CN111894961A - Screw thread reinforcing bush - Google Patents
Screw thread reinforcing bush Download PDFInfo
- Publication number
- CN111894961A CN111894961A CN201910367966.1A CN201910367966A CN111894961A CN 111894961 A CN111894961 A CN 111894961A CN 201910367966 A CN201910367966 A CN 201910367966A CN 111894961 A CN111894961 A CN 111894961A
- Authority
- CN
- China
- Prior art keywords
- thread
- annular
- bolt head
- screw rod
- groove
- 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.)
- Withdrawn
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 241000981770 Buddleja asiatica Species 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 229910001234 light alloy Inorganic materials 0.000 description 4
- 239000010953 base metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
- F16B37/122—Threaded inserts, e.g. "rampa bolts"
- F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
Abstract
The invention provides a thread reinforcing bushing which comprises a bolt head and a screw rod which are integrated and coaxially arranged up and down, wherein an annular concave neck part is arranged at the joint of the bolt head and the screw rod and is used as transition connection; the screw rod extends along the axial direction and is divided into a thread section and a dog tail from top to bottom, and the thread section is provided with external threads on the outer side surface of the screw rod; an annular through groove is formed in the threaded section, internal threads are formed in the inner side face of the annular through groove, the annular through groove is communicated with the bolt head, and the dog tail is in an inverted round platform shape and is in transition connection with the threaded section and the dog tail. According to the invention, the concave neck is arranged below the bolt head and is matched with the internal and external thread structures, so that the effects of thread reinforcement and looseness prevention are simultaneously achieved after assembly.
Description
Technical Field
The invention mainly relates to the field of sealing threads, in particular to a thread reinforcing bushing.
Background
With the rapid development of economy and technology, the requirement for light weight is higher and higher, and more light alloys such as aluminum alloy, magnesium alloy and the like are beginning to be widely applied to the automobile industry, high-speed rail and the like. However, in the prior art, closed internal threads are mostly directly processed on the light alloy, but the internal threads are often damaged due to the low tensile strength of the light alloy. Since the length of the screw thread must be increased in order to secure the strength of the screw connection, the light alloy must have a sufficient thickness, which is contrary to the light weight.
Disclosure of Invention
The invention provides a thread reinforcing bushing, aiming at the defects in the prior art, the thread reinforcing bushing comprises a bolt head 1 and a screw rod 2 which are integrated and coaxially arranged up and down, wherein an annular concave neck 3 is arranged at the joint of the bolt head 1 and the screw rod 2 and is used as transition connection;
the screw rod 2 extends along the axial direction and is divided into a thread section 21 and a dog tail 22 from top to bottom, and the thread section 21 is provided with an external thread 4 on the outer side surface of the screw rod 2;
an annular through groove 5 is formed in the threaded section 21, internal threads 6 are formed in the inner side face of the annular through groove 5, and the annular through groove 5 is communicated with the bolt head 1; the dog tail 22 is in an inverted round platform shape and is in transition connection with the thread section 21 and the dog tail 22.
Preferably, the vertical both sides of dog tail 22 are the setting of obliquely entry chamfer 7 form, the contained angle of entry chamfer 7 and the ascending extension line in the vertical direction of screw thread section 21 is 30.
Preferably, the outer side surface of the bolt head 1 is provided with a vertical knurling structure, and the outer diameter of the vertical knurling structure is larger than the inner diameter of a counter bore 9 in a base material 8 of the lock.
Preferably, the nominal diameter of the external thread 4 is much greater than the nominal diameter of the internal thread 6.
Preferably, there is a deformable region between the annular recessed neck 3 and the annular through slot 5.
Preferably, the bolt head 1, the neck 3 and the screw 2 are made of steel or stainless steel.
The invention has the beneficial effects that: the concave neck is arranged under the bolt head and matched with the internal and external thread structures, so that the effects of thread reinforcement and sealing are simultaneously achieved after assembly.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
FIG. 2 is a schematic view of the shape of the opening of the base material of the lock according to the present invention;
FIG. 3 is a perspective view of the present invention;
FIG. 4 is a state diagram of the present invention in use;
in the figure, the position of the upper end of the main shaft,
1. a bolt head; 2. screw, 21, thread section, 22, dog tail; 3. a neck portion; 4. an external thread; 5. an annular through groove; 6. an internal thread; 7. an inlet chamfer angle; 8. a base material; 9. a counterbore.
Detailed Description
As shown in fig. 1 to 4, the present invention includes: the bolt head 1 and the screw rod 2 are arranged coaxially and up and down, and an annular concave neck 3 is arranged at the joint of the bolt head 1 and the screw rod 2 and is used as transition connection;
the screw rod 2 extends along the axial direction and is divided into a thread section 21 and a dog tail 22 from top to bottom, and the thread section 21 is provided with an external thread 4 on the outer side surface of the screw rod 2;
an annular through groove 5 is formed in the threaded section 21, internal threads 6 are formed in the inner side face of the annular through groove 5, and the annular through groove 5 is communicated with the bolt head 1;
the dog tail 22 is in an inverted round platform shape and is in transition connection with the thread section 21 and the dog tail 22.
In this embodiment, it is preferable that the vertical two sides of the dog tail 22 are provided with oblique inlet chamfers 7, and an included angle between the inlet chamfers 7 and an extension line of the thread section 21 in the vertical direction is 30 °.
By means of the structure, the included angle of 30 degrees is beneficial to guiding when the thread reinforcing bushing is installed, and the sealing thread reinforcing bushing can be smoothly screwed into the internal thread on the base metal of the counter lock.
In this embodiment, it is preferable that the outer side surface of the bolt head 1 is provided with a vertical knurling structure, and the outer diameter of the vertical knurling structure is larger than the inner diameter of the counter bore 9 on the base material 8 of the counter lock.
The structure ensures that the head of the sealing thread reinforcing bushing is pressed into the parent metal of the counter lock in an interference manner, thereby ensuring that the sealing thread reinforcing bushing cannot rotate on the parent metal and playing a role in preventing looseness.
In this embodiment, the hollow bolt head 1 is preferably flush with the surface of the base material 8 after being pressed into the base material 8 of the lock.
In the present embodiment, the nominal diameter of the external thread 4 is preferably much greater than the nominal diameter of the internal thread 6.
By adopting the structure, on one hand, the force born by the internal thread 6 can be transmitted to the external thread 4 with a larger stress surface and the internal thread matched with the internal thread of the counter lock base metal, so that the thread reinforcing effect is realized, and 8.8-grade, 10.9-grade and even 12.9-grade counter lock bolts can be matched;
on the other hand, the lower parent metal to the lock of tensile strength has still been protected when playing the screw thread increase effect, and the internal thread is impaired risk on the parent metal to the lock of greatly reduced benefits from the screw thread reinforcing effect, and the parent metal to the lock can become thinner, can open the through-hole moreover to play light-weighted effect, manufacturing cost obtains practicing thrift.
In the present embodiment, it is preferred that there is a deformable region between the annular recessed neck 3 and the annular through slot 5.
With the above structure, when the hollow bolt head 1 is subjected to a sufficient pressure, the neck portion 3 of the annular recess is deformed to bulge, shortening the total length of the thread reinforcing bush, so that the hollow bolt head 1 can be pressed into the base material of the counter lock.
In the present embodiment, the bolt head 1, the neck 3, and the screw 2 are preferably made of steel or stainless steel.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (6)
1. The thread reinforcing bushing is characterized by comprising a bolt head (1) and a screw rod (2) which are integrated and coaxially arranged up and down, wherein an annular concave neck (3) is arranged at the joint of the bolt head (1) and the screw rod (2) and is used as transition connection;
the screw rod (2) extends along the axial direction and is divided into a thread section (21) and a dog tail (22) from top to bottom, and the thread section (21) is provided with an external thread (4) on the outer side surface of the screw rod (2);
an annular through groove (5) is formed in the threaded section (21), internal threads (6) are formed in the inner side face of the annular through groove (5), and the annular through groove (5) is communicated with the bolt head (1);
the dog tail (22) is in an inverted round platform shape and is in transition connection with the thread section (21) and the dog tail (22).
2. The thread reinforcing bushing of claim 1, wherein: dog tail (22) vertical both sides are the setting of obliquely entry chamfer (7) form, entry chamfer (7) are 30 with the contained angle of the ascending extension line in screw thread section (21) vertical direction.
3. The thread reinforcing bushing of claim 2, wherein: the outer side surface of the bolt head (1) is provided with a vertical knurling structure, and the outer diameter of the vertical knurling structure is larger than the inner diameter of a counter bore (9) in a base material (8) of the lock.
4. The thread reinforcing bushing of claim 3, wherein: the nominal diameter of the external thread (4) is far larger than that of the internal thread (6).
5. The thread reinforcing bushing of claim 4, wherein: a deformable area is arranged between the annular concave neck (3) and the annular through groove (5).
6. The thread reinforcing bushing of claim 5, wherein: the bolt head (1), the neck (3) and the screw rod (2) are made of steel or stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367966.1A CN111894961A (en) | 2019-05-05 | 2019-05-05 | Screw thread reinforcing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367966.1A CN111894961A (en) | 2019-05-05 | 2019-05-05 | Screw thread reinforcing bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111894961A true CN111894961A (en) | 2020-11-06 |
Family
ID=73169151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910367966.1A Withdrawn CN111894961A (en) | 2019-05-05 | 2019-05-05 | Screw thread reinforcing bush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111894961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218244A (en) * | 2021-05-11 | 2021-08-06 | 北京空天技术研究所 | Windproof locking mechanism |
-
2019
- 2019-05-05 CN CN201910367966.1A patent/CN111894961A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218244A (en) * | 2021-05-11 | 2021-08-06 | 北京空天技术研究所 | Windproof locking mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201106 |