CN204610523U - Derotation backing-up screw - Google Patents
Derotation backing-up screw Download PDFInfo
- Publication number
- CN204610523U CN204610523U CN201520131725.4U CN201520131725U CN204610523U CN 204610523 U CN204610523 U CN 204610523U CN 201520131725 U CN201520131725 U CN 201520131725U CN 204610523 U CN204610523 U CN 204610523U
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- CN
- China
- Prior art keywords
- derotation
- screw
- dextrorotation
- threaded stem
- backing
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of derotation backing-up screw, relate to union piece technical field, comprise screw head and screw rod, screw rod comprises four sections from top to bottom, and first paragraph is derotation threaded stem, and second segment is smooth shaft, 3rd section is dextrorotation threaded stem, and the 4th section is nail tip; Derotation threaded stem is provided with derotation outside thread, and dextrorotation threaded stem and nail tip are equipped with dextrorotation outside thread, and the externally threaded pitch of derotation is less than the externally threaded pitch of dextrorotation, and derotation threaded stem length is less than dextrorotation threaded stem length; Screw of the present utility model is quincunx or interior hexagonal flower shape sunk screw.The utility model effectively can prevent screw loosening, rapidly laborsaving when being screwed into, and not easily defective work piece, workpiece configurations can be made smoothly attractive in appearance simultaneously, there is the effect improving decoration.
Description
Technical field
The utility model relates to union piece technical field.
Background technique
Screw is link very conventional in life, by rotating screw head, is pierced by screw in workpiece, makes screw and workpiece or by screw, multiple workpiece linked together, and plays and connects or fastening effect.Screw is divided into slotted screw and unslotted screw, and wherein slotted screw usually arbitrarily can remove or again embeddingly tightly and not damage its efficiency, also reusable.Common slotted screw is made up of screw head and screw rod, and the head dummy of screw head has socket cap, coiled hair, countersunk head and countersunk raised head several, and head flute profile is generally fluting (straight groove) or cross recess, and screw rod is provided with screw thread.The screw rod of plain screw is provided with the single start thread of continuous equidirectional, and the vibration of such screw easily with workpiece in Long-Time Service screws out automatically, produces and loosens, even there is potential safety hazard; Usually be provided with straight groove or cross recess at screw head, flute profile intensity is less more, stressed larger time easily twist bald; Needing the workpiece surface of certain decorative effect to have screw to expose in addition, simple straight groove or cruciform slot screw decorative effect poor.In a word, requiring that in the application that join strength is large, compact structure, profile are smoothly attractive in appearance, above-mentioned plain screw can have a strong impact on the use of workpiece.
Model utility content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, provides a kind of derotation backing-up screw, effectively can prevent screw loosening, rapidly laborsaving when being screwed into, and not easily defective work piece.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of derotation backing-up screw, comprises screw head and screw rod, screw rod comprises four sections from top to bottom, and first paragraph is derotation threaded stem, and second segment is smooth shaft, 3rd section is dextrorotation threaded stem, and the 4th section is nail tip; Derotation threaded stem is provided with derotation outside thread, and dextrorotation threaded stem and nail tip are equipped with dextrorotation outside thread; The externally threaded pitch of derotation is less than the externally threaded pitch of dextrorotation, and derotation threaded stem length is less than dextrorotation threaded stem length.
Preferably, derotation outside thread and the externally threaded tooth form of dextrorotation identical or different.
Preferably, derotation outside thread and the externally threaded tooth form of dextrorotation are triangle.
Preferably, the head dummy of screw head is countersunk head, and the end face of screw head is provided with groove.
Preferably, groove is quincunx groove or interior hexagonal flower shape groove.
Adopt the beneficial effect that produces of technique scheme to be: the derotation backing-up screw that the utility model provides, screw rod is provided with two sections of screw threads that rotation direction is contrary, when effectively preventing Workpiece vibration, screw automatically screws out along the screw thread in a direction and produces loosening; The length of derotation threaded stem and thread pitch all than the length of dextrorotation threaded stem and thread pitch little, make screw rapidly laborsaving when being screwed into, not easily defective work piece; The performance that V thread screw and screwed nail tip can make screw have Low-torque when being screwed into be screwed into; Screw head is quincunx or interior hexagonal flower shape countersunk head, and when executing stubborn, centering is good, and flute profile intensity is large, not easily twists bald, can apply larger screw-down torque, and head can be imbedded in workpiece, make workpiece configurations smoothly attractive in appearance, have the effect improving decoration.
Accompanying drawing explanation
Fig. 1 is plan view of the present utility model;
Fig. 2 is the plan view of Fig. 1 in embodiment 1;
Fig. 3 is the plan view of Fig. 1 in embodiment 2.
