CN201330781Y - Lock screw - Google Patents
Lock screw Download PDFInfo
- Publication number
- CN201330781Y CN201330781Y CNU2009201120630U CN200920112063U CN201330781Y CN 201330781 Y CN201330781 Y CN 201330781Y CN U2009201120630 U CNU2009201120630 U CN U2009201120630U CN 200920112063 U CN200920112063 U CN 200920112063U CN 201330781 Y CN201330781 Y CN 201330781Y
- Authority
- CN
- China
- Prior art keywords
- screw
- head
- thread
- screw rod
- locking
- 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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- Connection Of Plates (AREA)
Abstract
This utility model discloses a lock screw, to provide a lock screw with a simple structure, reliable connection, which is not easy to loosen and is convenient to manufacture, including a screw and a screw head connected to the tail end of the screw. The screw is provided with screw thread divided into two sections, where one section is disposed on the head portion of the screw, while the other section is close to the screw head, and the screw thread on the head portion of the screw is opposite to the screw thread close to the screw head in a direction of turning. According to the utility model, with opposite directions of turning of the front and rear two sections of screw threads, when the screw is screwed in a workpiece or a plastic expansion pipe wholly, the screw thread close to the screw head is provided with a function of stopping and can avoid loosening. The screw will not withdraw or loosen automatically with reliable connection on the working condition with no external rotary force. The locking screw with this structure can be applied widely as self tapping screws, lag wood screws or screws in plastic expansion.
Description
Technical field
The utility model relates to a kind of screw, relates in particular to tapping screw or wood screw or is used for the screw of plastic expansion.
Background technique
Tapping screw or wood screw or the screw that is used for plastic expansion as link use very general, they are drilled into screw in the workpiece by the rotating screw head, make screw with workpiece or by screw a plurality of workpiece are connected.These common screws are made up of with the screw head that is connected with screw rod screw rod, are shaped on the screw thread of consecutive identical rotation direction on the screw rod.Such screw is easier to become flexible having under the situation of vibrations.
Summary of the invention
The purpose of this utility model is to solve the shortcoming that exists in the existing product, provide a kind of simple in structure, connect reliable, be difficult for loosening, easy to manufacture, easy to use a kind of locking screw.
In order to reach above-mentioned requirements, the utility model is achieved in that it includes screw rod and forms with the screw head that is connected with the screw rod tail end, be shaped on screw thread on the screw rod, it is characterized in that described screw thread has two sections, one section screw thread is at the head of screw rod, the nearly screw head of another section screw thread, the head threads of screw rod is opposite with the thread rotary orientation of nearly screw head.
A kind of locking screw according to the such scheme manufacturing, advantage is because the two sections thread rotary orientations in front and back are opposite, when this screw all is screwed into workpiece or plastic expansion Guan Zhonghou, screw thread at nearly screw head can play retaining and locking effect, do not having under the operating mode of external rotating force, screw can not withdraw from and become flexible automatically, connects reliable.The locking screw of this kind structure can be widely used as tapping screw or wood screw or be used for the screw of plastic expansion.
Description of drawings
Fig. 1 is shaped on a kind of locking screw plan view of cross recessed above the screw head;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the screw head plan view of straight groove;
Fig. 4 is hexagonal screw head plan view.
Wherein: 1, screw rod; 2, screw head; 3, the head threads of screw rod; 4, the screw thread of nearly screw head; 5, cross recess; 6, straight groove.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Find out from Fig. 1, Fig. 2, it includes screw rod 1 and the screw head 2 that is connected with the screw rod tail end is formed a kind of locking screw, is shaped on two sections screw threads on the screw rod 1, and one section screw thread is at the head of screw rod 1, the nearly screw head 2 of another section screw thread, the head threads 3 of screw rod is opposite with screw thread 4 rotation directions of nearly screw head.Head threads 3 length of described screw rod are greater than screw thread 4 length of nearly screw head, and head threads 3 rotation directions of screw rod are dextrorotation, and screw thread 4 rotation directions of nearly screw head are left-handed.Be shaped on cross recess 5 above the described screw head 2 or be shaped on straight groove 6 as shown in Figure 3, also can make screw head 1 as shown in Figure 4 hexagonal.
Claims (5)
1, a kind of locking screw includes screw rod and forms with the screw head that is connected with the screw rod tail end, is shaped on screw thread on the screw rod, it is characterized in that described screw thread has two sections, one section screw thread is at the head of screw rod, the nearly screw head of another section screw thread, and the head threads of screw rod is opposite with the thread rotary orientation of nearly screw head.
2, a kind of locking screw according to claim 1 is characterized in that the reach of the head threads length of described screw rod greater than nearly screw head.
3, a kind of locking screw according to claim 1, the head threads rotation direction that it is characterized in that described screw rod is dextrorotation.
4, a kind of locking screw according to claim 1 is characterized in that being shaped on above the described screw head cross recess or straight groove.
5, a kind of locking screw according to claim 1 is characterized in that described screw head makes hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201120630U CN201330781Y (en) | 2009-01-04 | 2009-01-04 | Lock screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201120630U CN201330781Y (en) | 2009-01-04 | 2009-01-04 | Lock screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330781Y true CN201330781Y (en) | 2009-10-21 |
Family
ID=41224161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201120630U Expired - Fee Related CN201330781Y (en) | 2009-01-04 | 2009-01-04 | Lock screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330781Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050869A (en) * | 2016-06-27 | 2016-10-26 | 无锡迪奥机械有限公司 | Fitting and fastening bolt for woodwork |
| CN111851911A (en) * | 2020-08-07 | 2020-10-30 | 东莞格美智宅建筑装饰有限公司 | Enhanced type external hanging piece for paving medium and large-sized wall tiles and application thereof |
-
2009
- 2009-01-04 CN CNU2009201120630U patent/CN201330781Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050869A (en) * | 2016-06-27 | 2016-10-26 | 无锡迪奥机械有限公司 | Fitting and fastening bolt for woodwork |
| CN111851911A (en) * | 2020-08-07 | 2020-10-30 | 东莞格美智宅建筑装饰有限公司 | Enhanced type external hanging piece for paving medium and large-sized wall tiles and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiashan Yongda screw Co. Ltd. Assignor: Xu Minfei Contract record no.: 2010330002220 Denomination of utility model: Lock screw Granted publication date: 20091021 License type: Exclusive License Record date: 20101203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20170104 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |