CN203384182U - Screw for draw-bar box - Google Patents
Screw for draw-bar box Download PDFInfo
- Publication number
- CN203384182U CN203384182U CN201320451587.9U CN201320451587U CN203384182U CN 203384182 U CN203384182 U CN 203384182U CN 201320451587 U CN201320451587 U CN 201320451587U CN 203384182 U CN203384182 U CN 203384182U
- Authority
- CN
- China
- Prior art keywords
- nut
- screw
- screw cap
- protection pad
- pad sheet
- 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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- Moulds, Cores, Or Mandrels (AREA)
Abstract
The utility model discloses a screw for a draw-bar box, which comprises a threaded shank and a screw cap integrally connected with the threaded shank, wherein a protective gasket is arranged between the threaded shank and the screw cap, and is integrally formed and connected with the threaded shank and the screw cap; a groove is formed in the center of the screw cap; a bearing hole is formed in the center of the groove; the inner wall surface of the groove and the upper surface of the screw cap are in smooth connection; an arc edge for smooth transition is formed at the joint of the upper surface and the annular side surface of the screw cap; the annular side surface of the screw cap and the upper surface of the protective gasket are in smooth connection; an arc edge for smooth transition is formed at the joint of the upper surface and the annular side surface of the protective gasket. According to the utility model, on one hand, the diameter of the protective gasket is more than two times that of the screw cap, so that the stress area of the screw cap in the screw is greatly enlarged, the screw cap can be effectively prevented from penetrating the contact surface, and the service life of the draw-bar box is prolonged; on the other hand, the screw in use can be effectively prevented from scratching a human body by virtue of arc smooth transition.
Description
Technical field
The utility model relates to the screw technical field, refers in particular to a kind of pulling box screw.
Background technique
Along with the use of pulling box is more and more, the quality requirement of pulling box is also more and more higher, for the installation screw on pulling box, quality to pulling box plays important effect, in the process of installing at screw, need to be by screw tightening, twist tighter just more firmly, yet twist tightlyer, nut tend in screw is absorbed in the housing of pulling box, in use, and can be because stressed excessive or use of a specified duration, screw penetrates housing and damages associated components and causes this pulling box to go out of use, and has reduced the working life of pulling box.This is mainly because the nut lifting surface area of existing screw is too small, to make nut follow thread handle to pierce together in surface of contact, and on the other hand, existing pulling box, accidentally will be pointed not through processing with screw in scratch.
The model utility content
In view of this, the utility model is for the disappearance of prior art existence, and its main purpose is to provide a kind of lifting surface area greatly and prevents from scratching the pulling box screw of human body, and it can effectively improve the working life of pulling box.
For achieving the above object, the utility model adopts following technological scheme: a kind of pulling box screw, the nut that includes thread handle and be connected with the thread handle one, be provided with a protection pad sheet between described thread handle and nut, this protection pad sheet is connected with thread handle and nut are one-body molded, this nut central part is provided with a groove, this groove center is provided with one and holds hole, the internal face of this groove is round and smooth with the upper surface of nut and is connected, the joint of this nut upper surface and annular side forms the arc-shaped side edge of rounding off, the annular side of this nut is round and smooth with the upper surface of this protection pad sheet and is connected, the upper surface of this protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.
As a kind of preferred version, the described hole of holding is the cross hole of holding.
As a kind of preferred version, the diameter of described groove equals the diameter of thread handle.
As a kind of preferred version, more than the twice that the diameter of described protection pad sheet is the nut diameter.
As a kind of preferred version, the lower surface of described protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.
The utility model compared with prior art has obvious advantage and beneficial effect,
The design of this screw is mainly manifested in this protection pad sheet and is connected with thread handle and nut are one-body molded, more than the twice that the diameter of described protection pad sheet is the nut diameter, greatly improve the lifting surface area of nut in the screw, can effectively prevent that nut from piercing surface of contact, improved the working life of pulling box.
The groove internal face of this nut central part is round and smooth with the upper surface of nut and is connected, the joint of this nut upper surface and annular side forms the arc-shaped side edge of rounding off, the annular side of this nut is round and smooth with the upper surface of this protection pad sheet and is connected, and the upper surface of this protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.The lower surface of described protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.By the rounding off of arc, can effectively prevent that this screw from scratching human body in the process of using.
The accompanying drawing explanation
Fig. 1 is the schematic perspective view of screw in the utility model embodiment;
Fig. 2 is the sectional drawing of screw in the utility model embodiment.
The accompanying drawing identifier declaration:
10, thread handle
20, nut
21, groove
22, hold hole
30, protection pad sheet.
Embodiment
Please refer to shown in Fig. 1 to Fig. 2, it has shown the concrete structure of the preferred embodiment of the utility model, a kind of pulling box screw, the nut 20 that includes thread handle 10 and be connected with thread handle 10 one, be provided with a protection pad sheet 30 between described thread handle 10 and nut 20, this protection pad sheet 30 is connected with nut 20 is one-body molded with thread handle 10.
Wherein, these nut 20 central parts are provided with a groove 21, these groove 21 centers are provided with the cross hole 22 of holding, the internal face of this groove 21 is round and smooth with the upper surface of nut and is connected, the joint of these nut 10 upper surfaces and annular side forms the arc-shaped side edge of rounding off, the annular side of this nut 10 is round and smooth with the upper surface of this protection pad sheet 30 and is connected, and the upper surface of this protection pad sheet 30 and the joint of annular side form the arc-shaped side edge of rounding off.
The diameter of this groove 21 equals the diameter of thread handle 20.
More than the twice that the diameter of this protection pad sheet 30 is nut 10 diameters.
The lower surface of this protection pad sheet 30 and the joint of annular side form the arc-shaped side edge of rounding off.
Design focal point of the present utility model is: the design of this screw is mainly manifested in this protection pad sheet and is connected with thread handle and nut are one-body molded, more than the twice that the diameter of described protection pad sheet is the nut diameter, greatly improved the lifting surface area of nut in the screw, can effectively prevent that nut from piercing surface of contact, improve the working life of pulling box.
The groove internal face of this nut central part is round and smooth with the upper surface of nut and is connected, the joint of this nut upper surface and annular side forms the arc-shaped side edge of rounding off, the annular side of this nut is round and smooth with the upper surface of this protection pad sheet and is connected, and the upper surface of this protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.The lower surface of described protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.By the rounding off of arc, can effectively prevent that this screw from scratching human body in the process of using.
The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model is imposed any restrictions, therefore every foundation technical spirit of the present utility model, to any trickle modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model.
Claims (5)
1. a pulling box screw, the nut that includes thread handle and be connected with the thread handle one, it is characterized in that: be provided with a protection pad sheet between described thread handle and nut, this protection pad sheet is connected with thread handle and nut are one-body molded, this nut central part is provided with a groove, this groove center is provided with one and holds hole, the internal face of this groove is round and smooth with the upper surface of nut and is connected, the joint of this nut upper surface and annular side forms the arc-shaped side edge of rounding off, the annular side of this nut is round and smooth with the upper surface of this protection pad sheet and is connected, the upper surface of this protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.
2. a kind of pulling box screw according to claim 1, it is characterized in that: the described hole of holding is the cross hole of holding.
3. a kind of pulling box screw according to claim 1, it is characterized in that: the diameter of described groove equals the diameter of thread handle.
4. a kind of pulling box screw according to claim 1, is characterized in that: more than the twice that the diameter of described protection pad sheet is the nut diameter.
5. a kind of pulling box screw according to claim 1, it is characterized in that: the lower surface of described protection pad sheet and the joint of annular side form the arc-shaped side edge of rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451587.9U CN203384182U (en) | 2013-07-29 | 2013-07-29 | Screw for draw-bar box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451587.9U CN203384182U (en) | 2013-07-29 | 2013-07-29 | Screw for draw-bar box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384182U true CN203384182U (en) | 2014-01-08 |
Family
ID=49872679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320451587.9U Expired - Fee Related CN203384182U (en) | 2013-07-29 | 2013-07-29 | Screw for draw-bar box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384182U (en) |
-
2013
- 2013-07-29 CN CN201320451587.9U patent/CN203384182U/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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 523451 Guangdong province Dongguan Dongkeng Dongkeng Avenue North, No. 82 Patentee after: Guangdong Binhao Technology Co.,Ltd. Address before: 523000 Guangdong province Dongguan Dongkeng Dongkeng Avenue North, No. 82 Guangdong Binhao Travel Products Co. Ltd. Patentee before: GUANGDONG BINHAO TRAVELWARE Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |