CN209398715U - Flange face bolt - Google Patents
Flange face bolt Download PDFInfo
- Publication number
- CN209398715U CN209398715U CN201822052879.0U CN201822052879U CN209398715U CN 209398715 U CN209398715 U CN 209398715U CN 201822052879 U CN201822052879 U CN 201822052879U CN 209398715 U CN209398715 U CN 209398715U
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- China
- Prior art keywords
- bolt
- curved section
- straightway
- flange portion
- flange
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- 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.)
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- 230000007704 transition Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 1
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- Clamps And Clips (AREA)
Abstract
The utility model provides a flange face bolt, includes bolt head (1), bolt pole portion (3) and connects screw head (1) with flange portion (2) between bolt pole portion (3), bolt pole portion (3) and flange portion (2) junction adopt bolt fillet (31) transition, flange portion (2) are flange portion bottom surface (21) towards the one side of bolt pole portion (3), and the line segment that flange portion bottom surface (21) axial cross-section become comprises straightway (211) and curve section (213), straightway (211) one end link to each other with bolt fillet (31) end, and the other end links to each other with curve section (213), curve section (213) are outer convex type curve. The pressing force is stronger and the connecting piece is not easy to fall off.
Description
Technical field
The utility model relates to the bolt parts of fastener areas, and in particular to a kind of flange face bolt.
Background technique
Flange face bolt is as a kind of the most commonly used fastener, using very extensive in industrial circle.GB/
A kind of hexagon flange bolt is described in T16674.1-2016, referring to Fig. 3, flange face 4 is the inclined-plane of certain angle, inclination
Angle [alpha] is usually reversed 0.25 ° -1.025 °.Bolt is in rundown process, when flange face 4 and basal plane start to contact, contact site
For bolt flange face outer rim.With being gradually increased for screw-down torque, flange face 4 is gradually varied to face by the line contact of outer rim and connects
Touching, flange face 4 also start flexible deformation, and final realization flange face 4 is bonded with basal plane, and flange face angle becomes 0 °.While by
Bounce is produced in the flexible deformation of flange face 4, certain anti-loose effect can be played.Start flexible deformation in flange face 4
When, flange face 4 and connected piece generate relative motion, and 4 outer of flange face can scrape outward connector surface, will lead to connection
Situations such as there is being scratched even conquassation in part surface, rubbing surface is uneven.
Summary of the invention
The purpose of the utility model is to overcome existing flange face bolts easily to scrape, is crushed the problem of connector surface, provides
A kind of flange face bolt will not be crushed, and scrape connector surface, clamping force is stronger, is not easy to loosen.
In order to achieve the above object, the technical solution of the utility model is as follows:
A kind of flange face bolt, including bolt head, bolt shank and it is connected to the screw head and the bolt
Flange portion between bar portion, the bolt shank and flange portion junction use bolt round corner transition, and the flange portion is towards spiral shell
The one side of bolt stem is flange portion bottom surface, and line segment formed by the axial cross section of the flange portion bottom surface is by straightway and curved section structure
At described straightway one end is connected with bolt round corner end, and the other end is connected with curved section, and the curved section is that male type is bent
Line.
The straightway is parallel to the horizontal plane or angle with horizontal plane is in 0.25 ° -1 °.
The straightway is parallel to the horizontal plane.
The radical length of the straightway: radical length=1:2-1:3 of curved section.
The axial height of the curved section: bolt diameter=3:200-3:100.
Further include changeover portion between the straightway and curved section, the changeover portion respectively with straightway and curved section phase
Connection is cut, the two-end-point of the changeover portion is point of contact.
The radical length of straightway: radical length=5:1-10:3 of changeover portion.
The curved section is male type minor arc curve or male type major arc curve or waveform type curve, the wave
Shape type curve protrusions portion is close to flange portion edge section.
The curved section is male type minor arc curve, and the curved section is located at flange portion edge section and horizontal plane phase
It cuts, endpoint of the curved section on flange portion edge is point of contact.
