CN204041680U - Screw - Google Patents
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- Publication number
- CN204041680U CN204041680U CN201420464326.5U CN201420464326U CN204041680U CN 204041680 U CN204041680 U CN 204041680U CN 201420464326 U CN201420464326 U CN 201420464326U CN 204041680 U CN204041680 U CN 204041680U
- Authority
- CN
- China
- Prior art keywords
- screw
- smooth section
- section
- bullet pad
- bulge loop
- 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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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model discloses a kind of screw, comprise screw body and bullet pad, screw body comprises head and screw rod, screw rod comprises thread section and smooth section, smooth section is near head, play cushion cover and be located at smooth section setting, bullet pad is connected with smooth section slippage, the corresponding smooth section of screw rod and thread section joint are fixedly installed bulge loop, the internal diameter of bullet pad is greater than the external diameter of smooth section, the internal diameter of bullet pad is less than the external diameter of bulge loop, the external diameter of bulge loop is less than the large footpath of screw thread, the length of smooth section is not less than the length of thread section, this screw can prevent in transport, surface treatment process be hit by a bullet pad with screw thread stuck, be very easy to the use of user, applied widely.
Description
Technical field
The utility model relates to a kind of fastening piece, in particular, relates to a kind of screw.
Background technique
Screw, also screw is, comprise head and screw rod, screw rod is provided with screw thread, screw utilizes the inclined-plane circular rotating of object and the physics of frictional force and mathematical principle, the instrument of fastening implements parts by easy stages, screw is industrial necessity indispensable in daily life: the minimum screw used as photographic camera, glasses, clock and watch, electronics etc.; The general screw of TV, electric product, musical instrument, household etc.; Be placed in engineering, building, bridge and then use large-scale screw, nut, traffic tool, aircraft, electric car, automobile light then sized by screw using.Important task industrially born by screw, as long as the earth also exists industry, then the function of screw is forever important.Screw is the joint invention in people's life over the past thousands of years, and according to application, it is the first invention of the mankind.
Screw in actual use, mostly uses screw and the combination of bullet pad, can prevent loosening of screw, be widely used especially on vibrations object.Thus screw all manufactures when manufacturing screw and combines by producer together with bullet pad, the corresponding large bullet pad of ting model and the trouble of screw recombinant is found when using to reduce, but the screw dispatched from the factory at present and play pad assembly and be directly enclosed within screw due to bullet pad, bullet pad is near head, between bullet pad and screw thread without hindrance, be hit by a bullet to pad in processes such as transport, surface treatments and very easily slide into screw rod position, bullet pad is made to be stuck between screw flight, sometimes need to use apparatus that it just can be made to get back to be close to head position, to bring great inconvenience to user.
Model utility content
For the deficiencies in the prior art, the utility model provides a kind of preventing and is hit by a bullet pads the screw stuck with screw thread at transport, surface treatment process.
For achieving the above object, the utility model provides following technological scheme: comprise screw body and bullet pad, screw body comprises head and screw rod, screw rod comprises thread section and smooth section, and smooth section is arranged near head, plays cushion cover and is located at smooth section, bullet pad is connected with smooth section slippage, the corresponding smooth section of screw rod and thread section joint are fixedly installed bulge loop, and the internal diameter of bullet pad is greater than the external diameter of smooth section, and the internal diameter of bullet pad is less than the external diameter of bulge loop.
By adopting technique scheme, in transport or when carrying out surface treatment, bullet pad slides in smooth section, but bullet pad internal diameter is less than the external diameter of bulge loop, playing pad position is limited on the screw rod between smooth section to head, bulge loop cannot be gone beyond to thread section, the screw thread of bullet pad and thread section can be avoided stuck, this screw user-friendly.
The utility model is set to further: bulge loop and thread section joint are provided with groove, be provided with chamfering, be provided with chamfering between groove and thread section between groove and bulge loop.
By adopting technique scheme, groove and bulge loop are one-body molded, and by trench portions material to the spreading of smooth section direction to formation groove and bulge loop, without the need to welding bulge loop separately, production process is simple.
The utility model is set to further: the external diameter of bulge loop is less than the large footpath of screw thread, and the length of smooth section is not less than the length of thread section.
By adopting technique scheme, screw body uses in precession process, and the hole be threaded through then bulge loop just can easily pass through, and the length portion of smooth section is less than the length of thread section, screw body is reduced with the surface of contact of implements in precession process, reduces the frictional force of precession.
The utility model is set to further: the corresponding smooth section the other end of thread section is provided with fine stern.
By adopting technique scheme, in the position that fine stern makes screw body more easily place corresponding use or hole, facilitate staff's operation.
The utility model is set to further: screw body and bullet pad surface are all coated with the color zinc layers of trivalent chromium.
By adopting technique scheme, trivalent chromium safety and environmental protection, chromium coating has very high hardness simultaneously, the hardness of screw body can be improved, and chromium coating friction factor is little, particularly dry friction coefficient is minimum in all metals, chrome plating has good chemical stability, all do not have an effect in alkali, sulphide, nitric acid and most of organic acid, make screw service condition more extensive, the color zinc of plating trivalent chromium can make scratch site carry out passivation again, carries out self-repair damage, improves the practicability of screw body and bullet pad assembly.
Compared with prior art, the utility model screw can prevent transport, surface treatment process be hit by a bullet pad with screw thread stuck, be very easy to the use of user.
Accompanying drawing explanation
Fig. 1 is the plan view of the utility model screw;
Fig. 2 is the A portion enlarged view of Fig. 1.
Reference character: 1, head; 2, smooth section; 3, thread section; 4, fine stern; 5, bullet pad; 7, bulge loop; 8, groove; 55, screw body.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model screw embodiment is described further.
Screw, comprise screw body 55 and bullet pad 5, screw body 55 comprises head 1 and screw rod, screw rod comprises thread section 3 and smooth section 2, smooth section 2 is near head 1, bullet pad 5 is sheathed on smooth section 2 and arranges, bullet pad 5 is connected with smooth section 2 slippage, the corresponding smooth section 2 of screw rod is fixedly installed bulge loop 7 with thread section 3 joint, the internal diameter of bullet pad 5 is greater than the external diameter of smooth section 2, the internal diameter of bullet pad 5 is less than the external diameter of bulge loop 7, this assembly parts is in transport or when carrying out surface treatment, bullet pad 5 slides in smooth section 2, but the internal diameter of bullet pad 5 is less than the external diameter of bulge loop 7, bullet pad 5 position is limited on the screw rod between smooth section 2 to head 1, bulge loop 7 to thread section 3 cannot be gone beyond, bullet pad 5 can be avoided stuck with the screw thread of thread section 3, thus save to expend time in and bullet pad 5 is classified as near head 1 with apparatus, this screw user-friendly.
Further bulge loop 7 is provided with groove 8 with thread section 3 joint, chamfering is provided with between groove 8 and bulge loop 7, chamfering is provided with between groove 8 and thread section 3, in process of production, by groove 8 portion of material to smooth section 2 direction spreading to forming groove 8 and bulge loop 7, groove 8 is one-body molded with bulge loop 7, without the need to welding separately bulge loop 7, production process is simple and its material one-body molded is identical more durable, not easy-rupturing or be distorted, and chamfering more contributes to the propelling of mould in forming process.
The external diameter of further bulge loop 7 is less than the large footpath of screw thread, the length of smooth section 2 is not less than the length of thread section 3, screw body 55 uses in precession process, the hole be threaded through then bulge loop 7 just can easily pass through, preferred smooth section 2 length is identical with thread section 3 length, screw body 55 is reduced with the surface of contact of implements in precession process, reduces the frictional force of precession.
Further thread section 3 corresponding smooth section 2 the other end is provided with fine stern 4, and fine stern 4 makes screw body 55 more easily place in requisition in the position used or hole, facilitates staff's operation.
Further screw body 55 and bullet pad 5 surface are all coated with the color zinc layers of trivalent chromium, trivalent chromium safety and environmental protection, chromium coating has very high hardness simultaneously, the hardness of screw body 55 can be improved, and chromium coating friction factor is little, particularly dry friction coefficient is minimum in all metals, chrome plating has good chemical stability, at alkali, sulphide, all do not have an effect in nitric acid and most of organic acid, make screw body 55 service condition more extensive, the color zinc of plating trivalent chromium can make just to go up position and carry out passivation again, carry out self-repair damage, improve the practicability of screw body 55 and bullet pad 5 assembly parts.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a screw, comprise screw body and bullet pad, screw body comprises head and screw rod, it is characterized in that: described screw rod comprises thread section and smooth section, and smooth section is arranged near head, play cushion cover and be located at smooth section, bullet pad is connected with smooth section slippage, the corresponding smooth section of described screw rod and thread section joint are fixedly installed bulge loop, and the internal diameter of described bullet pad is greater than the external diameter of smooth section, and the internal diameter of bullet pad is less than the external diameter of bulge loop.
2. screw according to claim 1, is characterized in that: described bulge loop and thread section joint are provided with groove, be provided with chamfering, be provided with chamfering between groove and thread section between groove and bulge loop.
3. screw according to claim 2, is characterized in that: the external diameter of described bulge loop is less than the large footpath of screw thread, and the length of smooth section is not less than the length of thread section.
4. screw according to claim 3, is characterized in that: the corresponding smooth section the other end of described thread section is provided with fine stern.
5. screw according to claim 4, is characterized in that: described screw body and bullet pad surface are all coated with the color zinc layers of trivalent chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464326.5U CN204041680U (en) | 2014-08-16 | 2014-08-16 | Screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420464326.5U CN204041680U (en) | 2014-08-16 | 2014-08-16 | Screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204041680U true CN204041680U (en) | 2014-12-24 |
Family
ID=52242349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420464326.5U Expired - Fee Related CN204041680U (en) | 2014-08-16 | 2014-08-16 | Screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204041680U (en) |
-
2014
- 2014-08-16 CN CN201420464326.5U patent/CN204041680U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151023 Address after: 310018, No. 1, No. 15, No. 30, main street, Hangzhou economic and Technological Development Zone, Zhejiang, A Patentee after: Hangzhou tongna Hardware Manufacturing Co. Ltd. Address before: 310018 M14-11-2 block, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Patentee before: ESSENCE ELECTROMECHANICAL MANUFACTURING (HANGZHOU) CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160816 |