CN202056161U - Countersunk self-tapping screw - Google Patents
Countersunk self-tapping screw Download PDFInfo
- Publication number
- CN202056161U CN202056161U CN2011201493718U CN201120149371U CN202056161U CN 202056161 U CN202056161 U CN 202056161U CN 2011201493718 U CN2011201493718 U CN 2011201493718U CN 201120149371 U CN201120149371 U CN 201120149371U CN 202056161 U CN202056161 U CN 202056161U
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- China
- Prior art keywords
- screw
- thread
- workpiece
- nut
- screw nut
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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.)
- Expired - Fee Related
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Abstract
The utility model discloses a countersunk self-tapping screw, which includes a screw rod and a screw nut, wherein a spiral thread is formed on the screw rod; the screw nut adopts a countersunk screw nut structure with an inverted trapezium-shaped cross section; the thread flank of the thread facing to the nailhead of the screw rod is an inclined surface convenient for screwing in; an inclined angle smaller than 90 DEG is formed between the inclined surface and the axis of the screw; and the thread flank of the thread facing to the screw nut is vertical to the axis of the screw. The adopted thread flanks with different angles on one hand facilitate the screwing in of the screw, and on the other hand can effectively prevent the screw from backing off due to the loosening of the screw, therefore the countersunk self-tapping screw is firm and reliable and is safe to use; as the screw nut adopts the countersunk screw nut structure with the inverted trapezium-shaped cross section, and the screw nut is combined with a countersunk hole pre-formed on a workpiece to fix the workpiece, the top end of the mounted screw nut is not higher than the surface of the workpiece, and the influence on the use of the workpiece is avoided.
Description
Technical field
The utility model relates to a kind of screw, relates in particular to a kind of countersunk head tapping screw.
Background technique
At present, existing tapping screw includes nut and screw rod, has in-line on its nut or cross is begun to speak, and be convenient to install, but its nut generally all has certain thickness, may cause interference to the use of some objects after the installation; Have screw thread on its screw rod, its screw thread shape in the shape of a spiral is distributed on the screw rod, during installation, screw is rotated towards same direction, screw can be screwed in the object, so that related item is installed.And existing screw thread, its cross section generally is triangular shape, and the flank of thread shape that contacts with object when its screw thread was oppositely back-outed with screw with the flank of thread of object contact when promptly screw was screwed into object is consistent.On the workpiece in some special places, because indefinite rocking or shaking, screw on this workpiece is owing to have the tilt angle between the surface of contact of screw thread and workpiece, and screw is easy to be subjected to the influence of the motoricity of workpiece own and becomes flexible and promptly retreat even come off, thereby brings unsafe hidden danger.
The model utility content
At the problem that above-mentioned prior art exists, the utility model purpose is to provide a kind of countersunk head tapping screw, is not easy loosening retreating, and can effectively solve the loosening easily even technical problem such as come off of existing screw.
The technical solution of the utility model is: a kind of countersunk head tapping screw, comprise screw rod and nut, has spiral helicine screw thread on the described screw rod, described nut adopts section for being inverted trapezoidal countersunk head nut structure, described screw thread is towards the plane of inclination of flank of thread for ease of being screwed into of the ailhead direction of screw rod, and has tilt angle between the screw axis, towards the flank of thread means of vertical screws axis of screw cap direction less than 90 degree.
As preferably, described tilt angle is the 30-60 degree.
The beneficial effects of the utility model are: owing to adopt the flank of thread of different amount, help being screwed into of screw on the one hand, can prevent effectively again that on the other hand screw from retreating because of loosening, have functions such as firm, reliable and safe in utilization, nut adopts section for being inverted trapezoidal countersunk head nut structure, cooperate the counter sink of holding successfully in advance on the workpiece during fixation workpiece, make the top of mounted nut not be higher than the surface of workpiece, thereby avoid the use of workpiece is impacted.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As a kind of mode of execution of the present utility model, as shown in Figure 1, a kind of countersunk head tapping screw, comprise screw rod 2 and nut 1, have spiral helicine screw thread on the described screw rod 2, described nut 1 adopts section for being inverted trapezoidal countersunk head nut structure, and described screw thread is towards the plane of inclination of flank of thread for ease of being screwed into of the ailhead direction of screw rod 2, and the tilt angle that has the 30-60 degree between the screw axis is towards the flank of thread means of vertical screws axis of screw cap direction.
The utility model is owing to adopt the flank of thread of different amount, help being screwed into of screw on the one hand, can prevent effectively again that on the other hand screw from retreating because of loosening, have functions such as firm, reliable and safe in utilization, nut 1 adopts section for being inverted trapezoidal countersunk head nut structure, cooperate the counter sink of holding successfully in advance on the workpiece during fixation workpiece, make the top of mounted nut 1 not be higher than the surface of workpiece, thereby avoid the use of workpiece is impacted.
Claims (2)
1. countersunk head tapping screw, comprise screw rod and nut, has spiral helicine screw thread on the described screw rod, it is characterized in that: described nut adopts section for being inverted trapezoidal countersunk head nut structure, described screw thread is towards the plane of inclination of flank of thread for ease of being screwed into of the ailhead direction of screw rod, and has tilt angle between the screw axis, towards the flank of thread means of vertical screws axis of screw cap direction less than 90 degree.
2. countersunk head tapping screw according to claim 1 is characterized in that: described tilt angle is the 30-60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201493718U CN202056161U (en) | 2011-04-29 | 2011-04-29 | Countersunk self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201493718U CN202056161U (en) | 2011-04-29 | 2011-04-29 | Countersunk self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202056161U true CN202056161U (en) | 2011-11-30 |
Family
ID=45016132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201493718U Expired - Fee Related CN202056161U (en) | 2011-04-29 | 2011-04-29 | Countersunk self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202056161U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327468A (en) * | 2017-06-30 | 2017-11-07 | 共享装备股份有限公司 | Self-locking thread and junction of the edges of two sheets of paper connection method |
-
2011
- 2011-04-29 CN CN2011201493718U patent/CN202056161U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327468A (en) * | 2017-06-30 | 2017-11-07 | 共享装备股份有限公司 | Self-locking thread and junction of the edges of two sheets of paper connection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20120429 |