CN207005037U - Two sharp formula spiral expansion nails - Google Patents
Two sharp formula spiral expansion nails Download PDFInfo
- Publication number
- CN207005037U CN207005037U CN201720885600.XU CN201720885600U CN207005037U CN 207005037 U CN207005037 U CN 207005037U CN 201720885600 U CN201720885600 U CN 201720885600U CN 207005037 U CN207005037 U CN 207005037U
- Authority
- CN
- China
- Prior art keywords
- screw
- external diameter
- point
- formula spiral
- screw body
- 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
- Dowels (AREA)
Abstract
A kind of machine components are the utility model is related to, especially the sharp formula spiral expansion nail of one kind two.Including screw body, one through hole is set along axis direction in screw body, the head of the screw body is provided with a pair of screw points, and screw point is located at the both sides of through hole respectively, for screw afterbody to two threaded lines are provided between two screw points, the external diameter of the threaded line is unequal.The features such as the utility model has simple in construction, effectively avoids board cracking, and bonding strength is secure, and the service life of furniture is longer.
Description
Technical field
A kind of machine components are the utility model is related to, especially the sharp formula spiral expansion nail of one kind two.
Background technology
Existing carpenter's screw mostly uses normal screws, these screws when being squeezed into automated tool in wood furniture,
The problem of in the presence of that can destroy timber, cause board cracking etc. to influence furniture quality.The bonding strength between timber can be not only influenceed,
And board cracking can also cause furniture to damage in various degree, even result in furniture and scrap, have a strong impact on making for wood furniture
Use the life-span.
Utility model content
The utility model is mainly for complicated present in prior art, and panel is easy to crack, and bonding strength is weaker, family
Have the technical problems such as physical life is shorter, there is provided it is a kind of simple in construction, board cracking is effectively avoided, bonding strength is secure, family
The two sharp formula spiral expansions that the service life of tool is longer are followed closely.
To achieve the above object, the utility model employs following technical scheme：
Two sharp formula spiral expansion nails include screw body, and screw body is interior to set a through hole along axis direction, described
The head of screw body is provided with a pair of screws point, and screw point is located at the both sides of through hole respectively, screw afterbody to two screw points
Between be provided with two threaded lines, the external diameter of the threaded line is unequal.
When screw body is shot in wooden or cementaceous material, a pair of screw points strengthen feeding wedging when rotated
Power, continuous cutting material alternate with each other shoot screw body more labour-saving, and material bits are discharged out of through hole.
Preferably, the ratio between the less threaded line of screw body, external diameter and the larger external diameter of threaded line of external diameter are：6:8:
9。
Pointed to by setting two threaded lines, and in screw point on the direction of screw terminal, threaded line external diameter is gradually increased
Rule set, when carpenter's screw shoots panel, the less threaded line of external diameter first shoots panel reaming, and then external diameter is larger
Threaded line is shot in panel on this basis again, can effectively reduce resistance, prevents board cracking, while the screw thread that external diameter is larger
Line also ensures bonding strength, and then improves the service life of furniture.
Preferably, axis of the screw point along the screw body outwards dissipates, the angle of screw point and axis is 5 °-
15°。
When screw body is shot in wooden or cementaceous material, because the minute angle between screw point and axis is deposited
, the head of whole screw is become roomy, and screw body opposing headers are narrow；In this way, screw body can stronger wedge
Enter and be difficult to come off in the material.
Preferably, screw point is cone angle, the angle of cone angle is 20 ° -30 °.
The cone angle of screw point increases wedging material to screw head and cuts the ability of material.
To sum up, the utility model has simple in construction, effectively avoids board cracking, and bonding strength is secure, and furniture makes
The features such as with lasting a long time.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment；
Fig. 2 is schematic cross-sectional view of the present utility model.
Description of reference numerals：1- screw bodies, 2- through holes, 3- screws point, 4- screw afterbodys, 5- threaded lines.
Embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched with reference to embodiment
State, but it is to be understood that these descriptions are simply further explanation feature and advantage of the present utility model, rather than to this practicality
The limitation of new claim.
The sharp formula spiral expansion nail of one kind two is present embodiments provided, as shown in figure 1 and 2, including screw body 1, screw
One through hole 2 is set along axis direction in body 1, the head of screw body 1 is provided with a pair of screw points 3, and screw point 3 distinguishes position
In the both sides of through hole 2, two threaded lines 5 are provided between 4 to two screw points 3 of screw afterbody, the external diameters of two threaded lines 5 not phase
Deng.
The external diameter of the less threaded line 5 of external diameter, external diameter of screw body 1, the external diameter of the larger threaded line 5 of external diameter, three
The ratio between external diameter size is：6:8:9.
Axis of the screw point 3 along the screw body 1 outwards dissipates, and the angle of screw point 3 and axis is 5 °.
Screw point 3 is cone angle, and the angle of cone angle is 25 °.
The explanation of above example is only intended to help and understands method and its core concept of the present utility model.It should refer to
Go out, for those skilled in the art, can also be to this on the premise of the utility model principle is not departed from
Utility model carries out some improvement and modification, and these are improved and modification also falls into the protection domain of the utility model claims
It is interior.
Claims (4)
1. the sharp formula spiral expansion nail of one kind two, it is characterised in that：Including screw body（1）, screw body（1）It is interior along axis side
To one through hole of setting（2）, the screw body（1）Head be provided with a pair of screws point（3）, screw point（3）Respectively positioned at logical
Hole（2）Both sides, screw afterbody（4）To two screw points（3）Between be provided with two threaded lines（5）, the threaded line（5）It is outer
Footpath is unequal.
2. two sharp formula spiral expansion nail according to claim 1, it is characterised in that：The screw body（1）, external diameter it is smaller
Threaded line（5）The larger threaded line with external diameter（5）The ratio between external diameter be：6:8:9.
3. two sharp formula spiral expansion nail according to claim 1 or 2, it is characterised in that：The screw point（3）Along the spiral shell
Follow closely body（1）Axis outwards dissipate, screw point（3）Angle with axis is 5 ° -15 °.
4. two sharp formula spiral expansion nail according to claim 1 or 2, it is characterised in that：The screw point（3）For cone angle,
The angle of cone angle is 20 ° -30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720885600.XU CN207005037U (en) | 2017-07-20 | 2017-07-20 | Two sharp formula spiral expansion nails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720885600.XU CN207005037U (en) | 2017-07-20 | 2017-07-20 | Two sharp formula spiral expansion nails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207005037U true CN207005037U (en) | 2018-02-13 |
Family
ID=61455427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720885600.XU Expired - Fee Related CN207005037U (en) | 2017-07-20 | 2017-07-20 | Two sharp formula spiral expansion nails |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207005037U (en) |
-
2017
- 2017-07-20 CN CN201720885600.XU patent/CN207005037U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207005037U (en) | Two sharp formula spiral expansion nails | |
| CN206175430U (en) | Cross recess coiled hair is from boring self -tapping screw new construction | |
| CN203578868U (en) | Improved drill bit with long-short chip discharging groove structure | |
| CN201372995Y (en) | Drill tail screw structure | |
| CN201687825U (en) | Self-drilling screw | |
| CN101985953A (en) | Screw | |
| CN202291669U (en) | Three-level stepped reamer | |
| CN207647940U (en) | A kind of self drilling tapping screw | |
| TWM507469U (en) | Improved structure of a wood screw | |
| CA2708419C (en) | Crack-proof screw | |
| CN206028818U (en) | Drill | |
| CN204398014U (en) | Sky cutter got by a kind of spiral | |
| CN204867563U (en) | Three -wing bit | |
| CN204894138U (en) | Eccentric cut nail sieve bores | |
| CN203227887U (en) | Small-aperture hole saw | |
| CN207026554U (en) | Cable drill | |
| CN204312495U (en) | A kind of screw of wood furniture | |
| CN203879884U (en) | Wood screw | |
| CN204449428U (en) | Chip-removal drill bit in a kind of | |
| CN205851936U (en) | A kind of Novel auger bit | |
| EP2149717A2 (en) | Self-drilling screw | |
| CN208845545U (en) | Tip HIGH LOW SCREWS | |
| CN201231355Y (en) | Cutter | |
| CN210614439U (en) | Golf cleaning knife | |
| CN203030988U (en) | Step drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180213 Termination date: 20210720 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |