CN206478086U - Metric system self tapping backing-up screw - Google Patents
Metric system self tapping backing-up screw Download PDFInfo
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- CN206478086U CN206478086U CN201720108502.5U CN201720108502U CN206478086U CN 206478086 U CN206478086 U CN 206478086U CN 201720108502 U CN201720108502 U CN 201720108502U CN 206478086 U CN206478086 U CN 206478086U
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Abstract
The utility model discloses a kind of metric system self tapping backing-up screw, it includes head of screw body etc., it is connected between head of screw body and screw-threaded coupling main body by shank of screw, screw-threaded coupling main body and self tapping shoot cross cut end (of a beam) and be equipped with screw thread, and self tapping shoots termination positioned at screw-threaded coupling bottom part body；The basic structure of the common angular thread of screw thread application standard, screw thread dorsad a flank angle by fastening face angle be 15 ~ 20 °, towards being 30 ° by the angle of the pressure angle measurement of fastening face, a cusp of screw thread is plane transition structure or natural arc transition structure.The utility model metric system self tapping backing-up screw can be applied to the fastening applications occasion that high intensity cold pricks the base materials such as steel plate, aluminium alloy castings, plastics, possesses relatively low torque of shooting and releases the application for being fastenedly connected technology of torque with higher static state；Mounted piece is possessed higher axial clamping force and release torque with static state, solve by the axial clamping force of fastener and the attenuation problem of locked rotor torque.
Description
Technical field
The utility model is related to a kind of screw, more particularly to a kind of metric system self tapping backing-up screw.
Background technology
It is well known that no matter screw threads for fastening is in mechanized equipment, automobile making, household electrical appliance and the daily life in people
All it is used widely, as the fastening and connection between component of machine, is threadedly coupled even more indispensable in work.In numerous rows
In industry, to cut down the number of intermediate links, also increasingly increased using the locking occasion of self tapping, country has been issued for this such as GB/T 6559-
The standards such as the screw rod of 1986 self-tapping lock screws；But these standards can not meet it is high moment of torsion is installed, high axial clamping force and compared with
The high locking applications exited.Largely monopolized suitable for the tightening technology of high request occasion by foreign patent with enterprise,
The country be badly in need of a kind of metric screw self tapping checknut of exploitation and at home in manufacturing industry tightening technology popularization.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of metric system self tapping backing-up screw, and it can be applied to high-strength
Degree is cold to prick steel plate, aluminium alloy castings, the fastening applications occasion of the base material such as plastics, possesses and relatively low shoots torque and higher static state
Release the application for being fastenedly connected technology of torque；Make possess higher axial clamping force between the installed part that is fastened, solve
By the axial clamping force of fastener and the attenuation problem of locked rotor torque.
The utility model is to solve above-mentioned technical problem by following technical proposals：A kind of locking spiral shell of metric system self tapping
Nail, it includes head of screw body, shank of screw, screw-threaded coupling main body, self tapping and shoots termination, screw thread, head of screw body and screw fastening
It is connected between tight main body by shank of screw, screw-threaded coupling main body and self tapping shoot cross cut end (of a beam) and be equipped with screw thread, and self tapping is attacked
Enter termination positioned at screw-threaded coupling bottom part body；The basic structure of the common angular thread of screw thread application standard, the screw thread back of the body
It is 15 ~ 20 ° to the angle of a flank angle by fastening face, presses the angle of angle measurement to be 30 °, screw thread towards by fastening face
A cusp be plane transition structure or natural arc transition structure.
Preferably, the screw thread is divided into eight equal portions by eight eight equal parts lines, eight eight equal parts lines be 1/8th lines,
Eight/two wires, 3/8ths lines, 4/8ths lines, 5/8ths lines, 6/8ths lines, 7/8ths lines, 8/8ths lines,
The intersection point of 4/8ths lines and tooth mountain eminence is the first intersection point, and eight/two wires with being dorsad by the intersection point of the tooth side of fastening face
Second intersection point, the point of contact circular arc between the first intersection point and the second intersection point is Bottom of Thread circular arc.
Preferably, the eight/two wires intersects at the 3rd point of contact, 3/8ths lines and screw thread phase with screw thread
The 4th intersection point is met at, the straight line and eight/two wires that the 3rd point of contact is connected with the 4th intersection point form Bottom of Thread footpath angle, ridge
The angle at bottom footpath angle is 20 °.
Preferably, the Bottom of Thread circular arc and Bottom of Thread footpath angle constitute the asymmetric tooth bottom of metric system self tapping backing-up screw
Gauge structure.
Preferably, the lateral cross section that the self tapping shoots termination is in triangle arc transition shape and flat with screw-threaded coupling main body
Face in 8 ~ 15 ° of angles, self tapping shoot termination tooth mountain it is ascending and in cone to being transitioned into screw-threaded coupling main body, screw-threaded coupling master
Screw thread on body progressively narrows down to self tapping according to tooth chevron shape and shoots termination, and self tapping shoots the length of termination screwing screw thread
Less than or equal to the nominal diameter of screw-threaded coupling main body screwing screw thread.
Positive effect of the present utility model is：The utility model metric system self tapping backing-up screw can be applied to high intensity
It is cold to prick steel plate, aluminium alloy castings, the fastening applications occasion of the base material such as plastics, possess and relatively low shoot torque and higher static state pine
The application for being fastenedly connected technology of de- torque；Mounted piece is possessed higher axial clamping force, solve by the axial direction of fastener
The attenuation problem of clamping force and locked rotor torque.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model metric system self tapping backing-up screw.
Fig. 2 is the structural representation of the screw thread of the utility model metric system self tapping backing-up screw.
Embodiment
The utility model preferred embodiment is provided below in conjunction with the accompanying drawings, to describe the technical solution of the utility model in detail.
As depicted in figs. 1 and 2, the utility model metric system self tapping backing-up screw includes head of screw body 1, shank of screw 2, screw fastening
Tight main body 3, self tapping shoot termination 4, screw thread 5, are connected between head of screw body 1 and screw-threaded coupling main body 3 by shank of screw 2,
Screw-threaded coupling main body 3 and self tapping shoot the surface of termination 4 and are equipped with screw thread 5, and self tapping shoots termination 4 positioned at screw-threaded coupling main body
3 bottoms；The basic structure of the application common angular thread of standard of screw thread 5, the dorsad tooth side by fastening face of screw thread 5
The angle of angle beta is 15 ~ 20 °, and towards being 30 ° by the pressure angle measurement α of fastening face angle, a cusp 51 of screw thread 5 is flat
Face transition structure or natural arc transition structure.
Screw thread 5 is divided into eight equal portions by eight eight equal parts lines, and eight eight equal parts lines are 1/8th lines 81,2/8ths
Line 82,3/8ths lines 83,4/8ths lines 84,5/8ths lines 85,6/8ths lines 86,7/8ths lines 87, eight/
The intersection point of eight lines 88,4/8ths lines 84 and tooth mountain eminence is the first intersection point R1, eight/two wires 82 with dorsad by fastening face
The intersection point of tooth side is the second intersection point R2, and the point of contact circular arc between the first intersection point R1 and the second intersection point R2 is Bottom of Thread circular arc R, this
Sample improves fastening performance.
Eight/two wires 82 intersects at the 3rd point of contact γ 1 with screw thread 5, and 3/8ths lines 83 intersect with screw thread 5
In the 4th intersection point γ 2, the 3rd point of contact γ 1 Bottom of Thread footpath is formed with the 4th intersection point γ 2 straight lines being connected and eight/two wires 82
Angle γ, Bottom of Thread footpath angle γ angle are 20 °.
Bottom of Thread circular arc R and Bottom of Thread footpath angle γ constitute the asymmetric tooth bottom gauge structure of metric system self tapping backing-up screw,
The helix of the stress tooth side of asymmetric tooth bottom gauge structure formation is smaller than the lead angle of plain screw, is formed with connected piece
Screw thread bears larger axle power clamping force, with the relaxation effect for not sliding, not releasing；Asymmetric tooth bottom gauge structure is compared simultaneously
Conventional screw suitably increases the core diameter of thread of screw thread 5, improves the overall moment of rupture of metric system self tapping backing-up screw.
Self tapping shoots the lateral cross section of termination 4 in triangle arc transition shape and is in 8 ~ 15 ° with the plane of screw-threaded coupling main body 3
Angle, self tapping shoot termination 4 tooth mountain it is ascending and in cone to being transitioned into screw-threaded coupling main body 3, screw-threaded coupling main body 3
Screw thread 5 progressively narrows down to self tapping according to tooth chevron shape and shoots termination 4, and the length that self tapping shoots the screwing screw thread 5 of termination 4 is small
In the nominal diameter equal to the screwing screw thread 5 of screw-threaded coupling main body 3, by fastener when shooting termination 4 by self tapping, become by small
It is big to gradually form screw thread, the angle at the Ya Shan angles of main body screw be it is smaller than common angular thread 10 ~ 15 °, reduction main body screw with
Connected piece is screwed into resistance, and screw thread is substantially improved shoot locking property；Due to the main body Ya Shan both sides of self tapping checknut
Angle asymmetry, shoot and exit that formed helix is misaligned, the frictional force for being allowed to produce when releasing than is commonly set
The triangle tapping screw thread of meter is big, and formation is preferably anti-to release performance.
In summary, the utility model metric system self tapping backing-up screw can be applied to high intensity cold prick steel plate, aluminium alloy castings,
The fastening applications occasion of the base materials such as plastics, possess it is relatively low shoot that torque and higher static state releases torque be fastenedly connected technology
Application；Mounted piece is possessed higher axial clamping force, solve declining by the axial clamping force of fastener and locked rotor torque
Subtract problem.The utility model screw is fabricated by using low-carbon cold heading steel or low-carbon alloy steel, through over carburizing or Tempering and Quenching,
Make product that there is higher hardness and intensity, and possess the self tapping backing-up screw of certain toughness, by the basic demand of Mechanical Fundamentals
It is surface-treated.
Particular embodiments described above, to the technical problem, technical scheme and beneficial effect of solution of the present utility model
It is further described, should be understood that and the foregoing is only specific embodiment of the utility model, not
For limiting the utility model, all any modifications within spirit of the present utility model and principle, made, equivalent substitution, change
Enter, should be included within protection domain of the present utility model.
Claims (5)
1. a kind of metric system self tapping backing-up screw, it is characterised in that it includes head of screw body, shank of screw, screw-threaded coupling main body, self tapping
Termination, screw thread are shot, is connected between head of screw body and screw-threaded coupling main body by shank of screw, screw-threaded coupling main body and self tapping
Shoot cross cut end (of a beam) and be equipped with screw thread, self tapping shoots termination positioned at screw-threaded coupling bottom part body；Screw thread application standard
The basic structure of common angular thread, the angle of a screw thread dorsad flank angle by fastening face is 15 ~ 20 °, towards quilt
The angle of the pressure angle measurement of fastening face is 30 °, and a cusp of screw thread is plane transition structure or natural arc transition structure.
2. metric system self tapping backing-up screw as claimed in claim 1, it is characterised in that the screw thread is by eight eight equal parts lines
It is divided into eight equal portions, eight eight equal parts lines are 1/8th lines, eight/two wires, 3/8ths lines, 4/8ths lines, 5/8ths
The intersection point of line, 6/8ths lines, 7/8ths lines, 8/8ths lines, 4/8ths lines and tooth mountain eminence is the first intersection point, eight points
Two wires with by the intersection point of the tooth side of fastening face being dorsad the second intersection point, the point of contact circular arc between the first intersection point and the second intersection point is
Bottom of Thread circular arc.
3. metric system self tapping backing-up screw as claimed in claim 2, it is characterised in that the eight/two wires and screw thread phase
The 3rd point of contact is met at, 3/8ths lines intersect at the 4th intersection point, the straight line that the 3rd point of contact is connected with the 4th intersection point with screw thread
Bottom of Thread footpath angle is formed with eight/two wires, the angle at Bottom of Thread footpath angle is 20 °.
4. metric system self tapping backing-up screw as claimed in claim 3, it is characterised in that the Bottom of Thread circular arc and Bottom of Thread
Footpath angle constitutes the asymmetric tooth bottom gauge structure of metric system self tapping backing-up screw.
5. metric system self tapping backing-up screw as claimed in claim 1, it is characterised in that the self tapping shoots the lateral cross section of termination
In triangle arc transition shape and with the plane of screw-threaded coupling main body in 8 ~ 15 ° of angles, the tooth mountain that self tapping shoots termination is ascending
And progressively narrow down to self tapping according to tooth chevron shape to the screw thread being transitioned into screw-threaded coupling main body, screw-threaded coupling main body in cone
Termination is shot, the length that self tapping shoots termination screwing screw thread is straight less than or equal to the nominal of screw-threaded coupling main body screwing screw thread
Footpath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720108502.5U CN206478086U (en) | 2017-02-05 | 2017-02-05 | Metric system self tapping backing-up screw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720108502.5U CN206478086U (en) | 2017-02-05 | 2017-02-05 | Metric system self tapping backing-up screw |
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| CN206478086U true CN206478086U (en) | 2017-09-08 |
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| CN201720108502.5U Active CN206478086U (en) | 2017-02-05 | 2017-02-05 | Metric system self tapping backing-up screw |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816483A (en) * | 2017-02-05 | 2018-03-20 | 超捷紧固系统(上海)股份有限公司 | Metric system self tapping backing-up screw and its manufacture method |
-
2017
- 2017-02-05 CN CN201720108502.5U patent/CN206478086U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816483A (en) * | 2017-02-05 | 2018-03-20 | 超捷紧固系统(上海)股份有限公司 | Metric system self tapping backing-up screw and its manufacture method |
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