穗船舶设备有限责任公司 | Hydraulic fitting-up bolt |
| US20130034393A1 (en) * | 2011-08-02 | 2013-02-07 | Iscar, Ltd. | Modular Cutting Tool Holder and Clamping Mechanism Therefor |
| CN202867494U (en) * | 2012-11-08 | 2013-04-10 | 杜德机械科技(上海)有限公司 | Bolt provided with pretightening force detecting rotary head |
| CN202867492U (en) * | 2012-11-08 | 2013-04-10 | 杜德机械科技(上海)有限公司 | Bolt provided with pretightening force pointer detecting ring |
| CN202867493U (en) * | 2012-11-08 | 2013-04-10 | 杜德机械科技(上海)有限公司 | Bolt provided with pretightening force detecting ring |
| CN203772475U (en) * | 2014-04-04 | 2014-08-13 | 中联重科股份有限公司 | Device for measuring the pretension of a coupling part |
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
| CN107339310A (en) * | 2017-06-30 | 2017-11-10 | 上海应谱科技有限公司 | A kind of intelligent fastener |
| CN107339309A (en) * | 2017-06-30 | 2017-11-10 | 上海应谱科技有限公司 | A kind of pretightning force monitoring system of intelligent fastener |
| CN208169302U (en) * | 2018-05-08 | 2018-11-30 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
-
2018
- 2018-05-08 CN CN201810433780.7A patent/CN108571504A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419523A (en) * | 1971-12-13 | 1975-12-31 | Modulus Corp | Strain indicators |
| GB8520640D0 (en) * | 1985-08-17 | 1985-09-25 | Rotabolt Ltd | Fastening method |
| GB2179459A (en) * | 1985-08-17 | 1987-03-04 | Rotabolt Ltd | Indicating tightness of fastening device |
| CN1267362A (en) * | 1997-08-19 | 2000-09-20 | 帕屈西亚·安妮·西尼 | Load indicating fastener systems method and apparatus |
| US20040265074A1 (en) * | 2003-03-14 | 2004-12-30 | Sandvik Ab | Tool and cutting insert for the fine turning of grooves in workpieces |
| CN201233211Y (en) * | 2008-08-04 | 2009-05-06 | 哈尔滨电机厂有限责任公司 | Large-sized shaft coupling bolt pretension, extension and fine measurement device |
| US20130034393A1 (en) * | 2011-08-02 | 2013-02-07 | Iscar, Ltd. | Modular Cutting Tool Holder and Clamping Mechanism Therefor |
| CN202280717U (en) * | 2011-10-19 | 2012-06-20 | 无锡申穗船舶设备有限责任公司 | Hydraulic fitting-up bolt |
| CN202867494U (en) * | 2012-11-08 | 2013-04-10 | 杜德机械科技(上海)有限公司 | Bolt provided with pretightening force detecting rotary head |
| CN202867492U (en) * | 2012-11-08 | 2013-04-10 | 杜德机械科技(上海)有限公司 | Bolt provided with pretightening force pointer detecting ring |
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| CN203772475U (en) * | 2014-04-04 | 2014-08-13 | 中联重科股份有限公司 | Device for measuring the pretension of a coupling part |
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
| CN107339310A (en) * | 2017-06-30 | 2017-11-10 | 上海应谱科技有限公司 | A kind of intelligent fastener |
| CN107339309A (en) * | 2017-06-30 | 2017-11-10 | 上海应谱科技有限公司 | A kind of pretightning force monitoring system of intelligent fastener |
| CN208169302U (en) * | 2018-05-08 | 2018-11-30 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847326A (en) * | 2021-09-01 | 2021-12-28 | 宁波九龙紧固件制造有限公司 | Hexagonal-head screw bolt with hole and production process thereof |
| CN114109994A (en) * | 2021-11-08 | 2022-03-01 | 奇瑞汽车股份有限公司 | Bolt and fastening structure |
| CN114109994B (en) * | 2021-11-08 | 2022-09-16 | 奇瑞汽车股份有限公司 | Bolt and fastening structure |
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Application publication date: 20180925 |