Compared with prior art, the invention has the benefit that
1, line segment formed by the axial cross section of flange portion bottom surface is made of straightway and curved section in the utility model, curved section
For male type circular curve, in rundown process, when beginning, flange portion bottom and connector surface contact surface are few, connect for line face
Touching, frictional force when tightening is small, less to connector surface bring scratch, after becoming larger with screw-down torque, flange portion bottom surface
Plane-plane contact is gradually varied to by line face contact with connector surface, transient mode is more smooth and uniform, effectively reduces connected
The case where part surface is scratched or is crushed;Straightway prevents final flange to provide enough joint surfaces when final compress
It is caused to be crushed by pressure is excessive in portion;After tightening, curved section deformation produces bounce, the more common flange face of amount of elastic deformation
Bolt is bigger, and clamping force is bigger.
2, straightway is parallel to the horizontal plane in the utility model, and such straightway is easier to be bonded with connector surface, protects
The card final contact condition in flange portion bottom surface is plane contact.
3, further include changeover portion between straightway and curved section described in the utility model, the changeover portion respectively and directly
Line segment and the tangent connection of curved section, the two-end-point of the changeover portion are point of contact.Stress meeting caused by curve rapid lapse of time deformation
Curved section and straightway junction is set to generate metal fracture, and changeover portion can make in stress to connector surface, to become
For clamping force.It is that the transition of arc section toward straightway is more smooth uniform simultaneously in rundown process.
4, in the utility model curved section axial height: bolt diameter=3:200-3:100, if ratio is too low,
Then curved section is lower, and clamping force reduces, and anti-loose effect weakens, if ratio is excessively high, curved section is got higher, and deformation quantity can increase,
Cause power caused by flange face compressing connector surface bigger, easily damages connector surface by pressure.
5, the radical length of straightway described in the utility model: radical length=1:2-1:3 of curved section, curved section with
The contact surface on connector surface is greater than the contact surface of straightway and connector surface, because of the masterpiece that rebounds caused by curved section deformation
It is big with area, conducive to the clamping of bolt, while avoiding clamping force excessive and scratch is generated to joint face.
6, curved section described in the utility model is located at flange portion edge section and horizontal plane is tangent, and the curved section is in method
Endpoint on blue portion edge is point of contact.So that flange portion edge is easier to be bonded with connector surface, avoid generating point in edge
Sharp scratch.
Detailed description of the invention
Fig. 1 is the main view of the utility model;
Fig. 2 is the utility model partial axial section schematic diagram;
Fig. 3 is a kind of partial axial section schematic diagram for hexagon flange bolt that GB/T16674.1-2016 is introduced;
In figure: bolt head 1, flange portion 2, bolt shank 3, flange face 4, flange portion bottom surface 21, bolt round corner 31, straight line
Section 211, changeover portion 212, curved section 213.
Specific embodiment
Explanation and specific embodiment are described in further detail the utility model with reference to the accompanying drawing.
Referring to Fig. 1 and Fig. 2, a kind of flange face bolt, including bolt head 1, bolt shank 3 and it is connected to the screw rod
Flange portion 2 between head 1 and the bolt shank 3, the bolt shank 3 use bolt round corner 31 with 2 junction of flange portion
The one side of transition, the flange portion 2 towards bolt shank 3 is flange portion bottom surface 21, formed by 21 axial cross section of flange portion bottom surface
Line segment is made of straightway 211, changeover portion 212 and curved section 213;
The straightway 211 is parallel to the horizontal plane, and guarantees straightway 211 to provide enough engagements when final compress
Face, the guarantee final contact condition of bolt are plane contact, prevent final pressure is excessive from causing to be crushed.
The curved section 213 is male type minor arc curve, and less than 180 °, the curved section 213 is located at central angle
2 edge section of flange portion and horizontal plane are tangent, and endpoint of the curved section 213 on 2 edge of flange portion is point of contact, rundown process
In, flange portion bottom surface is gradually varied to plane-plane contact by line face contact with connector surface, and transient mode is more smooth and uniform, makes
It obtains flange portion edge to be easier to be bonded with connector surface, avoids generating sharp scratch in edge.
Described 211 one end of straightway is connected with 31 end of bolt round corner, the changeover portion 212 and straightway 211 and song
The tangent connection of line segment 213, the two-end-point of the changeover portion 212 are point of contact.Avoid the connection of straightway 211 and curved section 213
Place generates metal fracture.
The radical length of the straightway 211: the radical length of changeover portion 212: radical length=1 of curved section 213:
0.2-0.3:2-3;It ensure that the contact surface on curved section 213 and connector surface is greater than connecing for straightway 211 and connector surface
Contacting surface, because bounce active area caused by 213 deformation of curved section is big, conducive to the clamping of bolt.
The axial height of the curved section 213: bolt diameter=3:200-3:100;The axial height of curved section 213
For from curved section 213 flange portion edge endpoint to another endpoint oblique line height of curved section 213, guaranteeing there are enough clamping forces
In the case where, scratch will not be generated.
Claims (7)
1. a kind of flange face bolt, including bolt head (1), bolt shank (3) and it is connected to the bolt head (1) and institute
The flange portion (2) between bolt shank (3) is stated, the bolt shank (3) and flange portion (2) junction use bolt round corner (31)
Transition, the one side of the flange portion (2) towards bolt shank (3) are flange portion bottom surface (21), it is characterised in that: the flange portion
Line segment formed by bottom surface (21) axial cross section is made of straightway (211) and curved section (213), the straightway (211) one
End is connected with bolt round corner (31) end, and the other end is connected with curved section (213), and the curved section (213) is male type curve,
The curved section (213) is greater than or equal to bolt at a distance from the plane of one end that straightway (211) is connected to bolt head (1)
Distance of head (1) plane to bolt round corner (31) end, described other positions of curved section (213) to bolt head (1) plane
Distance be greater than bolt head (1) plane to bolt round corner (31) end distance.
2. a kind of flange face bolt according to claim 1, it is characterised in that: the straightway (211) and horizontal plane
In parallel.
3. a kind of flange face bolt according to claim 1, it is characterised in that: the radical length of the straightway (211):
Radical length=1:2-1:3 of curved section (213).
4. a kind of flange face bolt according to claim 1, it is characterised in that: the axial height of the curved section (213):
Bolt diameter=3:200-3:100.
5. a kind of flange face bolt according to claim 1, it is characterised in that: the straightway (211) and curved section
(213) further include changeover portion (212) between, the changeover portion (212) respectively with straightway (211) and curved section (213) phase
Connection is cut, the two-end-point of the changeover portion (212) is point of contact.
6. a kind of flange face bolt according to claim 5, it is characterised in that: the radical length of straightway (211): transition
Radical length=5:1-10:3 of section (212).
7. a kind of flange face bolt according to claim 1, it is characterised in that: the curved section (213) is male type
Minor arc curve, the curved section (213) is tangent in flange portion (2) edge section and horizontal plane, the curved section (213) and level
The point of contact of face intersection is apart from flange portion bottom surface (21) edge 0.2mm-0.4mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201822052879.0U CN209398715U (en) | 2018-12-07 | 2018-12-07 | Flange face bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201822052879.0U CN209398715U (en) | 2018-12-07 | 2018-12-07 | Flange face bolt |
Publications (1)
Publication Number | Publication Date |
---|---|
CN209398715U true CN209398715U (en) | 2019-09-17 |
Family
ID=67894021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201822052879.0U Active CN209398715U (en) | 2018-12-07 | 2018-12-07 | Flange face bolt |
Country Status (1)
Country | Link |
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CN (1) | CN209398715U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109356923A (en) * | 2018-12-07 | 2019-02-19 | 东风商用车有限公司 | Flange face bolt |
-
2018
- 2018-12-07 CN CN201822052879.0U patent/CN209398715U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109356923A (en) * | 2018-12-07 | 2019-02-19 | 东风商用车有限公司 | Flange face bolt |
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