CN204611135U - A kind of pipe joint self-locking structure - Google Patents
A kind of pipe joint self-locking structure Download PDFInfo
- Publication number
- CN204611135U CN204611135U CN201520295955.4U CN201520295955U CN204611135U CN 204611135 U CN204611135 U CN 204611135U CN 201520295955 U CN201520295955 U CN 201520295955U CN 204611135 U CN204611135 U CN 204611135U
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- Prior art keywords
- ring surface
- pipe joint
- cap nut
- interior side
- locking
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The utility model relates to pipeline connection device designing technique, particularly relates to a kind of pipe joint self-locking structure, can not meet the problem of motor to assembling and maintainability requirement to solve existing pipe joint locking disconnecting prevention structure.In pipe joint self-locking structure of the present utility model, the annular boss of cap nut comprises interior side ring surface, inner ring surface and outside anchor ring, wherein, interior side ring surface and outside anchor ring not parallel, and interior side ring surface and inner ring surface joint are provided with chamfering, in the process that cap nut is tightened gradually, the point of contact of interior side ring surface and pipe joint due to area of contact little, larger strain can be formed, the frictional force produced can overcome the trend that gets loose of screw thread between cap nut and pipe joint under comparatively complicated vibration environment, thus realizes the object of self-locking.
Description
Technical field
The utility model relates to pipeline connection device designing technique, particularly relates to a kind of pipe joint self-locking structure.
Background technique
The function of engine pipelines is conveying fuel oil, lubricating oil, air and engine condition control information, is the important composition parts of motor.Engine pipelines is laid in the limited space of external engine more, need meet to connect sealing and wait requirement, and the work that simultaneously can be satisfied with in the operating mode of broad complexity in order to ensure motor, need consider the reliable lock of line connection.
As shown in Figure 1, in conventional pipe joint structure, preventing pipe joint 1 from occurring getting loose by arranging lock silk, tightening after assembling completes, by locking wire lock tightly on the corresponding part in pipe joint 1 two ends in design lock silk hole.When the internal thread of cap nut 2 is screwed on the outside thread of pipe joint 1, pipe joint 1 and cap nut 2 are fitted in the A plane perpendicular to pipeline axis.Although A plane theory is face laminating, due to processing and the impact of build-up tolerance, actual using process midplane A fit might not closely with continuous.And obvious strain cannot be produced due to A plane, the frictional force therefore produced in A plane is not enough to stop getting loose of screw thread under the vibration environment of complexity.
In addition, this kind of locking disconnecting prevention structure all has higher requirement to lock silk assembly direction, lock silk assembling elasticity etc., and tension easily ruptures in engine working process, crosses pine and can not play corresponding effect; Meanwhile, lock silk needs special instrument to carry out assembling Sum decomposition, and dismounting is wasted time and energy, and can not meet the requirement of motor to assembling and maintainability.
Summary of the invention
The purpose of this utility model is to provide a kind of pipe joint self-locking structure, can not meet the problem of motor to assembling and maintainability requirement to solve existing pipe joint locking disconnecting prevention structure.
The technical solution of the utility model is:
A kind of pipe joint self-locking structure, for by cap nut by pipe joint and pipe interface place, the inwall of described cap nut is provided with a coaxial annular boss, described annular boss is positioned at one end away from described pipe interface of described cap nut, and described annular boss is made up of interior side ring surface, inner ring surface and outside anchor ring;
Described interior side ring surface and described cap nut radial plane are an angle, and the maximum diameter place of described interior side ring surface is less than the distance of minimum diameter place apart from described pipe interface end face of described interior side ring surface apart from the distance of described pipe interface end face, described interior side ring surface and described inner ring surface joint are provided with chamfering.
Alternatively, the inner ring surface of described annular boss has same internal diameter.
Alternatively, the outside anchor ring of described annular boss is parallel with the radial plane of described pipe joint.
Alternatively, described pipe joint outer ring surface has contact and coaxial locking anchor ring with side ring surface in described annular boss;
In addition, with parallel and after described locking anchor ring being intercepted through the cross section of described cap nut axis, and along seeing perpendicular to described cross-wise direction, described locking anchor ring is divided into two arcs being symmetry axis with described cap nut axis, and the opening of described arc described cap nut axis dorsad.
The utility model has the advantage of: in pipe joint self-locking structure of the present utility model, the annular boss of cap nut comprises interior side ring surface, inner ring surface and outside anchor ring, wherein, interior side ring surface and outside anchor ring not parallel, and interior side ring surface and inner ring surface joint are provided with chamfering, in the process that cap nut is tightened gradually, the point of contact of interior side ring surface and pipe joint due to area of contact little, larger strain can be formed, the frictional force produced can overcome the trend that gets loose of screw thread between cap nut and pipe joint under comparatively complicated vibration environment, thus realize the object of self-locking.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing pipe joint self-locking structure;
Fig. 2 is the structural representation of the utility model pipe joint self-locking structure;
Fig. 3 is the enlarged diagram of I part in Fig. 2;
Fig. 4 is also the enlarged diagram of I part in Fig. 2.
Embodiment
Be described in detail of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 4, pipe joint self-locking structure of the present utility model, for passing through cap nut 2 by pipe joint 1 and pipe interface place, pipe joint 1 can also connect corresponding pipeline.
