CN109538599B - High positioning accuracy anti-drop's cabin section location pinhole structure - Google Patents
High positioning accuracy anti-drop's cabin section location pinhole structure Download PDFInfo
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- CN109538599B CN109538599B CN201811556403.9A CN201811556403A CN109538599B CN 109538599 B CN109538599 B CN 109538599B CN 201811556403 A CN201811556403 A CN 201811556403A CN 109538599 B CN109538599 B CN 109538599B
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- 230000004323 axial length Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 abstract description 16
- 230000007547 defect Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 2
- 108010066114 cabin-2 Proteins 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Insertion Pins And Rivets (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A high-positioning-precision anti-drop cabin positioning pin hole structure relates to the field of cabin butt joint and butt joint of an aircraft and an engine; comprises a positioning pin, a front cabin body and a rear cabin body; the positioning pin comprises a guide section, a front cabin body positioning section, a rear cabin body positioning section and a fixing section; the guide section, the front cabin body positioning section, the rear cabin body positioning section and the fixing section are sequentially connected along the axial direction; the guide section, the front cabin body positioning section, the rear cabin body positioning section and the fixing section are of an integrated structure; during assembly, the rear cabin body is sleeved on the outer walls of the positioning section and the fixing section of the rear cabin body from the fixing section end of the positioning pin along the axial direction; the front cabin body is sleeved on the outer wall of the positioning section of the front cabin body from the guiding section end of the positioning pin along the axial direction; the rear cabin body is sleeved on the outer walls of the positioning section and the fixing section of the rear cabin body; the invention solves the problem of low precision of the positioning pin installed by threads and solves the problem that the unthreaded hole positioning pin is easy to fall off when the cabin section is in butt joint with the engine for multiple times.
Description
Technical Field
The invention relates to the field of butt joint of cabin sections and butt joint of an aircraft and an engine, in particular to a high-positioning-precision anti-drop cabin section positioning pin hole structure.
Background
A certain verification platform is a secondary rocket verification bomb with a large slenderness ratio, and aiming precision is guaranteed by mechanical transmission precision according to the overall scheme. The traditional locating pin has two structural forms: one end of the first positioning pin is provided with an external thread, and the other end of the first positioning pin is provided with a high-precision optical pin; the full length of the second locating pin is designed into a high-precision smooth pin. The first positioning pin is arranged on the cabin body at one end through an external thread and is matched with the positioning unthreaded hole of the cabin body at the other end through a high-precision unthreaded pin to perform butt joint positioning on cabin sections; one end of a second positioning pin is directly inserted into the positioning unthreaded hole of the front-end cabin body, and the other end of the second positioning pin is matched with the positioning unthreaded hole of the rear-end cabin body to carry out butt joint positioning of the two cabin sections. The first positioning pin/hole structure design has the defect that the precision of threaded connection is poor, so that the butt joint precision of the cabin section is affected, and the second positioning pin/hole structure design has the defect that the positioning pin can fall off from the cabin body or an engine in the operation process due to the fact that the engine is heavy in weight in the butt joint process of the cabin body and the engine.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a high-positioning-precision anti-falling cabin section positioning pin hole structure, solves the problem of low precision of a positioning pin installed by threads, and solves the problem that a unthreaded hole positioning pin is easy to fall off when a cabin section is in butt joint with an engine for multiple times.
The above purpose of the invention is realized by the following technical scheme:
a high-positioning-precision anti-drop cabin positioning pin hole structure comprises a positioning pin, a front cabin body and a rear cabin body; the positioning pin comprises a guide section, a front cabin body positioning section, a rear cabin body positioning section and a fixing section; the guide section, the front cabin body positioning section, the rear cabin body positioning section and the fixing section are sequentially connected along the axial direction; the guide section, the front cabin body positioning section, the rear cabin body positioning section and the fixing section are of an integrated structure; during assembly, the front cabin body is sleeved on the outer wall of the positioning section of the front cabin body; the rear cabin body is sleeved on the outer walls of the positioning section and the fixing section of the rear cabin body.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the guide section is of a conical cylinder structure; the large-diameter end of the guide section is coaxially butted with the front cabin body.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the diameter L1 of the small-diameter end of the guide section is 5-10 mm; the diameter L2 of the large-diameter end is 8-16 mm; the axial length of the guide section is greater than 2 mm.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the front cabin positioning section column body structure; the diameter of the positioning section of the front cabin body is 8-16 mm; the diameter error standard of the positioning section of the front cabin body is not more than h 7; the axial length L4 of the front cabin body positioning section is 10-30 mm.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the rear cabin positioning section is of a cylinder structure; the diameter of the positioning section of the rear cabin body is 8-16 mm; the diameter error standard of the positioning section of the rear cabin body is not more than h 7; the axial length L5 of the positioning section of the rear cabin body is 5-20 mm.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the fixing section is of a cylinder structure; the nominal diameter L3 of the fixed section is 4-12 mm; the axial length L6 is 15-25 mm; the circumferential outer wall of the fixed section is provided with threads.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the side wall of the front cabin body is provided with a cylindrical through hole; during assembly, the positioning section of the front cabin body extends into the cylindrical through hole.
In the high-positioning-precision anti-drop cabin positioning pin hole structure, the inner diameter L7 of the cylindrical through hole is 8-16 mm; the diameter error standard of the inner diameter of the cylindrical through hole is not more than H7.
In the high-positioning-precision anti-drop cabin section positioning pin hole structure, the rear cabin body is provided with a step through hole; the diameter L8 of the large-diameter section of the step through hole is 8-16 mm; the diameter error standard of the large-diameter section of the step through hole is not more than H7; the diameter L9 of the small-diameter section of the step through hole is 6-14 mm.
In the above high-positioning-precision anti-drop cabin-section positioning pin hole structure, the assembling process of the positioning pin, the front cabin body and the rear cabin body is as follows:
sleeving the rear cabin body on the outer walls of the positioning section and the fixing section of the rear cabin body from the fixing section end of the positioning pin along the axial direction; axial limiting is realized through the matching of the step through hole and the positioning section and the fixing section of the rear cabin body; sleeving the front cabin body on the outer wall of the positioning section of the front cabin body from the guide section end of the positioning pin along the axial direction; the end surfaces of the rear cabin body and the front cabin body are butted; and the outer wall of the fixing section is in threaded fit with the outer nut, so that axial limiting and fixing are realized.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, the cabin section is provided with the positioning step unthreaded hole, the positioning pin is arranged on the cabin body through matching with the nut, and the positioning precision of the butt joint of the cabin section is ensured through the precision of the unthreaded pin and the large hole in the step hole, so that the problem of low positioning precision of the traditional positioning pin directly screwed on the cabin body is solved;
(2) the invention solves the problem that the polished rod positioning pin is easy to fall off under the condition of avoiding the reduction of butt joint precision caused by the design of a threaded mounting hole on the cabin body.
Drawings
FIG. 1 is a schematic view of a locating pin according to the present invention;
FIG. 2 is a schematic view of the cylindrical through hole of the front body of the present invention;
FIG. 3 is a schematic view of the stepped through-holes of the rear deck of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
in order to solve the problem that aiming precision is guaranteed through mechanical transmission of multiple butt joint surfaces of a second-level rocket verification projectile and prevent the polished rod positioning pin from falling off easily during butt joint, the invention provides a high-positioning-precision anti-falling cabin positioning pin hole structure, which solves the problem that a positioning pin installed through threads is low in precision and solves the problem that the polished rod positioning pin is prone to falling off when the cabin is in butt joint with an engine for multiple times.
A high-positioning-precision anti-drop cabin positioning pin hole structure comprises a positioning pin 1, a front cabin body 2 and a rear cabin body 3; as shown in fig. 1, which is a schematic view of a positioning pin, it can be seen that the positioning pin 1 includes a guide section 11, a front cabin body positioning section 12, a rear cabin body positioning section 13 and a fixing section 14; the guide section 11, the front cabin body positioning section 12, the rear cabin body positioning section 13 and the fixing section 14 are sequentially connected along the axial direction; the guide section 11, the front cabin body positioning section 12, the rear cabin body positioning section 13 and the fixing section 14 are of an integrated structure; during assembly, the front cabin body 2 is sleeved on the outer wall of the front cabin body positioning section 12; the rear cabin 3 is sleeved on the outer walls of the positioning section 13 and the fixing section 14 of the rear cabin. Wherein, the guide section 11 is a conical cylinder structure; the large-diameter end of the guide section 11 is coaxially butted with the front cabin body 2. The diameter L1 of the small diameter end of the guide section 11 is 5-10 mm; the diameter L2 of the large-diameter end is 8-16 mm; the axial length of the guide section 11 is greater than 2 mm.
The front cabin body positioning section is of a 12-column structure; the diameter of the front cabin body positioning section 12 is 8-16 mm; the diameter error standard of the front cabin body positioning section 12 is not more than h 7; the axial length L4 of the front cabin body positioning section 12 is 10-30 mm. The positioning section 13 of the rear cabin body is of a column structure; the diameter of the rear cabin body positioning section 13 is 8-16 mm; the diameter error standard of the positioning section 13 of the rear cabin body is not more than h 7; the axial length L5 of the rear cabin body positioning section 13 is 5-20 mm. The fixed section 14 is of a cylindrical structure; the nominal diameter L3 of the fixed section 14 is 4-12 mm; the axial length L6 is 15-25 mm; the circumferential outer wall of the fixed section 14 is provided with a thread.
As shown in fig. 2, which is a schematic view of the cylindrical through hole of the front cabin, it can be seen that the side wall of the front cabin 2 is provided with a cylindrical through hole 21; during assembly, the front cabin positioning section 12 extends into the cylindrical through hole 21. The inner diameter L7 of the cylindrical through hole 21 is 8-16 mm; the diameter error standard of the inner diameter of the cylindrical through-hole 21 is not more than H7.
As shown in fig. 3, which is a schematic view of the step through hole of the rear cabin, it can be seen that the rear cabin 3 is provided with a step through hole 31; the diameter L8 of the large-diameter section of the step through hole 31 is 8-16 mm; the diameter error standard of the large-diameter section of the step through hole 31 is not more than H7; the diameter L9 of the small diameter section of the step through hole 31 is 6-14 mm. To ensure that the threads are not subjected to shear forces
The assembling process of the positioning pin 1, the front cabin body 2 and the rear cabin body 3 is as follows:
sleeving the rear cabin body 3 on the outer walls of the positioning section 13 and the fixing section 14 of the rear cabin body from the fixing section 14 end of the positioning pin 1 along the axial direction; axial limiting is realized through the matching of the step through hole 31 and the positioning section 13 and the fixing section 14 of the rear cabin body; and the screw thread of the fixed section 14 can extend out of the side wall of the rear cabin body 3 by 2-3 mm after assembly; sleeving the front cabin body 2 on the outer wall of the front cabin body positioning section 12 from the guide section 11 end of the positioning pin 1 along the axial direction; slowly approaching the rear cabin body 3 and the front cabin body 2 to finally realize the butt joint of the end surfaces of the rear cabin body 3 and the front cabin body 2; and the outer nut is in threaded fit with the outer wall of the fixed section 14 to realize axial limiting and fixing.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (1)
1. The utility model provides a high positioning accuracy anti-drop's cabin section location pinhole structure which characterized in that: comprises a positioning pin (1), a front cabin body (2) and a rear cabin body (3); the positioning pin (1) comprises a guide section (11), a front cabin body positioning section (12), a rear cabin body positioning section (13) and a fixing section (14); the guide section (11), the front cabin body positioning section (12), the rear cabin body positioning section (13) and the fixing section (14) are sequentially connected along the axial direction; the guide section (11), the front cabin body positioning section (12), the rear cabin body positioning section (13) and the fixing section (14) are of an integrated structure; during assembly, the front cabin body (2) is sleeved on the outer wall of the front cabin body positioning section (12); the rear cabin body (3) is sleeved on the outer walls of the positioning section (13) and the fixing section (14) of the rear cabin body; the outer nut is in threaded fit with the outer wall of the fixing section (14) to realize axial limiting and fixing;
the guide section (11) is of a conical cylinder structure; the large-diameter end of the guide section (11) is coaxially butted with the front cabin body (2);
the diameter L1 of the small-diameter end of the guide section (11) is 5-10 mm; the diameter L2 of the large-diameter end is 8-16 mm; the axial length of the guide section (11) is more than 2 mm;
the front cabin body positioning section (12) is of a cylinder structure; the diameter of the front cabin body positioning section (12) is 8-16 mm; the diameter error standard of the front cabin body positioning section (12) is not more than h 7; the axial length L4 of the front cabin body positioning section (12) is 10-30 mm;
the rear cabin body positioning section (13) is of a cylinder structure; the diameter of the rear cabin body positioning section (13) is the same as that of the front cabin body positioning section (12), and the diameters of the rear cabin body positioning section and the front cabin body positioning section are 8-16 mm; the diameter error standard of the positioning section (13) of the rear cabin body is not more than h 7; the axial length L5 of the rear cabin body positioning section (13) is 5-20 mm;
the fixed section (14) is of a cylinder structure; the nominal diameter L3 of the fixed section (14) is 4-12 mm; the axial length L6 is 15-25 mm; the circumferential outer wall of the fixed section (14) is provided with threads;
the front cabin body (2) is provided with a cylindrical through hole (21); during assembly, the positioning section (12) of the front cabin body extends into the cylindrical through hole (21);
the inner diameter of the cylindrical through hole (21) is the same as the diameter of the positioning section (12) of the positioning pin forecabin, and the inner diameter L7 of the cylindrical through hole (21) is 8-16 mm; the diameter error standard of the inner diameter of the cylindrical through hole (21) is not more than H7;
the rear cabin body (3) is provided with a step through hole (31); the diameter L8 of the large-diameter section of the step through hole (31) is 8-16mm, and is the same as the inner diameter of the cylindrical through hole (21) of the front cabin body; the diameter error standard of the large-diameter section of the step through hole (31) is not more than H7; the diameter L9 of the small-diameter section of the step through hole (31) is 6-14 mm;
the assembling process of the positioning pin (1) and the front cabin body (2) and the rear cabin body (3) is as follows:
inserting the positioning pin (1) into the rear cabin body (3) along the axial direction to enable the outer diameters of the rear cabin body positioning section (13) and the fixing section (14) of the positioning pin (1) to be matched with the rear cabin body stepped hole; axial limiting is realized through the matching of the step through hole (31) and the positioning section (13) and the fixing section (14) of the rear cabin body; the outer nut is in threaded fit with the outer wall of the fixing section (14) to realize axial limiting and fixing; sleeving the front cabin body (2) on the outer wall of the front cabin body positioning section (12) from the guide section (11) end of the positioning pin (1) along the axial direction; the end surfaces of the rear cabin body (3) and the front cabin body (2) are butted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811556403.9A CN109538599B (en) | 2018-12-19 | 2018-12-19 | High positioning accuracy anti-drop's cabin section location pinhole structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811556403.9A CN109538599B (en) | 2018-12-19 | 2018-12-19 | High positioning accuracy anti-drop's cabin section location pinhole structure |
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| Publication Number | Publication Date |
|---|---|
| CN109538599A CN109538599A (en) | 2019-03-29 |
| CN109538599B true CN109538599B (en) | 2021-02-09 |
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| CN201811556403.9A Active CN109538599B (en) | 2018-12-19 | 2018-12-19 | High positioning accuracy anti-drop's cabin section location pinhole structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111692176A (en) * | 2020-06-18 | 2020-09-22 | 法兰泰克重工股份有限公司 | Reusable positioning pin structure |
| CN112775195A (en) * | 2020-12-25 | 2021-05-11 | 天津市中重科技工程有限公司 | Novel BD rolling mill manipulator and link plate structure thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678711A (en) * | 2012-05-22 | 2012-09-19 | 西安飞机工业（集团）有限责任公司 | Quick-release positioning pin structure |
| CN103817542A (en) * | 2014-02-23 | 2014-05-28 | 钟大德 | Pin with orientation function |
| CN105090182A (en) * | 2014-05-15 | 2015-11-25 | 上海宇航系统工程研究所 | Repeated positioning device for structure |
| US10001359B2 (en) * | 2016-07-25 | 2018-06-19 | The Boeing Company | Retractable index pins and methods of operating thereof |
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