CN204610496U - Two screw thread tapping screw - Google Patents
Two screw thread tapping screw Download PDFInfo
- Publication number
- CN204610496U CN204610496U CN201520137058.0U CN201520137058U CN204610496U CN 204610496 U CN204610496 U CN 204610496U CN 201520137058 U CN201520137058 U CN 201520137058U CN 204610496 U CN204610496 U CN 204610496U
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- Prior art keywords
- thread
- screw
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- main
- pair
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of two screw thread tapping screw, belong to technical field of fastening.Described pair of screw thread tapping screw, comprise screw head, screw tip and screw rod, it is characterized in that described screw rod is provided with double-start thread, divide main thread and deputy thread, the start position of main thread and deputy thread is symmetrical on axial same cross section, main thread is all identical with lead angle with the pitch of the threaded line of deputy thread, and the tooth height of deputy thread is high in the tooth of main thread.The described in the utility model pair of screw thread tapping screw have screw in laborsaving, connect fastening, that soundness is high, locking property is good feature, even if screw also there will not be loosening, obscission through frequent vibration after a period of time after screwing in.
Description
Technical field
The utility model relates to technical field of fastening.
Background technique
Fastening piece be fastening two or more parts (or component) be fastenedly connected become one overall time the general name of class mechanical parts that adopts, be widely used in above various machinery, equipment, vehicle, boats and ships, railway, bridge, building, structure, instrument, instrument, chemical industry, instrument and articles for use etc., its feature is that description is various, performance purposes is different, and standardization, seriation, unitized degree are also high.
Screw is a kind of the most frequently used fastening part, as the structural member in conjunction with arbitrary equipment mechanism and be widely used, can be good at playing the effect of connection, fixing, adjustment according to the structural feature of himself.At present, when needing object to be fixed to the fixture such as body of wall, plank in mechanical engineering field, need to give larger torque to screw, general manually or electronic mode give the torque needed for it to screw, the squeezing action of the fixture such as body of wall, plank chip is subject to when fastening screw trip bolt screws in, the moment of torsion dynamics needed can be increasing, when needing fastening screw radical object that is more or fastening screw trip bolt harder, needs to consume very large muscle power or very large electric power.
The screw thread of existing screw is generally single start thread structure, after screwing object, when being subject to violent frequent vibration, fastening screw there will be loosening, serious also there will be obscission, if screw is when being used on vibration or the machine that rotates, screw loosening, coming off can causing trouble, even can cause safety problem.Chip when screw screws in addition is filled between screw and fixed object, makes connection fastening not, and the soundness of connection reduces, and locking property is poor, and screw is through also there will be loosening, obscission after a period of time.
Application number be 201320739090.7 Chinese patent disclose a kind of quick attack, anti-loosening stud bolt, it is provided with the circular partition of a circle in the centre of screw body, partition wherein side be just tooth outside thread; The diameter of described partition is greater than major diameter of external thread.The fixing parts at stud bolt two ends, by the design of partition, can separate, prevent from use interacting by this model utility, by the outside thread design that one end is height tooth, improve the speed of shooting, increase area of contact, enhance in conjunction with dynamics, fixed, difficult drop-off.But it is that in main equipment installation accessories, one end is screwed into main body that the stud bolt of this model utility is generally applied in main body, install another end band upper cap nut after annex.Its production technology is more complicated, and cost is higher, and the installation not being suitable for small item is fixed, and using scope is extensive not.
Application number be 201320347399.1 Chinese patent disclose the bolt of a kind of pair of worm structure, it is provided with the first screw thread and the second screw thread on bolt body, wherein the first screw thread and the parallel irregular setting of the second screw thread, and the pitch of the first screw thread and the second screw thread and thread angle all identical, both height of threads are different.The screw thread that this model utility to some extent solves existing bolt is more single, when being subject to producing resonance under high vibration or particular frequencies, bolt there will be the technology drawback of rotating the phenomenon that gets loose, but the double-start thread of this model utility does not extend to below screw head, one section is had without threaded area between screw thread starting point and screw head, this screw and object in conjunction with defective tightness, the soundness connected reduces, and locking property is still inadequate.
Application number be 201020678652.8 Chinese patent disclose a kind of front end low double-thread spiral type double-thread anchoring screw, its screw rod is provided with two-wire Thread Forming TF, at the low Thread Forming TF of the two-wire being provided with 1 ~ 2 helical pitch foremost of screw rod, the thread depth of the low Thread Forming TF of two-wire is lower than the two-wire Thread Forming TF at its rear portion, in 1 ~ 4 helical pitch of screw rod tail end, wherein screw thread nature transition in two-wire Thread Forming TF is retaining thread, the thread depth of retaining thread is lower than the thread depth of two-wire Thread Forming TF, and the transition of the two-wire Thread Forming TF of the low Thread Forming TF of two-wire and its rear end nature, both pitch is all consistent with helical pitch.The screw thread of two-wire can increase screw rod and the associativity being threaded object of holing, and improves its self-lock ability, increases the ability that screw rod bears shearing force.But this model utility is only in 1 ~ 4 helical pitch of screw rod tail end, wherein screw thread nature transition in two-wire Thread Forming TF is retaining thread, although the difficulty of tapping boring can be reduced, but defective tightness combines, and this screw thread does not extend to screw head, in addition this screw is also provided with pad at screw head place, and preparation process is more complicated, and cost is higher.
