CN1295444C - Screw with plural helical angle thread and mould for making same - Google Patents
Screw with plural helical angle thread and mould for making same Download PDFInfo
- Publication number
- CN1295444C CN1295444C CNB2004100022929A CN200410002292A CN1295444C CN 1295444 C CN1295444 C CN 1295444C CN B2004100022929 A CNB2004100022929 A CN B2004100022929A CN 200410002292 A CN200410002292 A CN 200410002292A CN 1295444 C CN1295444 C CN 1295444C
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- screw
- screw thread
- helix angle
- mould
- valley gutter
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Abstract
The present invention relates to a screw having a plurality of helix angle threads and a mould for forming the screw. The screw mainly comprises first screw threads forming a continuous first helix angle theta 1 at the outer surface of the screw and second screw threads forming at least one second helix angle theta 2 between the first screw threads, wherein the first helix angle theta 1 is not equal to the second helix angle theta 2. The mould for forming the screw mainly has the structure that a plurality of first inclined grooves and a plurality of continuous second inclined grooves are arranged on the mould, wherein the first inclined grooves can form the screw threads of the first helical angle theta 1 of the screw, the second inclined grooves in parallel are arranged at the same axial position of the first inclined grooves to form the screw threads of the second helix angle theta 2 of the screw, and the first inclined grooves and the second inclined grooves have unequal axial direction angles. Under the condition without influencing the binding force of the screw threads, the friction between screws and work pieces is reduced, and screws, particularly long screws can be easily screwed and locked in the work pieces.
Description
Technical field
The present invention relates to screw and makes the mould of this kind screw, refers to a kind of mould that has the screw of plural helix angle screw thread and make this kind screw especially.
Background technique
Traditional screw, its screw thread are the design of single helix angle all, and the topmost function of screw thread is to be cut workpiece, and utilize in the middle of the structural workpiece that is easy to revolve after lock enters cutting of its shape.
Please join shown in Figure 12, the screw of aforementioned conventional is being locked in the middle of the process of workpiece, owing to be to utilize the screw thread of single kind of helix angle to come cut workpiece, and the screw thread that utilizes same single kind of helix angle screws in the middle of the workpiece, cause the screw thread of aforementioned screw to be close to be cut workpiece and go, and the workpiece double team that was cut, so its frictional force that screws in workpiece is very big, especially more its stroke of long screw is long more, then is difficult to more lock in the middle of the workpiece.
Via above-mentioned explanation as can be known, no matter conventional screw is to constitute or using effect, because that design is not attained is perfect, and the disappearance and inconvenience that exist multinomial behaviour to denounce have necessity of improving its disappearance as quickly as possible in fact.
Summary of the invention
Main purpose of the present invention provides a kind of mould that has the screw of plural helix angle screw thread and make this kind screw, under the prerequisite of the combination force that does not influence its screw thread, reduce the frictional force between screw and workpiece, make screw, particularly long screw revolves easily and locks in the workpiece.
For achieving the above object, a kind of screw provided by the invention with plural helix angle screw thread, it consists predominantly of first screw thread that is formed with continuity first helixangle 1 at the outer surface of screw, and second screw thread that between this first screw thread, is formed with at least one second helixangle 2, wherein first helixangle 1 is not equal to second helixangle 2, the 3rd screw thread that wherein between first screw thread and the second screw thread inlet end, has at least one triple helical angle θ 3, and go out the 4th screw thread that has at least one the 4th helixangle 4 between end at first screw thread and second screw thread.
Described screw with plural helix angle screw thread, wherein this second helixangle 2 is greater than first helixangle 1.
Described screw with plural helix angle screw thread, wherein this second helixangle 2 is less than first helixangle 1.
Described screw with plural helix angle screw thread, wherein the helixangle 4 of the helixangle 3 of the 3rd screw thread or the 4th screw thread is less than first helixangle 1.
Described screw with plural helix angle screw thread, wherein the pitch of this second screw thread is the 150-170 percentage of first thread pitch, and the pitch of the 3rd screw thread and/or the 4th screw thread is the 65-75 percentage of first thread pitch.
Described screw with plural helix angle screw thread, wherein the pitch of this second screw thread is the 30-50 percentage of first thread pitch, and the pitch of the 3rd screw thread or the 4th screw thread is the 125-135 percentage of first thread pitch.
Described screw with plural helix angle screw thread, wherein the helixangle 3 of the 3rd screw thread equates or is not equal to the helixangle 4 of the 4th screw thread.
For achieving the above object, a kind of formation provided by the invention has the mould of plural helix angle threaded screw, it mainly is to be provided with plural number first valley gutter that forms screw first helixangle 1 screw thread on mould, and have at the same approximately axial position of aforementioned plural first valley gutter and to be continuous a plurality of second valley gutters that are provided with abreast, to form the screw thread of screw second helixangle 2, wherein first valley gutter and second valley gutter have unequal axial angle, wherein more including at least one the 3rd valley gutter is arranged between first valley gutter and the second valley gutter inlet end, and at least one the 4th valley gutter is arranged on first valley gutter and second valley gutter goes out between end, with first valley gutter and second valley gutter of linking up.
Described formation has the mould of plural helix angle threaded screw, wherein this mould comprise at least one first mould and with at least one second mould of the first mould symmetry.
Described formation has the mould of plural helix angle threaded screw, and wherein the 3rd valley gutter has axial angle identical or inequality with the 4th valley gutter.
Described formation has the mould of plural helix angle threaded screw, and wherein the axial angle of this second valley gutter is greater than the axial angle of first valley gutter.
Described formation has the mould of plural helix angle threaded screw, and wherein the axial angle of this second valley gutter is less than the axial angle of first valley gutter.
The invention has the advantages that, under the prerequisite of the combination force that does not influence its screw thread, reduce the frictional force between screw and workpiece, make screw, particularly long screw revolves easily and locks in the workpiece, thereby reduces working strength.
Description of drawings
In order to allow your juror can further understand formation of the present invention, special efficacy and other purposes, below be to lift a preferred embodiment, and conjunction with figs. describes in detail as the back:
Fig. 1 is a screw floor map of the present invention;
Fig. 2 is the schematic representation of first helixangle 1 of screw of the present invention greater than second helixangle 2;
Fig. 3 is the schematic representation of first helixangle 1 of screw of the present invention less than second helixangle 2;
Fig. 4 is the part sectional detail drawing after screw of the present invention screws in workpiece;
Fig. 5 is that screw of the present invention screws in torsional test curve diagrammatic sketch;
Fig. 6 is a mould schematic perspective view of the present invention;
Fig. 7 is a mould floor map of the present invention;
Fig. 8 is first, second mould schematic perspective view of the present invention;
Fig. 9 is the schematic representation of first valley gutter of mould of the present invention greater than the second valley gutter axial angle;
Figure 10 is the schematic representation of first valley gutter of mould of the present invention less than the second valley gutter axial angle;
Figure 11 is that known screw screws in torsional test curve diagrammatic sketch;
Figure 12 is that known screw is locked the generalized section in eight workpiece.
Embodiment
Below be the screw with plural helix angle screw thread of the present invention:
Please join Fig. 1～shown in Figure 3, screw 1 of the present invention consists predominantly of first screw thread 11 that is formed with continuity first helixangle 1 at outer surface, and be formed with second screw thread 12 of at least one second helixangle 2 on 11 on this first screw thread, wherein first helixangle 1 is not equal to second helixangle 2.
Brought forward is stated, and second helixangle 2 of the present invention is greater than first helixangle 1, as shown in Figure 2.Or second helixangle 2 less than first helixangle 1, join shown in Figure 3.
Ginseng Fig. 1, shown in Figure 2, moreover, the present invention is at first screw thread 11 and 111 the 3rd screw threads 13 with a triple helical angle θ 3 of second screw thread, 12 inlet ends, and goes out 112 the 4th screw threads 14 with one the 4th helixangle 4 of end at first screw thread 11 and second screw thread 12.
Ginseng Fig. 2, shown in Figure 3, brought forward is stated, and the helixangle 3 of the present invention's the 3rd screw thread 13 or the helixangle 4 of the 4th screw thread 14 are less than first screw thread, 11 first helixangles 1.
In addition, in the embodiment of Fig. 2, the pitch of the present invention's second screw thread 12 is the 150-170 percentage of first screw thread, 11 pitch, and the pitch of the 3rd screw thread 13 and/or the 4th screw thread 14 is the 65-75 percentage of first screw thread, 11 pitch.
Again, in the embodiments of figure 3, the pitch of the present invention's second screw thread 12 is the 30-50 percentage of first screw thread, 11 pitch, and the pitch of the 3rd screw thread 13 or the 4th screw thread 14 is the 125-135 percentage of first screw thread, 11 pitch.
Ginseng Fig. 1～shown in Figure 3, in addition, the triple helical angle θ 3 of the present invention's the 3rd screw thread 13 equates or is not equal to the 4th helixangle 4 of the 4th screw thread 14.
By by above-mentioned, screw 1 of the present invention is when implementing to revolve the lock workpiece, join shown in Figure 4, mainly be to utilize first screw thread 11 to carry out leading portion to revolve the lock cut workpiece, wherein A is the expression of its incision back Luo Dao, when the 3rd screw thread 13 cuttings of screw 1 enter workpiece, workpiece makes spiral shell road A cut and strut suitable width A1 because of helixangle 3 changes toward a side through the cutting of the 3rd screw thread 13, shown in Fig. 4 fine dotted line, if screw 1 continues to screw in workpiece, then second screw thread 12 enters, second screw thread 12 makes Luo Dao strut proper width A2 toward the opposite side cutting because of the change of helixangle 2, shown in Fig. 4 thick dashed line: after then the 4th screw thread 14 screws in workpiece thereupon, promptly make spiral shell road A be arrived a suitable width by expanded support, the spiral shell road A3 state shown in Fig. 4 top is under the situation that does not influence its combination force, this case can reduce the frictional force between screw 1 back segment, first screw thread 11 and workpiece, screw 1 (particularly long screw) is easily revolved lock in the workpiece.
The screw-in torsional test result of screw below more of the present invention and known screw:
Test approaches: CHIB WOOD SCREWS test specification:
Outer electrical path length pitch
Major?diameter Depth?of?thread Pitch?4.0/50/1.8
Test quantity: 10, and obtain rough mean value.
Result after tested, ginseng Fig. 5 curve discloses, the acrotorque of screw of the present invention appears at about 2.0-2.5cm, acrotorque mean value is 34.2kg/cm, be horizontal approximately afterwards, then no longer increase torsion backward, this means the use of long screw, to be very laborsaving, and can not increase and lock required torsion because of the increase of length.
Shown in the curve of Figure 11, the acrotorque mean value of aforementioned known screw is 46.1kg/cm, and the long more torsion of its length is big more, difficult more locking.Learn by preceding taking off test result, relatively go up that the more known screw of screw of the present invention is laborsaving about more than 25%, and be laborsaving more relatively going up length long more at the screw of 5cm.
Below form aforementioned mould with plural helix angle threaded screw for the present invention:
Please join Fig. 6～shown in Figure 10, mould 2 of the present invention mainly is to be provided with plural number first valley gutter 21 that forms aforementioned screw 1 first helixangle 1 screw thread 11 thereon, and have at the same axial position of aforementioned plural first valley gutter 21 and to be continuous a plurality of second valley gutters 22 that are provided with abreast, to form the screw thread 12 of screw 1 second helixangle 2, wherein first valley gutter 21 and second valley gutter 22 have unequal axial angle.
Please join shown in Figure 8, moreover, mould 2 of the present invention comprise at least one first mould 20 and with at least one second mould 201 of first mould, 20 symmetries.
Please join Fig. 7, Fig. 9, shown in Figure 10, mould 2 of the present invention again more includes at least one the 3rd valley gutter 23 and is arranged on 211 of first valley gutter 21 and second valley gutter, 22 inlet ends, and at least one the 4th valley gutter 24 is arranged on first valley gutter 21 and second valley gutter 22 goes out 212 at end, with first valley gutter 21 and second valley gutter 22 of linking up.
Brought forward is stated, and the 3rd valley gutter 23 wherein of the present invention has axial angle identical or inequality with the 4th valley gutter 24.
In addition, the axial angle of second valley gutter 22 of mould 2 of the present invention is greater than the axial angle of first valley gutter 21, joins shown in Figure 9ly, and its screw of making as shown in Figure 2.Or the axial angle of this second valley gutter 22 is less than the axial angle of first valley gutter 21, joins shown in Figure 10ly, and its screw of making as shown in Figure 3.
Claims (12)
1, a kind of screw with plural helix angle screw thread, it consists predominantly of first screw thread that is formed with continuity first helix angle (θ 1) at the outer surface of screw, and second screw thread that between this first screw thread, is formed with at least one second helix angle (θ 2), wherein first helix angle (θ 1) is not equal to second helix angle (θ 2), it is characterized in that, the 3rd screw thread that wherein between first screw thread and the second screw thread inlet end, has at least one triple helical angle (θ 3), and go out the 4th screw thread that has at least one the 4th helix angle (θ 4) between end at first screw thread and second screw thread.
2, the screw with plural helix angle screw thread according to claim 1 is characterized in that, wherein this second helix angle (θ 2) is greater than first helix angle (θ 1).
3, the screw with plural helix angle screw thread according to claim 1 is characterized in that, wherein this second helix angle (θ 2) is less than first helix angle (θ 1).
4, the screw with plural helix angle screw thread according to claim 1 is characterized in that, wherein the helix angle (θ 4) of helix angle of the 3rd screw thread (θ 3) or the 4th screw thread is less than first helix angle (θ 1).
5, the screw with plural helix angle screw thread according to claim 1, it is characterized in that, wherein the pitch of this second screw thread is the 150-170 percentage of first thread pitch, and the pitch of the 3rd screw thread and/or the 4th screw thread is the 65-75 percentage of first thread pitch.
6, the screw with plural helix angle screw thread according to claim 1, it is characterized in that, wherein the pitch of this second screw thread is the 30-50 percentage of first thread pitch, and the pitch of the 3rd screw thread or the 4th screw thread is the 125-135 percentage of first thread pitch.
7, the screw with plural helix angle screw thread according to claim 1 is characterized in that, wherein the helix angle of the 3rd screw thread (θ 3) equates or be not equal to the helix angle (θ 4) of the 4th screw thread.
8, a kind of formation has the mould of plural helix angle threaded screw, it mainly is to be provided with plural number first valley gutter that forms screw first helix angle (θ 1) screw thread on mould, and have at the same approximately axial position of aforementioned plural first valley gutter and to be continuous a plurality of second valley gutters that are provided with abreast, to form the screw thread of screw second helix angle (θ 2), wherein first valley gutter and second valley gutter have unequal axial angle, it is characterized in that, wherein more including at least one the 3rd valley gutter is arranged between first valley gutter and the second valley gutter inlet end, and at least one the 4th valley gutter is arranged on first valley gutter and second valley gutter goes out between end, with first valley gutter and second valley gutter of linking up.
9, formation according to claim 8 has the mould of plural helix angle threaded screw, it is characterized in that, wherein this mould comprise at least one first mould and with at least one second mould of the first mould symmetry.
10, formation according to claim 8 has the mould of plural helix angle threaded screw, it is characterized in that, wherein the 3rd valley gutter has axial angle identical or inequality with the 4th valley gutter.
11, formation according to claim 8 has the mould of plural helix angle threaded screw, it is characterized in that, wherein the axial angle of this second valley gutter is greater than the axial angle of first valley gutter.
12, formation according to claim 8 has the mould of plural helix angle threaded screw, it is characterized in that, wherein the axial angle of this second valley gutter is less than the axial angle of first valley gutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100022929A CN1295444C (en) | 2004-01-16 | 2004-01-16 | Screw with plural helical angle thread and mould for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100022929A CN1295444C (en) | 2004-01-16 | 2004-01-16 | Screw with plural helical angle thread and mould for making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1641232A CN1641232A (en) | 2005-07-20 |
| CN1295444C true CN1295444C (en) | 2007-01-17 |
Family
ID=34867327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100022929A Expired - Fee Related CN1295444C (en) | 2004-01-16 | 2004-01-16 | Screw with plural helical angle thread and mould for making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1295444C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108349030A (en) * | 2015-11-05 | 2018-07-31 | 株式会社ＮｅｊｉＬａｗ | Double screw manufacturing methods and double screw fabrication schedules |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834602A (en) * | 1987-06-19 | 1989-05-30 | Yao Seibyo Co., Ltd. | Tapping screw |
| US4874278A (en) * | 1987-02-16 | 1989-10-17 | Kabushiki Kaisha Yamahiro | Wood screw with chip removing portion |
| JPH07151123A (en) * | 1993-11-29 | 1995-06-13 | Kamenosuke Fukui | Wood screw |
| CN2303970Y (en) * | 1997-05-23 | 1999-01-13 | 赵允修 | Spiral special-shaped nail |
| JP2000002218A (en) * | 1998-06-15 | 2000-01-07 | Shinjo Seisakusho:Kk | Wood screw |
| JP2000283131A (en) * | 1999-03-30 | 2000-10-13 | Murata Mach Ltd | Nail |
-
2004
- 2004-01-16 CN CNB2004100022929A patent/CN1295444C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4874278A (en) * | 1987-02-16 | 1989-10-17 | Kabushiki Kaisha Yamahiro | Wood screw with chip removing portion |
| US4834602A (en) * | 1987-06-19 | 1989-05-30 | Yao Seibyo Co., Ltd. | Tapping screw |
| JPH07151123A (en) * | 1993-11-29 | 1995-06-13 | Kamenosuke Fukui | Wood screw |
| CN2303970Y (en) * | 1997-05-23 | 1999-01-13 | 赵允修 | Spiral special-shaped nail |
| JP2000002218A (en) * | 1998-06-15 | 2000-01-07 | Shinjo Seisakusho:Kk | Wood screw |
| JP2000283131A (en) * | 1999-03-30 | 2000-10-13 | Murata Mach Ltd | Nail |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1641232A (en) | 2005-07-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070117 Termination date: 20110116 |