CN2575372Y - Intermeshing's screw nut list is to structure of spiraling - Google Patents
Intermeshing's screw nut list is to structure of spiraling Download PDFInfo
- Publication number
- CN2575372Y CN2575372Y CN 02259177 CN02259177U CN2575372Y CN 2575372 Y CN2575372 Y CN 2575372Y CN 02259177 CN02259177 CN 02259177 CN 02259177 U CN02259177 U CN 02259177U CN 2575372 Y CN2575372 Y CN 2575372Y
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- CN
- China
- Prior art keywords
- nut
- screw rod
- groove
- intermeshing
- screw
- 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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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
A single-rotation-direction structure of a screw and a nut which are meshed with each other. An axial rectangular groove is arranged on a screw rod formed by a round rod with external threads; the nut is provided with internal threads meshed with the screw threads on the inner side of the screwable hollow cylinder and a plurality of axial sawtooth-shaped grooves which are uniformly distributed and in the same direction on the thread surface. A V-shaped spring piece is arranged in the rectangular groove of the screw rod, and the opening of the V-shaped spring piece is opposite to the radial surface of the sawtooth-shaped groove. When the sawteeth of the sawtooth-shaped groove are in the same direction with the threads, the nut can be screwed only and cannot be unscrewed; otherwise, the nut can only be unscrewed and can not be screwed.
Description
The utility model relates to a kind of intermeshing bolt and nut structure; Especially the intermeshing bolt and nut structure that can only screw towards a direction.
At present, the intermeshing bolt and nut structure that is widely used, screw rod is that externally threaded round bar is arranged, nut be have can with the twisted hollow cylinder of the internal thread of screw rod outside thread engagement.This intermeshing bolt and nut structure makes that screw rod can spinning in and out in nut, and nut can be unscrewed on screw rod and tightens.But in a lot of situations, needed is the intermeshing bolt and nut structure that can only screw towards a direction.As the fixing expansive screw of antitheft door net, actual demand be to tighten the intermeshing bolt and nut structure of unloading that can not unscrew, anti-.
The purpose of this utility model is: provide a kind of or nut can only be tightened, screw rod can only screw out; The intermeshing bolt and nut list rotation direction structure that nut can only be unscrewed, screw rod can only precession.
The purpose of this utility model is achieved in that axial rectangle groove of processing on the screw rod of bolt and nut structure now, processing some in the same way, equally distributed radial saw profile of tooth grooves on the nut inside thread face.Place one " V " shape spring sheet in the rectangle groove on screw rod, the opening of " V " shape spring sheet just in time sagittal plane with the zigzag fashion groove of nut inboard is relative.When the screw thread of the sawtooth of the zigzag fashion groove of nut inboard and nut in the same way the time, nut just can only tighten can not unscrew, screw rod can only screw out can not precession.When the screw thread of the sawtooth of the inboard zigzag fashion groove of nut and nut is reverse, nut just can only unscrew can not tighten, screw rod can only can not screw out in precession.
Owing to adopted above scheme, screw rod or nut just can only be screwed towards a direction, and simple in structure, cheap.
Can only tighten the embodiment that can not unscrew below in conjunction with the utility model nut is further described the utility model.
Fig. 1 the utility model nut can only be tightened the plan view that can not unscrew embodiment
Fig. 2 Figure 1A-A sectional drawing
1. nuts, 2. screw rods, 3. rectangle groove 4. " V " shape spring sheets, 5. zigzag fashion grooves among the figure
In Fig. 1, Fig. 2, the internal thread of the outside thread of screw rod (2) and nut (1) is meshing with each other.Axial rectangle groove (3) is arranged on screw rod (2), radial saw profile of tooth groove (5) is arranged on nut (1), zigzag fashion groove (5) be in the same way and flank of thread that be evenly distributed in nut (1) on." V " shape spring sheet (4) is placed in the rectangle groove (3) of screw rod (2), and the sagittal plane of the zigzag fashion groove (5) on the nut (1) is just in time relative with its opening.Axial rectangle groove (3) on the screw rod (2) is to finish slightly high position from the screw rod upper-end surface to distance screw rod (2) screw thread; The inboard radial saw profile of tooth groove (5) of nut (1) is that lower end surface from nut (1) is to being about 2～3 apart from the nut upper-end surface
MmThe position.Groove on the present embodiment (5) is three, can be the groove (5) of other number in the reality.When clockwise fastening nut (1), stuck effect can not take place with groove (5) in spring sheet (4); Radially two walls of groove (3) prevent that the frictional force that produces when nut (1) rotates from making " V " shape spring sheet (4) rotate the face displacement simultaneously.When nut (1) when tightening, the internal thread of nut (1) and spring sheet (4) interact " V " shape spring sheet (4) are produced axially to bottom offset.Nut this moment (1) can be tightened.When counterclockwise unscrewing nut (1), stuck effect takes place with groove (5) in spring sheet (4), and nut can not be unscrewed.
Claims (2)
1. intermeshing bolt and nut structure, screw rod is for there being externally threaded round bar, nut is the twisted hollow cylinder that has with the intermeshing internal thread of screw rod outside thread, it is characterized in that: an axial rectangle groove is arranged on screw rod, on the inside thread face of nut, be evenly distributed with some radial saw profile of tooth grooves in the same way; One " V " shape spring sheet is arranged in the rectangle groove on screw rod, and the sagittal plane of the zigzag fashion groove on the opening of " V " shape spring sheet and the nut is relative.
2. intermeshing bolt and nut structure according to claim 1, it is characterized in that: the rectangle groove on the screw rod is to finish slightly high position from the top end of screw rod to screw flight, and the zigzag fashion groove on the nut is that lower end surface from nut is to distance nut upper-end surface about 2～3
MmThe position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259177 CN2575372Y (en) | 2002-10-07 | 2002-10-07 | Intermeshing's screw nut list is to structure of spiraling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259177 CN2575372Y (en) | 2002-10-07 | 2002-10-07 | Intermeshing's screw nut list is to structure of spiraling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2575372Y true CN2575372Y (en) | 2003-09-24 |
Family
ID=33726678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02259177 Expired - Fee Related CN2575372Y (en) | 2002-10-07 | 2002-10-07 | Intermeshing's screw nut list is to structure of spiraling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2575372Y (en) |
-
2002
- 2002-10-07 CN CN 02259177 patent/CN2575372Y/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 | ||
| 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 |