In figure: 1, screw head; 2, screw rod; 3, derotation threaded stem; 4, smooth shaft; 5, dextrorotation threaded stem; 6, nail tip.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1
A kind of derotation backing-up screw, as depicted in figs. 1 and 2, comprise screw head 1 and screw rod 2, be interior hexagonal flower shape sunk screw, screw rod 2 comprises left-handed thread bar 3, the smooth shaft 4 of second segment, the right-handed thread bar 5 of the 3rd section of first paragraph and is provided with the externally threaded nail tip 6 of dextrorotation.Screw rod 2 length is 25mm, and the length of left-handed thread bar 3 is 0.25 times of screw rod 2 overall length, and the length of smooth shaft 4 is 0.25 times of screw rod 2 overall length, is provided with the length of the externally threaded right-handed thread bar 5 of dextrorotation and nail tip 6 and is 0.5 times of screw rod 2 overall length.Two sections of externally threaded tooth forms are triangular tooth, and the pitch of sinistral external thread is 0.9mm, and the externally threaded pitch of dextrorotation is 1.3mm, and left-handed thread bar 3 is 3.5mm with the major diameter of thread on right-handed thread bar 5.
Embodiment 2
A kind of derotation backing-up screw, as shown in figures 1 and 3, comprise screw head 1 and screw rod 2, be quincunx sunk screw, further feature is identical with embodiment 1.
The threaded stem that two sections of rotation directions on screw rod are contrary also can be set to first paragraph be right-handed thread bar, the 3rd section for left-handed thread bar, nail tip is arranged left-handed thread, the screw thread of suitable rotation direction can be selected according to actual needs.
The derotation backing-up screw that the utility model provides, screw rod is provided with two sections of screw threads that rotation direction is contrary, and when effectively preventing Workpiece vibration, screw automatically screws out along the screw thread in a direction and produces loosening; The length of derotation threaded stem and thread pitch all than the length of dextrorotation threaded stem and thread pitch little, make screw rapidly laborsaving when being screwed into, not easily defective work piece; The performance that V thread screw and screwed nail tip can make screw have Low-torque when being screwed into be screwed into; Screw head is quincunx or interior hexagonal flower shape countersunk head, and when executing stubborn, centering is good, and flute profile intensity is large, not easily twist bald, and head can be imbedded in workpiece, makes workpiece configurations smoothly attractive in appearance, has good decorative effect.
Above technical characteristics constitutes most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease non-essential technical characteristics according to actual needs, meet the demand of different situations.
Claims (5)
1. a derotation backing-up screw, comprises screw head (1) and screw rod (2), it is characterized in that: described screw rod (2) comprises four sections from top to bottom, first paragraph is derotation threaded stem (3), second segment is smooth shaft (4), and the 3rd section is dextrorotation threaded stem (5), and the 4th section is nail tip (6); Described derotation threaded stem (3) is provided with derotation outside thread, and described dextrorotation threaded stem (5) and nail tip (6) are equipped with dextrorotation outside thread; The externally threaded pitch of described derotation is less than the externally threaded pitch of described dextrorotation, and described derotation threaded stem length is less than described dextrorotation threaded stem length.
2. derotation backing-up screw according to claim 1, it is characterized in that described derotation outside thread and the externally threaded tooth form of described dextrorotation identical or different.
3. derotation backing-up screw according to claim 2, is characterized in that described derotation outside thread and the externally threaded tooth form of described dextrorotation are triangle.
4. derotation backing-up screw according to claim 1, it is characterized in that the head dummy of described screw head (1) is countersunk head, the end face of screw head (1) is provided with groove.
5. derotation backing-up screw according to claim 4, is characterized in that described groove is quincunx groove or interior hexagonal flower shape groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520131725.4U CN204610523U (en) | 2015-03-09 | 2015-03-09 | Derotation backing-up screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520131725.4U CN204610523U (en) | 2015-03-09 | 2015-03-09 | Derotation backing-up screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610523U true CN204610523U (en) | 2015-09-02 |
Family
ID=53963093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520131725.4U Expired - Fee Related CN204610523U (en) | 2015-03-09 | 2015-03-09 | Derotation backing-up screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204610523U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468698A (en) * | 2018-06-26 | 2018-08-31 | 海盐县奕涵标准件厂 | A kind of hex bolts |
| CN109130467A (en) * | 2017-06-16 | 2019-01-04 | 日本梅克特隆株式会社 | Scraper scrapes knife plate holding tool, silk-screen printing device |
| CN111043126A (en) * | 2019-12-27 | 2020-04-21 | 嘉善永固五金制造有限公司 | Difficult not hard up straw rope screw |
-
2015
- 2015-03-09 CN CN201520131725.4U patent/CN204610523U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109130467A (en) * | 2017-06-16 | 2019-01-04 | 日本梅克特隆株式会社 | Scraper scrapes knife plate holding tool, silk-screen printing device |
| CN108468698A (en) * | 2018-06-26 | 2018-08-31 | 海盐县奕涵标准件厂 | A kind of hex bolts |
| CN111043126A (en) * | 2019-12-27 | 2020-04-21 | 嘉善永固五金制造有限公司 | Difficult not hard up straw rope screw |
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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: 20150902 Termination date: 20160309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |