CN201170241Y - Convex screw-down structure stud - Google Patents
Convex screw-down structure stud Download PDFInfo
- Publication number
- CN201170241Y CN201170241Y CNU200720088911XU CN200720088911U CN201170241Y CN 201170241 Y CN201170241 Y CN 201170241Y CN U200720088911X U CNU200720088911X U CN U200720088911XU CN 200720088911 U CN200720088911 U CN 200720088911U CN 201170241 Y CN201170241 Y CN 201170241Y
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- CN
- China
- Prior art keywords
- double
- screw bolt
- evagination
- stud
- 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 - Lifetime
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- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
A stud with a convex screwing structure is characterized in that a convex screwing head which has a radial dimension smaller than the minor diameter of the thread of the stud and can be matched with a screwing tool is arranged on the end face of one end of a common stud assembling and screwing device. The utility model discloses can directly use tightening tool such as spanner, sleeve to screw up at the evagination tightening head of double-screw bolt tip during the assembly, reduce workman intensity of labour, improve the assembly of double-screw bolt, dismantle efficiency. The control of the assembly moment of the stud screwed into the threaded hole can be realized by applying an opening torque control tool, and the assembly precision of the stud is improved.
Description
Technical field
The utility model relates to the threaded fastener technology field, relates in particular to a kind of evagination and tightens the structure double-screw bolt.
Background technique
In mechanical coupling and automobile critical piece assembling connection, double-screw bolt is widely used.See Fig. 1 double-screw bolt product structure figure for details.
When double-screw bolt connects in assembling, need earlier double-screw bolt to be screwed in the tapped hole of an end coupling.See for details shown in Fig. 2 double-screw bolt assembly structure figure.
According to China Standard Press's in March, 2006 front page " fastening piece standard implementation guide ": an end of double-screw bolt utilizes interference or other method to be screwed into and to be securely fixed in the endoporus of workpiece substrate, and matrix is linked by double-screw bolt and nut.
The NBS relevant with the double-screw bolt product has GB897, GB898, GB899, GB900, GB901 at present.
Because the place of turning round is not all executed on the double-screw bolt surface of these GB regulations at present, causes double-screw bolt can only be screwed into tapped hole with hand-held double-screw bolt when being screwed into tapped hole.
Cooperate tighter occasion with tapped hole for double-screw bolt, these double-screw bolts can't directly be used tightening tool; Be screwed into the occasion that tapped hole moment has requirement for double-screw bolt, these double-screw bolts also can't directly be used and turn round the instrument assembling surely.Cause double-screw bolt assembling, the dismounting of present this form very inconvenient, efficiency of assembling is lower.
As in the assembling of DCI 11 motors, the moment that double-screw bolt is screwed into tapped hole all has clear and definite requirement.
Cooperate tighter occasion with tapped hole for double-screw bolt, particularly double-screw bolt is screwed into the occasion that tapped hole moment has requirement, the double-screw bolt of present this form can only adopt other method to carry out indirect tightening and Torque Control, as adopt double nut to assist and tighten, earlier execute the section of turning round and be screwed into two nuts at double-screw bolt, tighten the nut of pre-installing on the double-screw bolt during assembling, treat double nut to be backed out from double-screw bolt after double-screw bolt is screwed into tapped hole again, such assembling is very loaded down with trivial details.And when double nut is back-outed, through regular meeting that double-screw bolt is loosening, destroy the screw-down torque of double-screw bolt, so influenced the control accuracy of double-screw bolt assembly quality and assembling moment.
The model utility content
The purpose of this utility model is in order to solve the deficiency that the above-mentioned background technology exists, to propose a kind of band evagination that can adopt tightening tool to carry out tightening operation and tighten the structure double-screw bolt, make its assembly precision that can improve double-screw bolt and efficient, reducing labor strength.
For achieving the above object, the utility model adopts following technological scheme: a kind of evagination is tightened the structure double-screw bolt, it is characterized in that this double-screw bolt is a radial dimension to be set less than double-screw bolt screw thread path, and the evagination tappet head that can cooperate with tightening tool at the end face that an end of turning round is executed in the assembling of common double-screw bolt.
Described evagination tappet head can be prism, this prism axis and double-screw bolt dead in line.
The preferred four prisms cylinder of described evagination tappet head, hexagonal prism, eight prisms or 12 prisms, each prismatic surface of above-mentioned prism is in evenly distribution and symmetrical in twos of circumferencial direction.
In such scheme, the cross section of described evagination tappet head can also be flower type cross section cylinder.
The utility model is simple in structure, easy to use, especially adopt the evagination tappet head that can cooperate with tightening tool, make it when assembling, can directly use tightening tool such as spanner and tighten at the evagination tappet head of stud end, reduce labor strength, improve assembling, the removal efficiency of double-screw bolt.Simultaneously, can also use the opening control and turn round the control that instrument realization double-screw bolt is screwed into the assembling moment of tapped hole, improve the assembly precision of double-screw bolt.
Description of drawings
Fig. 1 is existing common double-screw bolt product structure figure.
Fig. 2 is existing common double-screw bolt assembly structure figure.
Fig. 3 is the structural drawing of double-screw bolt product described in the utility model.
Fig. 4 is the left view of Fig. 3.
Embodiment
With reference to Fig. 3 and Fig. 4, double-screw bolt described in the utility model is a radial dimension to be set less than double-screw bolt screw thread path, and the evagination tappet head 3 that can cooperate with tightening tool (as: the jaw position of spanner, the sleeve position of socket wrench) at the end face 2 that an end of turning round is executed in 1 assembling of common double-screw bolt.This evagination tappet head 3 is for prism or spend the tee section cylinder maybe can execute the cylinder of turning round, this column axis and double-screw bolt dead in line.Described evagination tappet head 3 is preferably four prisms cylinder, hexagonal prism, eight prisms or 12 prisms (Fig. 3 and Fig. 4 are hexagonal prism), and each prismatic surface of above-mentioned prism is in evenly distribution and symmetrical in twos of circumferencial direction.
Double-screw bolt described in the utility model is convenient to use existing spanner commonly used because of its evagination tappet head 3 and is tightened, and therefore when double-screw bolt assembles, can use tightening tools such as spanner or open-end wrench to tighten double-screw bolt very easily.The very similar bolt that screws up with a wrench of its effect, very convenient, the while has also been improved assembling, the removal efficiency of double-screw bolt.Be screwed into the occasion that tapped hole moment has requirement for double-screw bolt, the also very convenient application of turning round instrument surely of the utility model can directly use opening wrest fixing spanner or sleeve to tighten, and improves the assembly quality of double-screw bolt.
Claims (3)
1, a kind of band evagination is tightened the structure double-screw bolt, it is characterized in that this double-screw bolt is a radial dimension to be set less than double-screw bolt screw thread path, and the evagination tappet head that can cooperate with tightening tool at the end face that an end of turning round is executed in the assembling of common double-screw bolt.
2, a kind of evagination according to claim 1 is tightened the structure double-screw bolt, it is characterized in that described evagination tappet head is a prism, this prism axis and double-screw bolt dead in line.
3, a kind of evagination according to claim 2 is tightened the structure double-screw bolt, it is characterized in that described evagination tappet head is four prisms cylinder, hexagonal prism, eight prisms or 12 prisms, and each prismatic surface of above-mentioned prism is in evenly distribution and symmetrical in twos of circumferencial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720088911XU CN201170241Y (en) | 2007-12-11 | 2007-12-11 | Convex screw-down structure stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720088911XU CN201170241Y (en) | 2007-12-11 | 2007-12-11 | Convex screw-down structure stud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170241Y true CN201170241Y (en) | 2008-12-24 |
Family
ID=40209294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720088911XU Expired - Lifetime CN201170241Y (en) | 2007-12-11 | 2007-12-11 | Convex screw-down structure stud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170241Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994747A (en) * | 2009-08-14 | 2011-03-30 | 杨泰和 | Sun gear coaxial drive screw nut structure and its driven stud structure |
| CN102384145A (en) * | 2011-06-28 | 2012-03-21 | 无锡舜特金属制品有限公司 | Double-screw bolt with screwing wrench structure |
-
2007
- 2007-12-11 CN CNU200720088911XU patent/CN201170241Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994747A (en) * | 2009-08-14 | 2011-03-30 | 杨泰和 | Sun gear coaxial drive screw nut structure and its driven stud structure |
| CN102384145A (en) * | 2011-06-28 | 2012-03-21 | 无锡舜特金属制品有限公司 | Double-screw bolt with screwing wrench structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGFENG COMMERCIAL VEHICLE CO., LTD. Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD. Effective date: 20130917 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430054 WUHAN, HUBEI PROVINCE TO: 442001 SHIYAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130917 Address after: 442001 Shiyan City, Hubei province city Zhangwan District Road No. 2 Patentee after: DONGFENG TRUCKS Co.,Ltd. Address before: 430054 No. 10 Dongfeng Avenue, Zhuankou economic and Technological Development Zone, Wuhan, Hubei, Hanyang Patentee before: DONGFENG MOTER Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081224 |
|
| CX01 | Expiry of patent term |