CN203201937U - Screw with multilayer protection - Google Patents
Screw with multilayer protection Download PDFInfo
- Publication number
- CN203201937U CN203201937U CN 201320154132 CN201320154132U CN203201937U CN 203201937 U CN203201937 U CN 203201937U CN 201320154132 CN201320154132 CN 201320154132 CN 201320154132 U CN201320154132 U CN 201320154132U CN 203201937 U CN203201937 U CN 203201937U
- Authority
- CN
- China
- Prior art keywords
- screw
- multilayer
- protecting jacket
- multilayer protection
- utility
- 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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Abstract
The utility model provides a screw with multilayer protection. The screw with the multilayer protection comprises a screw cap and a threaded rod, wherein the threaded rod is arranged at the lower end of the screw cap, a screw head is arranged on the lower portion of the threaded rod, a groove is formed in the upper end of the screw cap, self-tapping threads are arranged on the outer edge of the threaded rod, and a multilayer protective sleeve is arranged on the outer layer of the screw head. According to the screw with the multilayer protection, the arrangement of the multilayer protective sleeve enables the screw to be firmer and more durable, and the service life of the screw is prolonged.
Description
Technical field
The utility model relates to a kind of fastening piece, particularly a kind of screw of multilayer protection.
Background technique
Screw is a class fastening piece that is made of head and screw rod two-part, can be divided three classes by purposes: machine screw, Cock screw and specific use screw, machine screw is mainly used in the part of a clamp screw pit, and one with being fastenedly connected between the part of through hole, (this Connecting format is called screw and connects, and also belongs to removably connect not need the nut cooperation; Also can cooperate with nut, be used for two with being fastenedly connected between the part of through hole.) Cock screw is mainly used in fixing two relative positions between the part, the specific use screw is such as lifting bolt etc. being arranged for the lifting part.
Screw commonly used fixedly the time, generally needs larger power with object, in case strength is excessive, the phenomenon that ruptures of appearance usually causes the fault of machine, has affected the working life of machine.
Summary of the invention
For addressing the above problem, the utility model discloses a kind of screw of multilayer protection, the setting of multilayer protective coating makes more firm and durable of screw, and prolongs the working life of screw.
The utility model provides a kind of screw of multilayer protection, comprises screw cap, screw rod, and described screw cap lower end is provided with screw rod; below described screw rod, be provided with screw head; described screw cap upper end is provided with groove, and described screw rod outer rim is provided with Thread Forming TF, is provided with multilayer protective coating at described screw head skin.The purpose of this utility model designs a kind of screw of multilayer protection, and the setting of multilayer protective coating makes more firm and durable of screw; and the working life of prolongation screw, when first layer protecting jacket breaking releasing, only need the first layer protecting jacket is backed out; change new protecting jacket, easy to use.
The utility model discloses a kind of a kind of improvement of screw of multilayer protection, described protecting jacket is at least 1 layer.This improvement can change the number of protective layer according to client's demand, and the more screws of protective layer are more firm.
The utility model discloses a kind of a kind of improvement of screw of multilayer protection, described protecting jacket all arranges along the outer of screw head.This improvement arranges the outer of protecting jacket along screw head, and protecting jacket and screw head are fitted tightly, and makes more firm and durable of screw, thereby prolongs its working life.
The purpose of this utility model designs a kind of screw of multilayer protection, and the setting of multilayer protective coating makes more firm and durable of screw; and the working life of prolongation screw, when first layer protecting jacket breaking releasing, only need the first layer protecting jacket is backed out; change new protecting jacket, easy to use.
Description of drawings
Fig. 1, be the structural representation of the screw of a kind of multilayer protection.
Reference numerals list:
11, screw cap;
21, screw rod;
31, screw head;
41, protecting jacket;
51, Thread Forming TF;
61, groove.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand following embodiment and only be used for explanation the utility model and be not used in restriction scope of the present utility model.Need to prove, word 'fornt', 'back', " left side ", " right side ", "up" and "down" that use is described below refer to the direction in the accompanying drawing, word " interior " and " outward " refer to respectively towards or away from the direction of particular elements geometrical center.
Embodiment 1:
As shown in Figure 1; the utility model provides a kind of screw of multilayer protection; comprise screw cap 11, screw rod 21; described screw cap 11 lower ends are provided with screw rod 21; below described screw rod 21, be provided with screw head 31; described screw cap 11 upper ends are provided with groove 61, and described screw rod 21 outer rims are provided with Thread Forming TF 51, are provided with multilayer protective coating 41 at described screw head 31 skins.The purpose of this utility model designs a kind of screw of multilayer protection, and the setting of multilayer protective coating makes more firm and durable of screw; and the working life of prolongation screw, when first layer protecting jacket breaking releasing, only need the first layer protecting jacket is backed out; change new protecting jacket, easy to use.
Embodiment 2:
The screw of embodiment's 1 described a kind of multilayer protection, described protecting jacket 41 is at least 1 layer.This improvement can change the number of protective layer according to client's demand, and the more screws of protective layer are more firm.
Embodiment 3:
The screw of embodiment's 1 described a kind of multilayer protection, described protecting jacket 41 all arranges along the outer of screw head 31.This improvement arranges the outer of protecting jacket along screw head, and protecting jacket and screw head are fitted tightly, and makes more firm and durable of screw, thereby prolongs its working life.
The purpose of this utility model designs a kind of screw of multilayer protection, and the setting of multilayer protective coating makes more firm and durable of screw; and the working life of prolongation screw, when first layer protecting jacket breaking releasing, only need the first layer protecting jacket is backed out; change new protecting jacket, easy to use.
The above; it only is preferred embodiment of the present utility model; be not to be the restriction of the utility model being made any other form, and according to any modification or equivalent variations that technical spirit of the present utility model is done, still belong to the utility model scope required for protection.
Claims (3)
1. the screw of multilayer protection; it is characterized in that: comprise screw cap (11), screw rod (21); described screw cap (11) lower end is provided with screw rod (21); be provided with screw head (31) in described screw rod (21) below; described screw cap (11) upper end is provided with groove (61); described screw rod (21) outer rim is provided with Thread Forming TF (51), is provided with multilayer protective coating (41) at described screw head (31) skin.
2. the screw of a kind of multilayer protection according to claim 1, it is characterized in that: described protecting jacket (41) is at least 1 layer.
3. the screw of a kind of multilayer protection according to claim 1, it is characterized in that: described protecting jacket (41) all arranges along the outer of screw head (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154132 CN203201937U (en) | 2013-04-01 | 2013-04-01 | Screw with multilayer protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154132 CN203201937U (en) | 2013-04-01 | 2013-04-01 | Screw with multilayer protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203201937U true CN203201937U (en) | 2013-09-18 |
Family
ID=49146048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320154132 Expired - Fee Related CN203201937U (en) | 2013-04-01 | 2013-04-01 | Screw with multilayer protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203201937U (en) |
-
2013
- 2013-04-01 CN CN 201320154132 patent/CN203201937U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20140401 |