The inwall of cap nut 2 is provided with a coaxial annular boss 3, annular boss 3 is positioned at one end away from pipe interface of cap nut 2, cap nut 2 is extruded pipe joint 1 by annular boss 3, reach the object of locking pipe joint 1, structural principle coordinates with of the prior art substantially similar, repeats no more.
Annular boss 3 is made up of interior side ring surface 31, inner ring surface 32 and outside anchor ring 33.In pipe joint self-locking structure of the present utility model, especially as shown in Figure 3 and Figure 4, interior side ring surface 31 is an angle with cap nut 2 radial plane, and the distance of the maximum diameter place of interior side ring surface 31 distance pipe interface end face is less than the distance of minimum diameter place apart from pipe interface end face of interior side ring surface 31, interior side ring surface 31 is provided with chamfering with inner ring surface 32 joint, and the radius r of chamfering can carry out the selection be applicable to as required.
The inner ring surface 32 of annular boss 3 has same internal diameter, and outside anchor ring 33 is parallel with the radial plane of pipe joint 1.
In addition, pipe joint 1 outer ring surface can also have contact and coaxial locking anchor ring 12 with side ring surface 31 in described annular boss 3.With parallel and after described locking anchor ring 12 being intercepted through the cross section of described cap nut 2 axis, and along seeing perpendicular to described cross-wise direction, locking anchor ring 12 is divided into the arc (only illustrating the arc being positioned at top in Fig. 3 and Fig. 4) that two is symmetry axis with cap nut 2 axis, and the opening of arc cap nut 2 axis dorsad, the radius R of arc can according to the selection carrying out being applicable to, further, in the present embodiment, above-mentioned radius r is less than radius R herein.
In pipe joint self-locking structure of the present utility model, interior side ring surface 31 and inner ring surface 32 joint of annular boss 3 are provided with chamfering, in the process that cap nut 2 is tightened gradually, the point of contact of interior side ring surface 31 and pipe joint 1 due to area of contact little, larger strain can be formed, the frictional force produced can overcome the trend that gets loose of screw thread between cap nut 2 and pipe joint 1 under comparatively complicated vibration environment, thus realizes the object of self-locking.Therefore, pipe joint self-locking structure of the present utility model have structure simple, install and remove convenient advantage, eliminate the tight mode of traditional locking wire lock, save the troublesome operation of dismounting lock silk, simplify the structure, the self-locking of high efficient and reliable can be provided to connect for pipeline connects, assembling and the maintainability of pipeline can be significantly improved.
Further, the back segment (locking anchor ring 12) of pipe joint 1 is one section of circular arc R, cap nut 2 back segment one section of minor radius r arc section (interior side ring surface 31).In pipe joint 1 assembly process, the small arc-shaped r section of cap nut 2 contacts with the orthodrome R section of pipe joint 1.In the process that cap nut 2 is tightened gradually, the point of contact of roundlet segmental arc r and orthodrome R can gradually on move.The special uneven rigid design of cap nut 2 afterbody can make afterbody move past in journey on the contact point and produce small elastic deformation, simultaneously because contact point area is less, can form larger strain at point of contact place.The frictional force that this strain produces can overcome the trend that gets loose of screw thread between cap nut 2 and pipe joint 1 under comparatively complicated vibration environment, thus realizes the object of self-locking.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.
Claims (4)
1. a pipe joint self-locking structure, for passing through cap nut (2) by pipe joint (1) and pipe interface place, it is characterized in that, the inwall of described cap nut (2) is provided with a coaxial annular boss (3), described annular boss (3) is positioned at one end away from described pipe interface of described cap nut (2), and described annular boss (3) is made up of interior side ring surface (31), inner ring surface (32) and outside anchor ring (33);
Described interior side ring surface (31) and described cap nut (2) radial plane are an angle, and the maximum diameter place of described interior side ring surface (31) is less than the distance of minimum diameter place apart from described pipe interface end face of described interior side ring surface (31) apart from the distance of described pipe interface end face, described interior side ring surface (31) and described inner ring surface (32) joint are provided with chamfering.
2. self-locking structure according to claim 1, is characterized in that: the inner ring surface (32) of described annular boss (3) has same internal diameter.
3. self-locking structure according to claim 2, is characterized in that: the outside anchor ring (33) of described annular boss (3) is parallel with the radial plane of described pipe joint (1).
4. self-locking structure according to claim 1, is characterized in that: described pipe joint (1) outer ring surface has and contacts and coaxial locking anchor ring (12) with the interior side ring surface (31) of described annular boss (3);
In addition, with parallel and after described locking anchor ring (12) being intercepted through the cross section of described cap nut (2) axis, and along seeing perpendicular to described cross-wise direction, it is the arc of symmetry axis that described locking anchor ring (12) is divided into two with described cap nut (2) axis, and the opening of described arc described cap nut (2) axis dorsad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295955.4U CN204611135U (en) | 2015-05-07 | 2015-05-07 | A kind of pipe joint self-locking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295955.4U CN204611135U (en) | 2015-05-07 | 2015-05-07 | A kind of pipe joint self-locking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204611135U true CN204611135U (en) | 2015-09-02 |
Family
ID=53963701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520295955.4U Active CN204611135U (en) | 2015-05-07 | 2015-05-07 | A kind of pipe joint self-locking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204611135U (en) |
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2015
- 2015-05-07 CN CN201520295955.4U patent/CN204611135U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |