CN204357883U - Space safety lock screw - Google Patents
Space safety lock screw Download PDFInfo
- Publication number
- CN204357883U CN204357883U CN201420869798.9U CN201420869798U CN204357883U CN 204357883 U CN204357883 U CN 204357883U CN 201420869798 U CN201420869798 U CN 201420869798U CN 204357883 U CN204357883 U CN 204357883U
- Authority
- CN
- China
- Prior art keywords
- screw
- section
- cap head
- safety lock
- screw rod
- 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
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model relates to aviation fasteners technical field, especially a kind of space safety lock screw, comprise the screw rod with central through bore, screw rod is entire body Full Thread FT, screw rod is divided into three sections, be respectively cap head section, intermediate section and self tapping section, the direction of spiral shell tooth along intermediate section to cap head section of cap head section screw thread reduces successively, cap head section is identical with the large footpath of the outside thread of self tapping section, intermediate section is less than the large footpath of outside thread of cap head end, aviation safety lock screw of the present utility model adopts entire body screw thread to increase firm contact face, the interference fit of screw two ends and tapped hole is adopted to carry out lock screw, if there is toner screw or loose-parts in aircraft, screw there are three self tapping grooves can quick mounting, the utility model can make Safe screw be locked on part, safe and reliable, can be used for the place of bad environments, successful.
Description
Technical field
The utility model relates to aviation fasteners technical field, especially a kind of space safety lock screw.
Background technique
A thousand li dyke is destroyed in ant cave, safety is the lifeline of airline, any screw all carries the great trust of life, a slight screw loosening or come off and all likely cause catastrophic consequence, the particularly position of the main load-carrying member of aircraft, screw skew is installed, stressed abnormal, screw thread face is contaminated or damage, the position of causing screw thread self coefficient of sliding resistance to reduce and to install is in severe state, such as vibrations etc. all can cause loosening and coming off of screw, position on aircraft is many is all connect by screw, the attachment screw of airplane engine position related accessory, due to the strenuous vibration of motor, environment very severe, screw there will be loosening, therefore the safety of screw to aircraft is vital, when some are urgent, due to loosening of certain accessory on certain aircraft, traditional screw can not be fastening by it fast, danger situation is caused not solve in time.
Model utility content
The technical problems to be solved in the utility model is: in order to overcome screw loosening, to come off and can not the problem of quick mounting in time under dangerous situation, a kind of space safety lock screw is now provided.
The utility model solves the technological scheme that its technical problem adopts: a kind of space safety lock screw, comprise the screw rod with central through bore, described screw rod is entire body Full Thread FT, entire body Full Thread FT can enlarge active surface, firm contact face is larger, described screw rod is divided into three sections, be respectively cap head section, intermediate section and self tapping section, the direction of spiral shell tooth along intermediate section to cap head section of described cap head section screw thread reduces successively, can screw easily when screwing, and difficult drop-off, described cap head section is identical with the large footpath of the outside thread of self tapping section, described intermediate section is less than the large footpath of outside thread of cap head section, tapped hole on link is equal with the large footpath of the outside thread of intermediate section, be convenient to the installation of screw, the large footpath of outside thread of cap head section and self tapping section is greater than the tapped hole internal diameter on link, screw lock can be made to fix on link by interference fit, adopts afterburning press-in or rising-heat contracting-cold method to load when assembling.
Further, one end of described screw rod is provided with counter sink, the other end is provided with three can be divided into three cutting edges by screw rod end portion by reaming type self tapping groove, described counter sink is communicated with central through bore, and three self tapping grooves, can direct self tapping without the need to bullport, superstructure loosening is run in aircraft flight, related personnel can install fixing rapidly, the design of central through bore, can be used for ventilation, logical oil and threading aboard.
Further, described self tapping section connects with arc transition from cutting edge to this part of spiral shell tooth, greatly can improve the self of screw when self tapping, avoids drawing when self tapping partially and is conducive to chip removal, avoiding chip friction.
Further, the tooth form of the screw thread of described intermediate section is trapezoidal, and trapezoidal sound of baby talk root intensity is high to be not easy to damage in the violent place of vibrations.
Further, the outer side surface of the spiral shell tooth of outermost one circle of one end that described screw rod is relative with counter sink is arc surface, reduces the damage of the double thread self when self tapping.
Preferably, the large footpath of the outside thread of described intermediate section is less than the large footpath 0.1mm of outside thread of cap head section.
Preferably, the material of described screw rod is titanium alloy, and titanium alloy quality gently and not easily corrosion.
The beneficial effects of the utility model are: aviation safety lock screw of the present utility model adopts entire body screw thread to increase firm contact face, the interference fit of screw two ends and tapped hole is adopted to carry out lock screw, if there is toner screw or loose-parts in aircraft, screw there are three self tapping grooves can quick mounting, the utility model can make Safe screw be locked on part, safe and reliable, can be used for the place of bad environments, successful.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the schematic three dimensional views of self tapping section.
In figure: 1, counter sink, 2, cap head section, 3, intermediate section, 4, central through bore, 5, self tapping section, 6, spiral shell tooth, 7, cutting edge.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
Embodiment 1
Concrete utilization is in the connection of airplane engine related accessory, and airplane engine vibrations are violent.
A kind of space safety lock screw as shown in Figure 1, comprise the screw rod with central through bore 4, screw rod is entire body Full Thread FT, screw rod is divided into three sections, be respectively cap head section 2, intermediate section 3 and self tapping section 5, the direction of spiral shell tooth 6 along intermediate section 3 to cap head section 2 of cap head section 2 screw thread reduces successively, and cap head section 2 is identical with the large footpath of the outside thread of self tapping section 5, and described intermediate section 3 is less than the large footpath 0.1mm of outside thread of cap head section 2.
As shown in Figure 1, one end of screw rod is provided with counter sink 1, and the other end is provided with three can be divided into three spiral shell teeth 6 by screw rod end portion by reaming type self tapping groove, and counter sink 1 is communicated with central through bore 4.
As shown in Figure 2, self tapping section 5 connects from this part of cutting edge 7 to spiral shell tooth 6 with arc transition.
The tooth form of the screw thread of intermediate section 3 is trapezoidal.
The outer side surface of the spiral shell tooth 6 that screw rod and counter sink 1 opposite side outermost one enclose is arc surface.
The material selection titanium alloy of screw rod.
Concrete installation: the large footpath of outside thread of cap head section 2 and self tapping section 5 is greater than the tapped hole internal diameter on link, can make screw lock fix on link by interference fit, adopts afterburning press-in or rising-heat contracting-cold method to load when assembling.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this model utility technological thought, can carry out various change and amendment completely.The technical scope of this model utility is not limited to the content on specification, must determine its technical scope according to right.
Claims (7)
1. a space safety lock screw, comprise the screw rod with central through bore (4), it is characterized in that: described screw rod is entire body Full Thread FT, described screw rod is divided into three sections, be respectively cap head section (2), intermediate section (3) and self tapping section (5), the direction of spiral shell tooth (6) along intermediate section (3) to cap head section (2) of described cap head section (2) screw thread reduces successively, described cap head section (2) is identical with the large footpath of outside thread of self tapping section (5), and described intermediate section (3) is less than the large footpath of outside thread of cap head end (2).
2. space safety lock screw according to claim 1, it is characterized in that: one end of described screw rod is provided with counter sink (1), the other end is provided with three can be divided into three cutting edges (7) by reaming type self tapping groove by screw rod end portion, described counter sink (1) is communicated with central through bore (4).
3. space safety lock screw according to claim 2, is characterized in that: described self tapping section (5) connects with arc transition from cutting edge (7) to spiral shell tooth (6) this part.
4. space safety lock screw according to claim 3, is characterized in that: the tooth form of the screw thread of described intermediate section (3) is trapezoidal.
5. space safety lock screw according to claim 4, is characterized in that: the outer side surface that described screw rod and counter sink (1) opposite side outermost one enclose spiral shell tooth (6) is arc surface.
6. space safety lock screw according to claim 5, is characterized in that: the large footpath of outside thread of described intermediate section (3) is less than the large footpath 0.1mm of outside thread of cap head section (2).
7. space safety lock screw according to claim 6, is characterized in that: the material of described screw rod is titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869798.9U CN204357883U (en) | 2014-12-31 | 2014-12-31 | Space safety lock screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869798.9U CN204357883U (en) | 2014-12-31 | 2014-12-31 | Space safety lock screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204357883U true CN204357883U (en) | 2015-05-27 |
Family
ID=53259356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420869798.9U Expired - Fee Related CN204357883U (en) | 2014-12-31 | 2014-12-31 | Space safety lock screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204357883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032168A (en) * | 2020-08-28 | 2020-12-04 | 浙江全友标准件股份有限公司 | Self-tapping screw |
-
2014
- 2014-12-31 CN CN201420869798.9U patent/CN204357883U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032168A (en) * | 2020-08-28 | 2020-12-04 | 浙江全友标准件股份有限公司 | Self-tapping screw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX2009006741A (en) | Threaded connection with perturbed flanks. | |
| CN110985516A (en) | Anti-loose bolt and nut | |
| WO2015095039A3 (en) | Threaded connection | |
| WO2014007882A3 (en) | Thread load distribution | |
| CN110439906B (en) | Effective anti-loosening clamping type self-locking nut | |
| CN204357883U (en) | Space safety lock screw | |
| CN107237805A (en) | A kind of bolt | |
| CN108612729A (en) | Multi-functional anti-loosening bolt and nut | |
| JP3206288U (en) | R type screw | |
| CN204357881U (en) | Aviation has the fastening screw trip bolt of insurance function | |
| CN203835917U (en) | Triangular self-tapping locking screw | |
| CN211820309U (en) | Anti-loosening bolt | |
| CN204284164U (en) | Bolt anticreep locking mechanism | |
| CN103498865A (en) | Length-adjustable pull rod assembly | |
| CN203570743U (en) | Piston and piston rod connecting structure capable of preventing piston rod from breaking | |
| CN203476240U (en) | Oil drill stem female joint with root stress groove threads | |
| CN209115553U (en) | A kind of propeller boss coupling arrangement | |
| CN207122484U (en) | A kind of torsional shear type bolt auxiliary connection | |
| CN207212912U (en) | A kind of anti-reverse bolt | |
| CN204942228U (en) | A kind of blind hole guiding self-locking screw connection part | |
| CN211343646U (en) | Cap-shaped nut | |
| CN202580385U (en) | Self-locking reinforced double-steel-wire hoop | |
| CN110332199A (en) | A kind of screw | |
| CN212455167U (en) | Never-loosening screw combination | |
| CN209724931U (en) | Anti-off bolt structure |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20181231 |