CN203641224U - Positioning stud - Google Patents
Positioning stud Download PDFInfo
- Publication number
- CN203641224U CN203641224U CN201320725079.5U CN201320725079U CN203641224U CN 203641224 U CN203641224 U CN 203641224U CN 201320725079 U CN201320725079 U CN 201320725079U CN 203641224 U CN203641224 U CN 203641224U
- Authority
- CN
- China
- Prior art keywords
- screw rod
- round boss
- left screw
- stud
- right 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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Abstract
The utility model discloses a positioning stud which is provided with a cylinder. The positioning stud is characterized in that the cylinder comprises a left screw rod (2), a circular boss (3) and a right screw rod (5), wherein the circular boss (3) is positioned between the left screw rod (2) and the right screw rod (5); the axial leads of the left screw rod (2), the circular boss (3) and the right screw rod (5) are on one straight line; polygonal interior angle grooves (1) are formed in one end surface of the left screw rod (2); a relief groove (4) is formed between the circular boss (3) and the right screw rod (5). The positioning stud can improve the mounting precision, ensures the accurate positioning on a sealing gasket and a through hole part, has a simple structure, is convenient to dismount and mount, and is wide in application.
Description
Technical field
The utility model relates to mechanical parts technical field, particularly a kind of location stud.
Background technique
The pressurized container that people use now, the junction of the equipment such as fluid machinery and pipeline all needs sealing, and junction conventionally adopts pad to add cover plate or flange seals.Install in order to be convenient in the situation that improving machining accuracy, the through-hole diameter of pad and cover plate is often than fastening their screw or the large 2mm of diameter of bolt left and right, cause like this pad and cover plate or flange to have the concentricity that has maximum 4mm in any one direction of plane, conventionally to rely on skilled installation technical ability that concentricity is decreased to 2mm left and right by assembler, but the size of working as cover plate or flange is larger, when the quantity of screw or bolt is more, the difficulty that workman adjusts is also larger, the error of concentricity is difficult to control, and has reduced the installation precision at sealing position.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of location stud that can effectively improve installation precision.
The technical solution of the utility model is as follows: a kind of location stud, there is cylinder, described cylinder is made up of left screw rod (2), round boss (3) and right screw rod (5), round boss (3) is positioned between left screw rod (2) and right screw rod (5), three's shaft axis point-blank, be provided with polygonal interior angle groove (1) at the end face of described left screw rod (2), between described round boss (3) and right screw rod (5), have tool withdrawal groove (4).
Adopt above technological scheme, on right screw rod, there is tool withdrawal groove to be convenient to the step surface of round boss and the close contact of tapped hole part end face, very thin gasket seal also can be located accurately, and the concentricity while having reduced each part installation, has improved the installation precision at sealing position.Polygon interior angle groove on left screw rod end face, also makes double-screw bolt in the time of unidirectional screw rod fit sealing, be easy to mounting or dismounting.
As preferably, the large footpath of described left screw rod (2) equates with the large footpath of right screw rod (5), and this large footpath is less than the diameter of round boss (3).The diameter of round boss is greater than the large footpath of left screw rod and right screw rod, while putting into mounting hole, the cylindrical of round boss can play the locking and positioning function of cylindrical positioning pins, improves the concentricity precision of mounting parts, can guarantee that it locates accurately to gasket seal and through-hole parts.
As preferably, between described round boss (3) and left screw rod (2), pass through circular cone chamfered transition.This structure is convenient to gasket seal and through-hole parts is inserted in round boss, avoids boss corner angle to scratch seal ring, has improved the sealing of equipment sealing station.
As preferably, described interior angle groove (1) is regular hexagon.In the time carrying out unidirectional screw rod fit sealing, this regular hexagon structure is convenient to utilize conventional inner hexagon spanner mounting or dismounting positioning bidirectional double-screw bolt, both the screw rod that can avoid non-working surface manual when fastening silk thread mouth scratch hand, also can avoid with other instrument auxiliary operations time, damage screw thread, cause part waste.
As preferably, described left screw rod (2), round boss (3) and right screw rod (5) are structure as a whole.The shaft axis that this structure makes described three parts, has guaranteed that the concentricity of the localization part of round boss diameter and the fastening part of left and right both sides screw rod is consistent point-blank, has effectively improved the installation precision of equipment sealing station.
Beneficial effect: the utility model can improve installation precision, guarantees gasket seal and through-hole parts to locate accurately, and simple in structure, mounting or dismounting convenience, of many uses.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model left view.
Fig. 3 is the utility model assembling schematic diagram.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, a kind of location stud, have cylinder, described cylinder is made up of left screw rod 2, round boss 3 and right screw rod 5, and round boss 3 is between left screw rod 2 and right screw rod 5, three's shaft axis point-blank, be provided with polygonal interior angle groove 1 at the end face of described left screw rod 2, as preferably, take conventional at present tightening assistant tool as reference, this interior angle groove 1 is chosen to be hexagonal structure, the mounting or dismounting of convenient location stud.Between described round boss 3 and right screw rod 5, there is tool withdrawal groove 4, be convenient to the step surface of round boss 3 and the close contact of tapped hole part end face, very thin gasket seal also can be located accurately, improve the installation precision of each part concentricity.Left screw rod 2 has circular cone inclined-plane with round boss 3 joints, is convenient to gasket seal and through-hole parts and is inserted in round boss 3, has strengthened the sealing of equipment sealing station.
Working principle of the present utility model is:
As shown in Figures 2 and 3, two location stud are first installed in the mounting hole on the left and right both sides of equipment, together with gasket seal 6 is connected in series to the mating face of pressurized container 8 three with flange 7, expose the left screw rod 2 with hexagonal indentations outside equipment with inner hexagon spanner turn, give fastening to right screw rod 5, again seal ring and pad are inserted in to left screw rod 2, screw in left screw rod 2 with locking nut, sealing station is carried out to secondary fit sealing, and then the bolt that all the other specifications are installed carries out lock sealing.So not only can improve mating face, the upper end three's of gasket seal 6 and flange 7 and pressurized container 8 installation precision, and accurate positioning.The bolt of all the other specifications with the same normal mounting at ordinary times.
Can find out by example, the matching gap in location round boss 3 diameters of stud and the aperture of gasket and flange screw is less, and the concentricity of installation is higher; But too small matching gap can make three's machining accuracy uprise, excessive matching gap can lose again the effect of the raising installation concentricity precision of round boss 3 on positioning bidirectional bolt.Do not changing under the prerequisite of using effect, according to the concrete condition using, conventionally the matching gap of the diameter of its round boss 3 and pilot hole is being controlled in 0.2-1mm.As being equal to replacement condition, polygon interior angle groove 1 under same texts, the interior four-corner structure that also can be set to commonly use; Under effects equivalent, the screw thread specification of left screw rod 2 and right screw rod 5 can be adjusted according to the concrete condition using.
Claims (5)
1. a location stud, there is cylinder, it is characterized in that: described cylinder is made up of left screw rod (2), round boss (3) and right screw rod (5), round boss (3) is positioned between left screw rod (2) and right screw rod (5), three's shaft axis point-blank, be provided with polygonal interior angle groove (1) at the end face of described left screw rod (2), between described round boss (3) and right screw rod (5), have tool withdrawal groove (4).
2. locate according to claim 1 stud, it is characterized in that: the large footpath of described left screw rod (2) equates with the large footpath of right screw rod (5), this large footpath is less than the diameter of round boss (3).
3. locate stud according to described in claim 1 or 2, it is characterized in that: between described round boss (3) and left screw rod (2), pass through circular cone chamfered transition.
4. locate according to claim 1 stud, it is characterized in that: described interior angle groove (1) is regular hexagon.
5. locate according to claim 1 stud, it is characterized in that: described left screw rod (2), round boss (3) and right screw rod (5) are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725079.5U CN203641224U (en) | 2013-11-14 | 2013-11-14 | Positioning stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725079.5U CN203641224U (en) | 2013-11-14 | 2013-11-14 | Positioning stud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203641224U true CN203641224U (en) | 2014-06-11 |
Family
ID=50872472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320725079.5U Expired - Fee Related CN203641224U (en) | 2013-11-14 | 2013-11-14 | Positioning stud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203641224U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555772A (en) * | 2018-12-11 | 2019-04-02 | 贵州航天精工制造有限公司 | A kind of locking studs modular construction with stop platform |
| CN112555391A (en) * | 2020-11-05 | 2021-03-26 | 陕西法士特汽车传动集团有限责任公司 | Easily-detachable power takeoff and transmission combination |
| CN112589146A (en) * | 2020-12-02 | 2021-04-02 | 四川航天长征装备制造有限公司 | Soft claw assembly with replaceable soft claw seat |
-
2013
- 2013-11-14 CN CN201320725079.5U patent/CN203641224U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555772A (en) * | 2018-12-11 | 2019-04-02 | 贵州航天精工制造有限公司 | A kind of locking studs modular construction with stop platform |
| CN112555391A (en) * | 2020-11-05 | 2021-03-26 | 陕西法士特汽车传动集团有限责任公司 | Easily-detachable power takeoff and transmission combination |
| CN112555391B (en) * | 2020-11-05 | 2022-04-15 | 陕西法士特汽车传动集团有限责任公司 | Easily-detachable power takeoff and transmission combination |
| CN112589146A (en) * | 2020-12-02 | 2021-04-02 | 四川航天长征装备制造有限公司 | Soft claw assembly with replaceable soft claw seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20161114 |