Model utility content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, a kind of two screw thread tapping screw is provided, this screw have screw in laborsaving, connect fastening, that soundness is high, locking property is good feature, even if screw also there will not be loosening, obscission through frequent vibration after a period of time after screwing in.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: provide a kind of two screw thread tapping screw, comprise screw head, screw tip and screw rod, it is characterized in that described screw rod is provided with double-start thread, divide main thread and deputy thread, the start position of main thread and deputy thread is symmetrical on axial same cross section, and main thread is all identical with lead angle with the pitch of the threaded line of deputy thread, and the tooth height of deputy thread is high in the tooth of main thread.
As preferably, the screw head of described pair of screw thread tapping screw is tack, round end or countersunk head.
As preferably, the main thread of described pair of screw thread tapping screw or the thread profile of deputy thread are triangle, rectangle, trapezoidal, circular arc or zigzag fashion.
As preferably, the main thread of described pair of screw thread tapping screw or the thread profile of deputy thread different.
As preferably, the thread profile of the main thread of described pair of screw thread tapping screw is triangle, and the thread profile of deputy thread is trapezoidal.
The beneficial effect adopting technique scheme to produce is: the chip produced when object shot by screw by of the present utility model pair of worm structure is filled in the gap between the screw thread of screw and solid objects, because main thread is high different with the tooth of deputy thread, deputy thread between each main thread is low, the torsion that effective removal screw brings when shooting object strengthens problem, screw is more easily attacked and needs fixing interior of articles, improve the speed of shooting, increase area of contact, enhance in conjunction with dynamics, with attacked direct intimate and be combined, soundness is high, locking property is good, torsion is large, the object frequent vibration even if be fixed, screw is difficult drop-off also, fastening effect is good.
In addition, the deputy thread of the two screw thread tapping screw of the utility model is arranged in the middle of the screw thread of main thread, on screw thread, any point increases along circle moved axial distance and helical pitch of same helix, under the same diameter of thread, more great-lift angle is larger for helical pitch, rotate faster more smooth, resistance is less, and time saving and energy saving, adds fast again than the locking speed of regular screw threads.
The two screw thread tapping screw structure of the utility model is simple, use safety, convenience, manufacture cost are lower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1, screw head; 2, screw rod; 3, main thread; 4, deputy thread; 5, screw tip.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model discloses a kind of two screw thread tapping screw, comprise screw head 1, screw tip 5 and screw rod 2, it is characterized in that described screw rod 2 is provided with double-start thread, divide main thread 3 and deputy thread 4, the start position of main thread 3 and deputy thread 4 is symmetrical on axial same cross section, main thread 3 is all identical with lead angle with the pitch of the threaded line of deputy thread 4, and the tooth height of deputy thread 4 is high in the tooth of main thread 3.Screw head 1 is tack, and the thread profile of main thread 3 is triangle, and the thread profile of deputy thread 4 is trapezoidal.
By adopting technique scheme, the chip produced when using of the present utility model pair of screw thread tapping screw to shoot object is filled in the gap between the screw thread of screw and solid objects, because main thread 3 is high different with the tooth of deputy thread 4, the high height of the tooth than main thread 3 of tooth of deputy thread 4, the torsion that effective removal screw brings when shooting object strengthens problem, screw is more easily attacked and needs fixing interior of articles, improve the speed of shooting, increase area of contact, enhance in conjunction with dynamics, with attacked direct intimate and be combined, soundness is high, locking property is good, the object frequent vibration even if be fixed, screw is difficult drop-off also, fastening effect is good.
In addition, the deputy thread 4 of the two screw thread tapping screw of the utility model is arranged in the middle of the screw thread of main thread 3, on screw thread, any point increases along circle moved axial distance and helical pitch of same helix, under the same diameter of thread, more great-lift angle is larger for helical pitch, rotate faster more smooth, resistance is less, and time saving and energy saving, adds fast again than the locking speed of regular screw threads.
Claims (5)
1. a two screw thread tapping screw, comprise screw head (1), screw tip (5) and screw rod (2), it is characterized in that described screw rod (2) is provided with double-start thread, divide main thread (3) and deputy thread (4), the start position of main thread (3) and deputy thread (4) is symmetrical on axial same cross section, main thread (3) is all identical with lead angle with the pitch of the threaded line of deputy thread (4), and the tooth height of deputy thread (4) is high in the tooth of main thread (3).
2. according to claim 1 pair of screw thread tapping screw, is characterized in that the screw head (1) of described pair of screw thread tapping screw is tack, round end or countersunk head.
3. according to claim 1 pair of screw thread tapping screw, is characterized in that the main thread (3) of described pair of screw thread tapping screw or the thread profile of deputy thread (4) are triangle, rectangle, trapezoidal, circular arc or zigzag fashion.
4. according to claim 1 pair of screw thread tapping screw, is characterized in that the main thread (3) of described pair of screw thread tapping screw or the thread profile difference of deputy thread (4).
5. according to claim 3 pair of screw thread tapping screw, it is characterized in that the thread profile of the main thread (3) of described pair of screw thread tapping screw is triangle, the thread profile of deputy thread (4) is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520137058.0U CN204610496U (en) | 2015-03-11 | 2015-03-11 | Two screw thread tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520137058.0U CN204610496U (en) | 2015-03-11 | 2015-03-11 | Two screw thread tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610496U true CN204610496U (en) | 2015-09-02 |
Family
ID=53963065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520137058.0U Expired - Fee Related CN204610496U (en) | 2015-03-11 | 2015-03-11 | Two screw thread tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204610496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848502A (en) * | 2017-03-06 | 2017-06-13 | 广东通宇通讯股份有限公司 | Wave filter and its coupling structure of filter and coupling screws |
-
2015
- 2015-03-11 CN CN201520137058.0U patent/CN204610496U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848502A (en) * | 2017-03-06 | 2017-06-13 | 广东通宇通讯股份有限公司 | Wave filter and its coupling structure of filter and coupling screws |
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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: 20160311 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |