CN2438571Y - Plastic self-locking screw thread fastening - Google Patents
Plastic self-locking screw thread fastening Download PDFInfo
- Publication number
- CN2438571Y CN2438571Y CN 00232911 CN00232911U CN2438571Y CN 2438571 Y CN2438571 Y CN 2438571Y CN 00232911 CN00232911 CN 00232911 CN 00232911 U CN00232911 U CN 00232911U CN 2438571 Y CN2438571 Y CN 2438571Y
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- China
- Prior art keywords
- self
- locking
- fastening piece
- thread fastening
- locking thread
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Abstract
The utility model provides a self-locking fastener as a whole part of a single member, and the utility model is made of deformable plastic. The self-locking screw thread fastener comprises a head part and a threaded rod part which longitudinally extends from the head part to a free end, wherein locking materials are integrally formed in screw threads on the threaded rod part and the locking materials are deformed when the threaded rod part is screwed in screw holes. The deformation of the locking materials generates tight fit between the self-locking screw thread fastener and parts with the screw holes, and in a preferable embodiment, a plurality of locking materials are formed along the longitudinal length of the threaded rod part; the locking material wires are preferably and mutually partitioned. The head part is provided with a groove which extends through a midpoint, or the head part or the threaded rod part is provided with a hexagonal hole for containing screwing tools.
Description
The present invention relates generally to a kind of self-locking thread fastening piece.More specifically say, the present invention relates to the self-locking thread fastening piece of making by available plastics.
Now, on market, can obtain the self-locking fastener of many types.These self-locking fasteners are used on the device that bears vibrations etc. usually.In the past, the bar portion of self-locking fastener is provided with a spring, with at the screw thread of fastening piece with admit between the screw of fastening piece and apply an axially extended power.The also known working of plastics that utilizes, the latter is connected on the part of band screw in not rotatable mode, makes bolt or threaded fastener be screwed in the hole of the working of plastics littler than major diameter of thread.Like this, threaded fastener cuts out screw thread on working of plastics, makes threaded fastener can not break away from the part of being with screw.Adopting a routine device of this working of plastics is the front chain mover of bicycle, and it has the adjusting screw of a screw-in vinyl cover, the motion of dialling the chain device with control.
Also be known in additional locking material on the metal fastenings in the prior art.The example of this fastening piece is disclosed in the U.S. Patent No. 2,633,344 of authorizing Burdick; Authorize 3,093,177 of Villo; Authorize 3,474,845 of Podell; With authorize Faroni 3,568,746 in.
Although various prior aries may be effectively, they have different defectives.It is generally more expensive when for example, they are made and/or assemble.And some this class fastening piece is difficult for making.In addition, some prior art fastening piece repeatedly tighten and unscrew fastening piece after can not normally work.
In view of this, need a kind of self-locking thread fastening piece that can overcome the problems referred to above in the prior art at present.The present invention has satisfied these needs of the prior art and other needs, and the Professional visitors can obviously find out this point from this specification.
The purpose of this invention is to provide a kind of self-locking thread fastening piece that constitutes by plastics.
Another object of the present invention provides a kind of self-locking thread fastening piece of low cost of manufacture.
By providing a kind of self-locking thread fastening piece to achieve the above object basically, comprise a head; With one extend to a free-ended plastic bar portion from the head, be shaped on screw thread in the plastic bar portion, screw thread has the crest of band external diameter and the root of band internal diameter, and locking material and plastic bar portion integrally form a single and unitary part, and locking material stretches out from least one described root wherein.
The Professional visitors can obviously find out these and other purposes of the present invention from following detailed, aspect and advantage, and following description discloses the preferred embodiments of the present invention in conjunction with the accompanying drawings.
Accompanying drawing referring now to the original disclosed part of formation specification:
Fig. 1 is a side view, shows the self-locking thread fastening piece according to first embodiment of the invention;
Fig. 2 is a left end view, shows the self-locking thread fastening piece shown in Figure 1 according to first embodiment of the invention;
Fig. 3 is a side view, show according to the self-locking thread fastening piece shown in Fig. 1 and 2 of first embodiment of the invention, but from the rotated position of Fig. 1 90 degree;
Fig. 4 is a right end view, shows the self-locking thread fastening piece shown in the Fig. 1-3 according to first embodiment of the invention;
Fig. 5 is a side view, shows the self-locking thread fastening piece according to second embodiment of the invention;
Fig. 6 is a left end view, shows the self-locking thread fastening piece shown in Figure 5 according to second embodiment of the invention;
Fig. 7 is a side view, show according to the self-locking thread fastening piece shown in Fig. 5 and 6 of second embodiment of the invention, but from the rotated position of Fig. 5 90 degree;
Fig. 8 is a right end view, shows the self-locking thread fastening piece shown in the Fig. 5-7 according to second embodiment of the invention;
Fig. 9 is a side view, shows the self-locking thread fastening piece according to third embodiment of the invention;
Figure 10 is a left end view, shows the self-locking thread fastening piece shown in Figure 9 according to third embodiment of the invention;
Figure 11 is a side view, show according to the self-locking thread fastening piece shown in Fig. 9 and 10 of third embodiment of the invention, but from the rotated position of Fig. 9 90 degree;
Figure 12 is a right end view, shows the self-locking thread fastening piece shown in the Fig. 9-11 according to third embodiment of the invention;
Figure 13 is an end elevation, shows the head according to the self-locking thread fastening piece of fourth embodiment of the invention;
Figure 14 is an end elevation, shows the thread rod part according to the self-locking thread fastening piece of fifth embodiment of the invention;
Figure 15 is an end elevation, shows the thread rod part according to the self-locking thread fastening piece of sixth embodiment of the invention;
Figure 16 is an end elevation, shows the thread rod part according to the self-locking thread fastening piece of seventh embodiment of the invention;
At first, show self-locking thread fastening piece 10 according to first embodiment of the invention with reference to Fig. 1-4.Self-locking thread fastening piece 10 is used in particular in the bicycle assembly parts.For example, this self-locking thread fastening piece can be used for U.S. Patent No. 4,425, in 819 in the disclosed braking device.Specifically, self-locking thread fastening piece 10 can be used to replace U.S. Patent No. 4,425, the adjusting screw (7) of the braking device in 819.Certainly, the Professional visitors can find out obviously that self-locking thread fastening piece 10 can be used as the adjusting screw in other bicycle assembly parts.For example, in the novel brake rod that has whole speed change gear of Shimano company, self-locking thread fastening piece 10 can be used as adjusting screw, and as the adjusting screw of dialling the chain device.
Self-locking thread fastening piece 10 comprises that mainly a head 12 and one 12 extends axially free-ended thread rod part 14 from the head.Thread rod part 14 comprises integrally formed with it locking material 16.This locking material 16 will be out of shape when being designed in the screw on screwing in a counterpart (not shown).This distortion of locking material 16 produces a drive fit between the counterpart of self-locking thread fastening piece and band screw.As below discussing, in the preferred embodiment, be formed with many locking materials 16 along the longitudinal length of the thread rod part 14 of threaded fastener 10.
Self-locking thread fastening piece 10 forms a single and unitary part by a suitable plastic materials, realizes auto-lock function of the present invention.The plastic materials of self-locking thread fastening piece 10 should allow self-locking thread fastening piece 10 to be repeatedly used.It is its nylon material that is embedded with glass fibre that the plastic materials of self-locking thread fastening piece 10 allows.Nylon material preferably has the glass fibre of material total volume about 55%.An a kind of example of suitable material is the nylon/fiberglass products (production number MC112LG55C10) by the Kanebo sale of Japan.
As mentioned above, when self-locking fastener 10 was used on the speed change gear, head 12 is a comparatively smooth dish preferably.Specifically, head 12 preferably has an axial height and an Extreme breadth or diameter, the latter be about its axial height less than 3 times.And head 12 preferably has an Extreme breadth, and this Extreme breadth is not more than about 1.5mm of thread rod part 14 external diameters.In the preferred embodiment, the maximum diameter or the width of head 12 are about 5.0mm ± 0.1mm.Axial height is about 1.6mm ± 0.1mm.These sizes based on prerequisite be the worm structure that thread rod part 14 has M4X.07.Certainly, these sizes of head 12 can change according to the configuration of thread rod part 14.
Be formed with one group of screw thread on the thread rod part 14, tip of thread has outer diameter D
1, thread root has inside diameter D
2Be formed with a guiding element 20 on the free end of thread rod part 14.In this first embodiment, guiding element 20 is one to be the taper part of truncated cone shape.Certainly, guiding element 20 can adopt many different shapes.
In this preferred embodiment, thread rod part 14 has the worm structure of a M4X0.7-6g type.In other words, the outer diameter D of the crest of thread rod part 14
1Be about 3.8mm, and the inside diameter D of the root of thread rod part 14
2Be about 3.2mm.Certainly, the Professional visitors can obviously find out the worm structure that can adopt other types from specification.In the preferred embodiment, thread rod part is about 9.6mm ± 0.1mm.
One group of position of thread root at thread rod part 14 forms locking material 16.Specifically, as shown in Figure 3, locking material 16 forms the longitudinally extending line of pair of locking material 16.When thread rod part 14 had two locking materials, the line of locking material 16 preferably was configured as and separates 180 °.Certainly, the Professional visitors can obviously find out from this specification can adopt an only independent locking material 18, perhaps can adopt the locking material 16 more than two.The line of locking material 16 is preferably around the peripheral spaced at equal intervals of thread rod part 14.The outer diameter D that has a 3.8mm at thread rod part 14
1Inside diameter D with a 3.2mm
2Situation under, locking material 16 radially extends about 0.75mm from the root of screw thread.In other words, in the embodiment shown, thread rod part 14 is about 3.5mm at this diameter to the line place of locking material 16.The line of locking material 16 preferably has the width of about 3.5mm in a circumferential direction.
When self-locking thread fastening piece 10 was used as an adjusting screw in a variable-speed unit, locking material should produce about 0.6Nm or littler initial spiral moment of torsion as mentioned above.After self-locking fastener was screwed and unscrew 5 times, spiral thereafter or rotatory force should be about 0.05Nm.In a preferred embodiment, the line of locking material 16 roughly extends along the entire longitudinal length of thread rod part 14.Certainly, the Professional visitors can find out obviously that from this specification the line of many locking materials 16 need not extend the whole length of thread rod part 14.At least 50% of the longitudinal length of thread rod part 14 preferably has at least one locking material line 16.The concrete application of self-locking thread fastening piece 10 will be depended in the position of locking material 16.
Second embodiment
Referring now to Fig. 5-8, wherein show a self-locking thread fastening piece 110 according to second embodiment of the invention.Be similar to first embodiment, self-locking thread fastening piece 110 comprises that mainly a head 112 and has the thread rod part 114 of the line of pair of locking material 116.This embodiment is similar to last embodiment discussed above, has just changed the free end of thread rod part 114.Specifically, the free end of thread rod part 114 is provided with a guiding element 120, has a taper or frustoconical part 121 and a circular cylinder shaped portion 122.
Given this similarity between embodiment and the last embodiment, the self-locking thread fastening piece 110 of present embodiment will not go through at this.On the contrary, the Professional visitors's various parts that from this specification, will obviously find out last embodiment with the similar or identical part that is applicable to present embodiment is described.
The 3rd embodiment
Referring now to Fig. 9-12, wherein show a self-locking thread fastening piece 210 according to third embodiment of the invention.Be similar to first embodiment, self-locking thread fastening piece 210 comprises that mainly a head 212 and has the thread rod part 214 of the line of pair of locking material 216.This embodiment is similar to last embodiment discussed above, has just changed the free end of thread rod part 214.Specifically, the free end of thread rod part 214 is provided with a guiding element 220, has a threadless cylindric configuration.The diameter of this guiding element 220 is not more than the root diameter (RD) of thread rod part 214.
Given this similarity between embodiment and the preceding embodiment, the self-locking thread fastening piece 210 of present embodiment will not go through at this.On the contrary, embodiment's various parts and description were applicable to the similar or identical part of present embodiment before the Professional visitors will obviously find out from this specification.
The 4th embodiment
Referring now to Figure 13, wherein show a self-locking thread fastening piece 310 according to fourth embodiment of the invention.Self-locking thread fastening piece 310 mainly comprises a head 312 and a thread rod part (not shown).The thread rod part of self-locking thread fastening piece 310 can have the configuration of the thread rod part of arbitrary previous embodiment.This embodiment is similar to preceding embodiment discussed above, has just changed head 312 to have a hexagonal hole 318.
Given this similarity between embodiment and the preceding embodiment, the self-locking thread fastening piece 310 of present embodiment will not go through and illustrate at this.On the contrary, embodiment's various parts and description were applicable to the similar or identical part of present embodiment before the Professional visitors will obviously find out from this specification.
The 5th embodiment
Referring now to Figure 14, wherein show a self-locking thread fastening piece 410 according to fifth embodiment of the invention.Self-locking thread fastening piece 410 comprises that mainly a head 412 and has the thread rod part 414 of the line of locking material 416.The head 412 of self-locking thread fastening piece 410 does not have an instrument receiving channel or a hole.On the other hand, the thread rod part 414 of self-locking thread fastening piece 410 has an axially extended hex hole 418, in order to admit an instrument therein.The thread rod part 414 of self-locking thread fastening piece 410 has the same configuration of above-mentioned first embodiment's thread rod part.
Given this similarity between embodiment and the preceding embodiment, the self-locking thread fastening piece 410 of present embodiment will not go through at this.On the contrary, embodiment's various parts and description were applicable to the similar or identical part of present embodiment before the Professional visitors will obviously find out from this specification.
The 6th embodiment
Referring now to Figure 15, wherein show a self-locking thread fastening piece 510 according to sixth embodiment of the invention.Self-locking thread fastening piece 510 comprises that mainly a head 512 and has the thread rod part 514 of the line of locking material 516.The head 512 of self-locking thread fastening piece 510 does not have an instrument receiving channel or a hole.On the other hand, the thread rod part 514 of self-locking thread fastening piece 510 has an axially extended hex hole 516, in order to admit an instrument therein.The thread rod part 514 of self-locking thread fastening piece 510 has the same configuration of above-mentioned second embodiment's thread rod part.
Given this similarity between embodiment and the preceding embodiment, the self-locking thread fastening piece 510 of present embodiment will not go through at this.On the contrary, embodiment's various parts and description were applicable to the similar or identical part of present embodiment before the Professional visitors will obviously find out from this specification.
The 7th embodiment
Referring now to Figure 16, wherein show a self-locking thread fastening piece 610 according to seventh embodiment of the invention.Self-locking thread fastening piece 610 comprises that mainly a head 612 and has the thread rod part 614 of the line of locking material 616.The head 612 of self-locking thread fastening piece 610 does not have an instrument receiving channel or a hole.On the other hand, the thread rod part 614 of self-locking thread fastening piece 610 has an axially extended hex hole 616, in order to admit an instrument therein.The thread rod part 614 of self-locking thread fastening piece 610 has the same configuration of above-mentioned the 3rd embodiment's thread rod part.
Given this similarity between embodiment and the preceding embodiment, the self-locking thread fastening piece 610 of present embodiment will not go through at this.On the contrary, embodiment's various parts and description were applicable to the similar or identical part of present embodiment before the Professional visitors will obviously find out from this specification.
Although selected several embodiments that the present invention is described, the Professional visitors can obviously find out from specification and can make multiple change and change and do not exceed the invention scope that is limited by the appended claim book.And, to the foregoing description of the embodiment of the invention just for purpose of explanation, be not to be the present invention who is limited by appended claim book and equivalent thereof in order to limit.
Claims (27)
1. plastics self-locking thread fastening piece comprises:
One head and
One extends to a free-ended plastic bar portion from described head, be shaped on screw thread in the described plastic bar portion, described screw thread has the crest of band external diameter and the root of band internal diameter, and locking material and described plastic bar portion integrally form a single and unitary part, and described locking material stretches out from least one described root wherein.
2. self-locking thread fastening piece as claimed in claim 1, wherein said head and described plastic bar portion integrally form a single and unitary part.
3. self-locking thread fastening piece as claimed in claim 1 comprises that also one is formed on the attachment portion in one of described head and bar portion, so that rotated by an instrument.
4. self-locking thread fastening piece as claimed in claim 3, wherein said attachment portion is arranged on the described head.
5. self-locking thread fastening piece as claimed in claim 3, wherein said attachment portion are arranged on the free end of described bar portion.
6. self-locking thread fastening piece as claimed in claim 3, wherein said attachment portion have the groove of the mid point horizontal expansion of passing described attachment portion.
7. self-locking thread fastening piece as claimed in claim 3, there is a hex-shaped recess wherein said attachment portion, to admit a hexagon part of instrument.
8. self-locking thread fastening piece as claimed in claim 1, wherein said locking material are formed on a plurality of positions of the described root of described screw thread.
9. self-locking thread fastening piece as claimed in claim 1, wherein said locking material vertically is provided with along described bar portion at the described root of described screw thread.
10. self-locking thread fastening piece as claimed in claim 9, the described line of wherein said locking material extends along 55% of the longitudinal length of described bar portion at least.
11. self-locking thread fastening piece as claimed in claim 9, the described line of wherein said locking material extends generally along the entire longitudinal length of described bar portion.
12. self-locking thread fastening piece as claimed in claim 1, described locking material vertically is provided with along described bar portion at the described root of described screw thread, to form many described locking materials.
13. self-locking thread fastening piece as claimed in claim 1, the described free end of wherein said bar portion have a guiding element that forms thereon.
14. self-locking thread fastening piece as claimed in claim 13, wherein said guiding element comprise a taper part.
15. self-locking thread fastening piece as claimed in claim 13, wherein said guiding element comprise a threadless circular cylinder shaped portion, its diameter is not more than the described internal diameter of the described root of described screw thread.
16. self-locking thread fastening piece as claimed in claim 1, wherein said head have an axial height and an Extreme breadth, this width is about described axial height less than 3 times.
17. self-locking thread fastening piece as claimed in claim 1, wherein said head has an Extreme breadth, and this width is not more than about 1.5mm of described external diameter of the described crest of described screw thread.
18. self-locking thread fastening piece as claimed in claim 17, wherein said head have an axial height and an Extreme breadth, this width is about described axial height less than 3 times.
19. self-locking thread fastening piece as claimed in claim 12, there is a circumference in wherein said bar portion, the described circumference spaced at equal intervals of the described bar of the described wire-wound portion of described locking material.
20. self-locking thread fastening piece as claimed in claim 19, the described free end of wherein said bar portion have a guiding element that forms thereon.
21. self-locking thread fastening piece as claimed in claim 20, wherein said guiding element comprise a taper part.
22. self-locking thread fastening piece as claimed in claim 20, wherein said guiding element comprise a threadless circular cylinder shaped portion, its diameter is not more than the described internal diameter of the described root of described screw thread.
23. self-locking thread fastening piece as claimed in claim 19, wherein said head have an axial height and an Extreme breadth, this width is about described axial height less than 3 times.
24. self-locking thread fastening piece as claimed in claim 19, wherein said head has an Extreme breadth, and this width is not more than about 1.5mm of described external diameter of the described crest of described screw thread.
25. self-locking thread fastening piece as claimed in claim 24, wherein said head have an axial height and an Extreme breadth, this width is about described axial height less than 3 times.
26。Self-locking thread fastening piece as claimed in claim 1, wherein said head and bar portion are made of the nylon material of band glass fibre.
27. self-locking thread fastening piece as claimed in claim 26, wherein said glass fibre by volume is about 55% of described nylon material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31415099 | 1999-05-19 | ||
| JP09/314150 | 1999-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2438571Y true CN2438571Y (en) | 2001-07-11 |
Family
ID=34044654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00232911 Expired - Fee Related CN2438571Y (en) | 1999-05-19 | 2000-05-18 | Plastic self-locking screw thread fastening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2438571Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555245A (en) * | 2012-02-13 | 2012-07-11 | 浙江鼎耐塑胶管阀有限公司 | Method for manufacturing hexagonal all-plastic corrosion-resistant bolt |
-
2000
- 2000-05-18 CN CN 00232911 patent/CN2438571Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555245A (en) * | 2012-02-13 | 2012-07-11 | 浙江鼎耐塑胶管阀有限公司 | Method for manufacturing hexagonal all-plastic corrosion-resistant bolt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |