CN203201941U - Improved self-tapping screw - Google Patents
Improved self-tapping screw Download PDFInfo
- Publication number
- CN203201941U CN203201941U CN 201320099785 CN201320099785U CN203201941U CN 203201941 U CN203201941 U CN 203201941U CN 201320099785 CN201320099785 CN 201320099785 CN 201320099785 U CN201320099785 U CN 201320099785U CN 203201941 U CN203201941 U CN 203201941U
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- CN
- China
- Prior art keywords
- screw
- nut
- diameter
- screw rod
- pad
- 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
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Abstract
The utility model discloses an improved self-tapping screw which comprises a nut and a screw rod. A gasket and an elastic piece are arranged between the nut and the screw rod. A thread is arranged on the screw rod, a cross-shaped groove is formed in the hexagonal nut, and the tail portion of the screw rod is a three-piece spiral tail wing. The improved self-tapping screw is better in cutting effect, the drilling process is easier, meanwhile, the improved self-tapping screw can be screwed by a spanner or a screwdriver, the gasket with concave-convex strips can increase the friction between the nut and an article, and the screw can be contacted with the article more closely and firmly through the elastic piece.
Description
Technical field
The utility model relates to the hardware field, is specifically related to a kind of self tapping screw.
Background technique
Existing screw is to utilize the inclined-plane circular rotating of object and physics and the mathematical principle of frictional force, the by easy stages instrument of fastening implements parts.Screw is industrial necessity indispensable in the daily life: such as the minimum screw of the uses such as photographic camera, glasses, clock and watch, electronics; The general screw of TV, electric product, musical instrument, furniture etc.; Then use large-scale screw, nut as for engineering, building, bridge, traffic tool, aircraft, electric car, automobile etc. then are large primary screw and use.Screw is in the industrial vital task of bearing, as long as exist industry on the earth, then the function of screw is forever important.Screw is the over the past thousands of years common invention in people's productive life, and according to application, it is human first invention.
Yet existing screw is in use because the bar of the head of screw and the screw rod between thread section directly greater than screw, so screw rod is to twist in the screw of not entering in thread, causes that screw is gapped with the assembling surface of contact, close-fitting not.Through rocking repeatedly, the axial and radial junction credit union of screw is loosening, and this fixedly is a fatal potential hazard for some key positions.
The model utility content
For the problems referred to above, the utility model aims to provide a kind of self tapping screw with fastening function.
For realizing this technical purpose, scheme of the present utility model is: a kind of modified model self tapping screw comprises nut, screw rod, be provided with a pad and a shell fragment between nut and the screw rod, be provided with screw thread on the screw rod, be provided with cross recess on the hex nut, screw rod tail is three helical empennages.
As preferably, described shell fragment is the spiral annular sheet metal in one week, and the diameter of shell fragment is less than nut, and ring diameter is greater than the diameter of screw thread in the shell fragment.
As preferably, described pad is the tinsel of thick 0.5-1mm, and the pad diameter is greater than the diameter of nut, and ring diameter is greater than the diameter of screw thread in the pad.
As preferably, be provided with concavo-convex of many rows below the pad.
The beneficial effects of the utility model, cutting effect is better, and the boring effect is easier, can tighten with spanner or screw-driver simultaneously, can increase the frictional force of screw cap and object with concavo-convex pad, and it is more closely firm that shell fragment can make screw and object remove.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of nut of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
As shown in Figure 1, 2, a kind of modified model self tapping screw comprises nut 1, screw rod 2.Be provided with a pad 3 and a shell fragment 4 between nut 1 and the screw rod 2, be provided with screw thread 8 on the screw rod 2, be provided with cross recess 6 on the hex nut 1, screw rod 2 afterbodys are three helical empennages 5.
Described shell fragment 4 is the spiral annular sheet metal in one week, and the diameter of shell fragment is slightly less than nut, and ring diameter is slightly larger than the diameter of screw thread in the shell fragment.
Described pad 3 is the tinsel of thick 0.5-1mm, and the pad diameter is greater than the diameter of nut, and ring diameter is slightly larger than the diameter of screw thread in the pad.
Be provided with concavo-convex 7 of many row below the pad 3.Can increase the frictional force of screw cap and object with concavo-convex pad.So that screw and object are fixing more tight.
The above; it only is preferred embodiment of the present utility model; not in order to limiting the utility model, any trickle modification that every foundation technical spirit of the present utility model is done above embodiment, be equal to and replace and improve, all should be included within the protection domain of technical solutions of the utility model.
Claims (4)
1. a modified model self tapping screw comprises nut, screw rod, it is characterized in that: be provided with a pad and a shell fragment between nut and the screw rod, be provided with screw thread on the screw rod, be provided with cross recess on the hex nut, screw rod tail is three helical empennages.
2. modified model self tapping screw according to claim 1, it is characterized in that: described shell fragment is the spiral annular sheet metal in one week, and the diameter of shell fragment is less than nut, and ring diameter is greater than the diameter of screw thread in the shell fragment.
3. modified model self tapping screw according to claim 1, it is characterized in that: described pad is the tinsel of thick 0.5-1mm, and the pad diameter is greater than the diameter of nut, and ring diameter is greater than the diameter of screw thread in the pad.
4. modified model self tapping screw according to claim 3 is characterized in that: be provided with concavo-convex of many rows below the pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320099785 CN203201941U (en) | 2013-03-04 | 2013-03-04 | Improved self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320099785 CN203201941U (en) | 2013-03-04 | 2013-03-04 | Improved self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203201941U true CN203201941U (en) | 2013-09-18 |
Family
ID=49146052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320099785 Expired - Fee Related CN203201941U (en) | 2013-03-04 | 2013-03-04 | Improved self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203201941U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122218A (en) * | 2016-08-23 | 2016-11-16 | 无锡市东赫金属制品有限公司 | A kind of headed self-tapping self-drilling screw nail easy to use |
| CN113294419A (en) * | 2020-11-27 | 2021-08-24 | 浙江斯泰新材料科技股份有限公司 | Fastener with open-loop type vibration absorption locking ring |
| CN113846643A (en) * | 2021-07-27 | 2021-12-28 | 北京市机械施工集团有限公司 | Method for reinforcing anchor rod steel waist beam and base plate |
-
2013
- 2013-03-04 CN CN 201320099785 patent/CN203201941U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122218A (en) * | 2016-08-23 | 2016-11-16 | 无锡市东赫金属制品有限公司 | A kind of headed self-tapping self-drilling screw nail easy to use |
| CN113294419A (en) * | 2020-11-27 | 2021-08-24 | 浙江斯泰新材料科技股份有限公司 | Fastener with open-loop type vibration absorption locking ring |
| CN113846643A (en) * | 2021-07-27 | 2021-12-28 | 北京市机械施工集团有限公司 | Method for reinforcing anchor rod steel waist beam and base plate |
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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 |
Granted publication date: 20130918 Termination date: 20140304 |