CN202756394U - Combined screw - Google Patents
Combined screw Download PDFInfo
- Publication number
- CN202756394U CN202756394U CN 201220321718 CN201220321718U CN202756394U CN 202756394 U CN202756394 U CN 202756394U CN 201220321718 CN201220321718 CN 201220321718 CN 201220321718 U CN201220321718 U CN 201220321718U CN 202756394 U CN202756394 U CN 202756394U
- Authority
- CN
- China
- Prior art keywords
- screw
- thread
- rod
- sem
- nut
- 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 - Lifetime
Links
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model relates to a combined screw which comprises a screw rod, a thread is arranged on the lower portion of the screw rod, the upper end of the screw rod is arranged to be a polish rod, the thread is arranged below the polish rod, a spring washer is arranged outside the polish rod, a flat washer is arranged below the spring washer, and the flat washer is limited through a nut or a preset thread hole, and the nut or the preset thread hole is arranged outside the thread. The diameter D of the polish rod is less than the bottom diameter of a thread tooth of the thread. The combined screw can be directly used in a connecting part of the nut or the preset thread hole, due to the fact that the diameter of the polish rod is less than the bottom diameter of the thread tooth, the nut or the preset thread hole can be enabled to planish a gasket, and mounting and using of products are not affected.
Description
Technical field
The utility model relates to a kind of screw, relates in particular to a kind of SEM screw SEM Scr.
Background technique
Screw is very much crucial as a kind of connection set of being convenient to mount and dismount.Existing screw is to cooperate screw rod by nut when mounted mostly, realizes connecting; But, when the pad below directly contacts screw thread, can flatten pad and cause puzzlement.Because the external diameter of the inner polished rod part of common SEM screw SEM Scr pad greater than the tooth of internal thread at the bottom of the footpath, can be blocked by polished rod so that the bullet pad can't flatten, cause SEM screw SEM Scr to lose due effect.
Summary of the invention
Technical problem to be solved in the utility model is, even a kind of SEM screw SEM Scr that compression spring is flattened is provided.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: this SEM screw SEM Scr comprises screw rod, described screw rod below is provided with screw thread, described screw rod upper-end part of driving is arranged to polished rod, screw thread is arranged on the polished rod below, described polished rod outer installment has spring washer, and the spring washer below is provided with plain washer, and plain washer is spacing by the nut or the pre-threaded hole that are arranged on threaded exterior.
For nut and pre-threaded hole can be flattened pad, further, the diameter D of described polished rod is less than the Bottom of Thread footpath of screw thread.
Compared with prior art, usefulness of the present utility model is: this SEM screw SEM Scr can directly be applied on the union piece with nut or pre-threaded hole, because the diameter of polished rod is less than the Bottom of Thread footpath on the screw rod, therefore, nut or pre-threaded hole are flattened pad, do not affect the installation and use of product.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the utility model SEM screw SEM Scr structural representation.
Among the figure: 1, screw rod; 2, spring washer; 3, plain washer; 4, screw thread; 5, polished rod.
Embodiment:
Below in conjunction with the drawings and the specific embodiments the utility model is described in detail:
A kind of SEM screw SEM Scr shown in Figure 1, has screw rod 1, described screw rod 1 below is provided with screw thread 4, be provided with polished rod 5 between screw thread 4 and screw rod 1 end, described polished rod 5 outer installment have spring washer 2, and spring washer 2 belows are provided with plain washer 3, and the diameter D of described polished rod 5 is less than the footpath, the end of worm tooth, thereby after guaranteeing that effectively nut or pre-threaded hole are installed on the screw rod 1, when screwing spring washer 3 is flattened.
This assembled nut applied range because therefore the diameter of polished rod 5, can make compression spring 2 is flattened less than the Bottom of Thread footpath on the screw rod 1, does not affect the installation and use of product.
It is emphasized that: above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.
Claims (2)
1. SEM screw SEM Scr, comprise screw rod (1), described screw rod (1) below is provided with screw thread (4), it is characterized in that: described screw rod (1) upper-end part of driving is arranged to polished rod (5), screw thread (4) is arranged on polished rod (5) below, described polished rod (5) outer installment has spring washer (2), and spring washer (2) below is provided with plain washer (3), and plain washer (3) is spacing by being arranged on screw thread (4) outside nut or pre-threaded hole.
2. SEM screw SEM Scr according to claim 1 is characterized in that: the diameter D of described polished rod (5) is less than the Bottom of Thread footpath of screw thread (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321718 CN202756394U (en) | 2012-07-05 | 2012-07-05 | Combined screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321718 CN202756394U (en) | 2012-07-05 | 2012-07-05 | Combined screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756394U true CN202756394U (en) | 2013-02-27 |
Family
ID=47735578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220321718 Expired - Lifetime CN202756394U (en) | 2012-07-05 | 2012-07-05 | Combined screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691872A (en) * | 2018-08-27 | 2018-10-23 | 江苏标五紧固件有限公司 | Combined screw |
-
2012
- 2012-07-05 CN CN 201220321718 patent/CN202756394U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691872A (en) * | 2018-08-27 | 2018-10-23 | 江苏标五紧固件有限公司 | Combined screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
|
| CX01 | Expiry of patent term |