CN201232693Y - Hollow bolt with left hand thread structure - Google Patents
Hollow bolt with left hand thread structure Download PDFInfo
- Publication number
- CN201232693Y CN201232693Y CNU2008201620393U CN200820162039U CN201232693Y CN 201232693 Y CN201232693 Y CN 201232693Y CN U2008201620393 U CNU2008201620393 U CN U2008201620393U CN 200820162039 U CN200820162039 U CN 200820162039U CN 201232693 Y CN201232693 Y CN 201232693Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- thread
- bolt body
- hollow
- threaded body
- 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
Links
Images
Landscapes
- Connection Of Plates (AREA)
Abstract
The utility model discloses a hollow bolt provided with a left-hand thread structure, which includes a bolt body; the bolt body is provided with a head part, a middle rod part and a tail part; the head part is provided with a first thread body; and the tail part is provided with a second thread body; wherein, the bolt body is provided with at least one inner cavity with a hollow round hole which is shaped by cold heading and penetrated; both the effective lengths of the first thread body and the second thread body are at least equal to the diameter value of the bolt body; the middle rod part is a round shaft; the first thread body and the second thread body have the opposite thread rotating directions which can adapt the assembly of two different directions; a round hole cavity is arranged in the axis of the bolt body; under the situation of maintaining the intensity of the integral structure, the rigidity of a bolt piece is effectively improved and the inner strain of the bent part of the bolt piece is enhanced; the round hole cavity is arranged in the axis of the bolt body, thus solving the problem of the poorer heat treatment permeability of the axis and improving the heat treatment effect of the bolt body.
Description
Technical field
The utility model relates to the technical field of fastening piece in the five metals element, and particularly a kind of have a left-hand thread structure of hollow bolt.
Background technique
General bolt fastener traditionally mostly is the solid body structure, also use widely than tool, but the whole relatively weight of the bolt arrangement of solid body is bigger, and big weight directly can cause the raising of cost, is unfavorable for the saving of resource; Also have big weight also can bring the increase of being joined object weight; The solid body structure is when heat treatment, and the permeability in axle center is relatively poor.
But also having the bolt of half special-purpose hollow structure, is Chinese utility model patent " the sleeve bolt " (notification number: CN2612832Y) this type of design is arranged of ZL03229829.3 as number of patent application; Profile is the beer ampuliform, and top is screwed screw rod, and the bottom is the hollow sleeve of hole enlargement, and the sleeve circumference has 3-5 groove that is used to weld along the sleeve generatrix direction.In addition, notification number: CN2584911Y China utility model patent " cydariform EXPANSION ANCHOR BOLTS " is provided with bolt, expand tube and nut, establishes at least 2 penetration holes along axial direction at the middle part of expand tube, and penetration hole is preferably flat.When nut and cylinder head bolt locking, expand tube is under the effect of axial compression power, and its weakness produces radial displacement immediately, because the expand tube inwall is subjected to the obstruction of bolt, expand tube can only outwards be expanded, and forms drum shape until reaching the fixing purpose of swelling.Obviously, only be only applicable to adopt the building of hollow brick.The special bolt in special use occasion is mainly considered in above-mentioned design, does not have and the general function of present society's circulation bolt, so do not have the possibility of batch process; And this structure only relates to the part hollow structure, and hollow design is not carried out in the double thread attachment portion yet, so use on the performance of section the structure with present solid bolt identical at screw thread, do not have bigger difference.
Summary of the invention
Technical problem to be solved in the utility model is the present situation at prior art, provide a kind of rational in infrastructure, in light weight, rigidity is effective, the crimped section internal stress reach by force thermal effectiveness good have a left-hand thread structure of hollow bolt.
The technological scheme that the utility model technical solution problem is adopted is: have left-hand thread structure of hollow bolt, comprise bolt body, bolt body has head section, king-rod portion and rear; The head section is shaped on first threaded body, and rear is shaped on second threaded body; Wherein: bolt body is shaped at least one along the axle center be the interior die cavity of circular hole through hollow cold upset forming and that connect; The effective length of first threaded body and second threaded body all equals the diameter value of bolt body at least; King-rod portion is a circular shaft, and first threaded body and second threaded body have the opposite threads rotation direction.
Compared with prior art, be shaped at least one along the axle center be the interior die cavity of circular hole through hollow cold upset forming and that connect to the utility model bolt body; The effective length of first threaded body and second threaded body all equals the diameter value of bolt body at least; King-rod portion is a circular shaft, and first threaded body and second threaded body have the opposite threads rotation direction.Advantage of the present utility model is: the opposite threads rotation direction can adapt to the equipped of both direction; At bolt body axle center preparation circular hole cavity, whole bolt weight saving, and then reduced the weight that relevant institute is equipped with object effectively; At bolt body axle center preparation circular hole cavity, under the situation that overall construction intensity remains unchanged, improve the rigidity of bolt part effectively, strengthened the crimped section internal stress of bolt part; At bolt body axle center preparation circular hole cavity, in weight saving, also realized the saving of whole resource; At bolt body axle center preparation circular hole cavity, solved the relatively poor problem of axle center heat treatment permeability, improved the thermal effectiveness of the body of bolt.
Description of drawings
Fig. 1 is the utility model embodiment's a structure three-dimensional schematic representation.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
The utility model embodiment shown in Figure 1 has left-hand thread structure of hollow bolt, comprises bolt body, and bolt body has head section 11, king-rod portion 12 and rear 13; Head section 11 is shaped on the first threaded body 11a, and rear 13 is shaped on the second threaded body 13a; Wherein: bolt body is shaped at least one along the axle center be the interior die cavity 14 of circular hole through hollow cold upset forming and that connect; The effective length of the first threaded body 11a and the second threaded body 13a all equals the diameter value of bolt body at least; King-rod portion 12 is a circular shaft, and the first threaded body 11a and the second threaded body 13a have the opposite threads rotation direction.
The utility model has the advantage of: at bolt body axle center preparation circular hole cavity, whole bolt weight saving, and then Effectively reduced relevant by the weight of equipped object; At bolt body axle center preparation circular hole cavity, strong in overall structure In the situation that degree remains unchanged, effectively improve the rigidity of bolt part, strengthened the crimped section internal stress of bolt part; Bolt body axle center preparation circular hole cavity in weight saving, has also been realized the saving of whole resource; At bolt originally Axon heart preparation circular hole cavity has solved the relatively poor problem of axle center heat treatment permeability, has improved the heat treatment effect of the body of bolt Really; The opposite threads rotation direction can adapt to the equipped of both direction.
Claims (1)
1, have left-hand thread structure of hollow bolt, comprise bolt body, described bolt body has head section (11), king-rod portion (12) and rear (13); Described head section (11) is shaped on first threaded body (11a), and described rear (13) is shaped on second threaded body (13a); It is characterized in that: described bolt body is shaped at least one along the axle center be the interior die cavity (14) of circular hole through hollow cold upset forming and that connect; The effective length of first threaded body (11a) and second threaded body (13a) all equals the diameter value of described bolt body at least; Described king-rod portion (12) is a circular shaft, and described first threaded body (11a) and second threaded body (13a) have the opposite threads rotation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201620393U CN201232693Y (en) | 2008-07-31 | 2008-07-31 | Hollow bolt with left hand thread structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201620393U CN201232693Y (en) | 2008-07-31 | 2008-07-31 | Hollow bolt with left hand thread structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201232693Y true CN201232693Y (en) | 2009-05-06 |
Family
ID=40619072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201620393U Expired - Fee Related CN201232693Y (en) | 2008-07-31 | 2008-07-31 | Hollow bolt with left hand thread structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201232693Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508383A (en) * | 2016-01-07 | 2016-04-20 | 太仓市德浩紧固件有限公司 | Slender waist bolt |
| CN106050871A (en) * | 2016-08-15 | 2016-10-26 | 钦州学院 | Flexible bolt with straight threaded end head |
| CN106122221A (en) * | 2016-08-15 | 2016-11-16 | 钦州学院 | A kind of flexible bolt with hexagon threaded end |
-
2008
- 2008-07-31 CN CNU2008201620393U patent/CN201232693Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508383A (en) * | 2016-01-07 | 2016-04-20 | 太仓市德浩紧固件有限公司 | Slender waist bolt |
| CN106050871A (en) * | 2016-08-15 | 2016-10-26 | 钦州学院 | Flexible bolt with straight threaded end head |
| CN106122221A (en) * | 2016-08-15 | 2016-11-16 | 钦州学院 | A kind of flexible bolt with hexagon threaded end |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103429913B (en) | Dowel with expanding sleeve | |
| CN201232694Y (en) | Combination hollow screw | |
| CN101328925A (en) | Hollow bolt with double nuts structure | |
| CN201232693Y (en) | Hollow bolt with left hand thread structure | |
| CN104963927A (en) | Flanging and riveting self-locking nut and machining method thereof | |
| CN201221533Y (en) | Double-thread head square hollow bolt | |
| CN201232690Y (en) | Double cut-surface hollow bolt with double nut structure | |
| CN201221528Y (en) | Ball head square neck structure hollow bolt | |
| CN106523504A (en) | Inner support anti-rotation anti-disengagement thread sleeve special for aluminum profile and installation method of inner support anti-rotation anti-disengagement thread sleeve | |
| CN201232692Y (en) | Six-cut-surface hollow bolt with double nut structure | |
| CN201232691Y (en) | Main and auxiliary cut-surface hollow bolt with double nut structure | |
| CN101328924B (en) | Inner hexagon hollow screw | |
| CN201221529Y (en) | Square head-shaped local screw thread hollow bolt | |
| CN201221532Y (en) | Hexagon head hollow bolt with pad structure | |
| CN204716710U (en) | One turns over riveting self-locking nut | |
| CN101363469A (en) | Hollow bolt with pad | |
| CN101328923A (en) | Double-thread head hollow bolt | |
| CN201225357Y (en) | Square head-shaped full thread hollow bolt | |
| CN201221536Y (en) | Inner hexagon hollow screw | |
| CN201221535Y (en) | Sinker anti-loose hollow screw | |
| CN201221534Y (en) | Double-thread head hexagon hollow bolt | |
| CN201221537Y (en) | External hexagon local screw thread hollow screw | |
| CN201221538Y (en) | External hexagon complete thread hollow screw | |
| CN201386718Y (en) | Novel expansion screw | |
| CN201221527Y (en) | Complete screw thread hollow bolt for T-shaped slot |
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: 20090506 Termination date: 20110731 |