CN117469277A - Single-degree-of-freedom release bearing device capable of rotating around shaft - Google Patents
Single-degree-of-freedom release bearing device capable of rotating around shaft Download PDFInfo
- Publication number
- CN117469277A CN117469277A CN202311358621.2A CN202311358621A CN117469277A CN 117469277 A CN117469277 A CN 117469277A CN 202311358621 A CN202311358621 A CN 202311358621A CN 117469277 A CN117469277 A CN 117469277A
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- Prior art keywords
- hole
- lug
- bushing
- bearing
- knuckle bearing
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- 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.)
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Links
- 238000009434 installation Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/10—Arrangements for locking
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The application belongs to the field of aircraft strength tests, and particularly relates to a single-degree-of-freedom release bearing device capable of rotating around a shaft. Comprising the following steps: a single-lug through hole is formed in one end of the single-lug connector, a through hole boss is arranged in the middle of the single-lug through hole along the circumferential direction, the single-lug through hole is divided into two through hole sections by the through hole boss, and a check ring groove is formed in the outer side of each through hole section; the knuckle bearing comprises two knuckle bearings which are respectively arranged in the corresponding through hole sections; the elastic check rings comprise two elastic check rings which are respectively arranged in corresponding check ring grooves; the connecting piece is provided with a double-lug connector, and two double-lug through holes are formed in the double-lug connector; the bushings comprise two bushings which are respectively arranged in the corresponding double-lug through holes; the bolt assembly comprises a screw rod and a nut, and the screw rod sequentially penetrates through the first bushing, the first knuckle bearing, the second knuckle bearing and the second bushing and is fixed by being matched with the nut. The present application can limit all degrees of freedom except for axial rotation of the single-double ear connection in aircraft strength test load transfer, making the connection a statically determinate connection.
Description
Technical Field
The application belongs to the field of aircraft strength tests, and particularly relates to a single-degree-of-freedom release bearing device capable of rotating around a shaft.
Background
In the ground strength test of an aircraft, a traditional single-lug structure is widely used as a main connecting piece for load transmission, and is usually matched with connecting parts such as a double-lug connector of a test piece, a lever and the like. The traditional single lug is directly connected with the double lug connector, the lever or other structures through the bolt through hole, and the connecting structure works well in a short-time static strength test. However, under the action of long-time fatigue load and under the working environment of largely reciprocating rotation around the connecting shaft, the contact surfaces of the traditional single-lug, connecting bolt, double-lug structure and other devices are severely worn. In the fatigue strength test of the traditional single lug as the main load-transmitting device, frequent inspection and periodic replacement of the device are required; if the test is stopped for a long time, the damaged contact surface is rusted, the degree of freedom of rotation around the shaft is lost, if the damaged contact surface is not found and replaced in time, the recovery test can cause abnormal loading of loading equipment, test pieces and the like to be damaged.
It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present application to provide a single degree of freedom release carrier device for pivoting to solve at least one of the problems of the prior art.
The technical scheme of the application is as follows:
a single degree of freedom release bearing device for pivoting, comprising:
the single-lug connector is characterized in that a single-lug through hole is formed in one end of the single-lug connector, a through hole boss is arranged in the middle of the single-lug through hole along the circumferential direction, the single-lug through hole is divided into a first through hole section and a second through hole section by the through hole boss, a first check ring groove is formed in the outer side of the first through hole section, and a second check ring groove is formed in the outer side of the second through hole section;
the joint bearing comprises a first joint bearing and a second joint bearing, the first joint bearing is installed in the first through hole section, and the second joint bearing is installed in the second through hole section;
the elastic check ring comprises a first elastic check ring and a second elastic check ring, wherein the first elastic check ring is installed in the first check ring groove, and the second elastic check ring is installed in the second check ring groove;
the connecting piece is provided with a double-lug connector, and a first double-lug through hole and a second double-lug through hole are formed in the double-lug connector;
a bushing comprising a first bushing mounted in the first binaural through hole and a second bushing mounted in the second binaural through hole;
the bolt assembly comprises a screw rod and a nut, and the screw rod sequentially penetrates through the first bushing, the first joint bearing, the second joint bearing and the second bushing and then is fixed by being matched with the nut.
In at least one embodiment of the present application, the other end of the single-lug connector is provided with a threaded section for connection with a load cell.
In at least one embodiment of the present application, the first knuckle bearing is mounted in the first through hole section by an interference fit, the second knuckle bearing is mounted in the second through hole section by an interference fit, and the first knuckle bearing and the second knuckle bearing are self-lubricating knuckle bearings.
In at least one embodiment of the present application, the first bushing is mounted in the first binaural through hole by a clearance fit, and the second bushing is mounted in the second binaural through hole by a clearance fit.
In at least one embodiment of the present application,
one end of the first bushing, which is far away from the first knuckle bearing, and one end of the second bushing, which is far away from the second knuckle bearing, are provided with bushing bosses;
and a chamfer is arranged at one end of the first bushing, which is close to the first knuckle bearing, and one end of the second bushing, which is close to the second knuckle bearing.
In at least one embodiment of the present application, the bushing boss is stepped, including first boss portion and second boss portion, the size of first boss portion is greater than second boss portion, when the bushing is installed behind the connecting piece, under the interval of second boss portion, first boss portion with form the clearance between the connecting piece.
In at least one embodiment of the present application, the bushing boss has two oppositely disposed cutting surfaces thereon.
In at least one embodiment of the present application, the nut is a thin nut.
In at least one embodiment of the present application, the screw is in clearance fit with the bushing and the contact surface of the knuckle bearing.
In at least one embodiment of the present application, the screw is provided with an anti-drop hole for matching with an anti-drop pin to realize anti-drop.
The invention has at least the following beneficial technical effects:
the utility model provides a single degree of freedom release bearing device of spool rotation can restrict all degrees of freedom except the axial rotation of single ears connection in aircraft strength test load transmission, makes the connection be quiet connection, does not restrict test piece deformation, rotates in a flexible way simultaneously, effectively reduces the connecting piece wearing and tearing, keeps good working property in long cycle fatigue strength test.
Drawings
FIG. 1 is an isometric view of a pivoting single degree of freedom release carriage according to one embodiment of the present application;
FIG. 2 is a side view of a pivoting single degree of freedom release carriage according to one embodiment of the present application;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a side view of a single ear connector according to one embodiment of the present application;
FIG. 5 is a B-B cross-sectional view of FIG. 4;
FIG. 6 is a schematic diagram of a bushing according to one embodiment of the present application;
FIG. 7 is a schematic view of a bolt assembly according to one embodiment of the present application;
FIG. 8 is an assembly view of a pivoting single degree of freedom release carrier according to one embodiment of the present application.
Wherein:
1-monaural joint; 11-single ear through holes; 12-a through hole boss; 13-a retainer ring groove; 14-thread segments; 2-knuckle bearing; 3-a circlip; 4-lining; 41-bushing boss; 42-cutting surface; 43-chamfering; a 5-bolt assembly; 51-screw; 52-nut; 53-anti-drop holes; 6-connecting piece.
Detailed Description
In order to make the purposes, technical solutions and advantages of the implementation of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Embodiments of the present application are described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present application.
The present application is described in further detail below with reference to fig. 1-8.
The application provides a single degree of freedom release bearing device of rotation around axle, includes: a single lug joint 1, a knuckle bearing 2, a circlip 3, a bushing 4 and a bolt assembly 5.
As shown in fig. 4-5, the single-lug through-hole 11, the through-hole boss 12, the retainer groove 13 and the thread segment 14 are provided on the single-lug connector 1. Specifically, single ear through hole 11 has been seted up to the one end of single ear connector 1, and the middle part of single ear through hole 11 is provided with through-hole boss 12 along circumference, and through-hole boss 12 separates single ear through hole 11 into first through-hole section and second through-hole section, and the outside of first through-hole section is provided with first retaining ring recess, and the outside of second through-hole section is provided with the second retaining ring recess. The knuckle bearing 2 comprises a first knuckle bearing which is arranged in the first through hole section and a second knuckle bearing which is arranged in the second through hole section; the circlip 3 comprises a first circlip, which is mounted in a first circlip groove, and a second circlip, which is mounted in a second circlip groove. The positioning of the joint bearing 2 is realized through two through hole sections on the single-lug connector 1, the installation and the positioning of the circlip 3 are realized through the retainer ring groove 13, after the installation of the circlip 3 is completed, the joint bearing 2 is fixed in the single-lug connector 1, the joint bearing 2 is prevented from sliding out after being loaded, and the threaded section 14 is processed at the other end of the single-lug connector 1 and is used for being connected with a force transducer.
It can be understood that the joint bearings 2 and the circlip 3 are made of hardware products, the two joint bearings 2 are preferably made of self-lubricating type with strong bearing capacity, and the circlip 3 is selected according to the outer diameter of the joint bearings 2. The first joint bearing is installed in the first through hole section through interference fit, the second joint bearing is installed in the second through hole section through interference fit, and the first joint bearing and the second joint bearing are self-lubricating joint bearings. Advantageously, in this embodiment, the joint bearing 2 is preferably in interference fit with the corresponding through hole section, so as to ensure firm installation.
The connecting piece 6 is provided with a double-lug connector, a first double-lug through hole and a second double-lug through hole are formed in the double-lug connector, and the connecting piece 6 can be a double-lug connector, a lever and other connecting parts on the test piece. The bushing 4 comprises a first bushing mounted in the first binaural through hole by a clearance fit and a second bushing mounted in the second binaural through hole by a clearance fit. In this embodiment, the contact surface between the bush 4 and the test piece binaural joint, lever or the like is preferably in clearance fit with H7/g 6. In the preferred embodiment of the present application, the end of the first bushing remote from the first knuckle bearing and the end of the second bushing remote from the second knuckle bearing are each provided with a bushing boss 41; one end of the first bushing, which is close to the first knuckle bearing, and one end of the second bushing, which is close to the second knuckle bearing, are provided with chamfers 43, so that the installation is convenient. In this embodiment, the bushing boss 41 is in a step shape, and includes a first boss portion and a second boss portion, where the size of the first boss portion is greater than that of the second boss portion, and when the bushing 4 is mounted on the connecting piece 6, a gap is formed between the first boss portion and the connecting piece 6 at the interval of the second boss portion, and if the bushing 4 is deformed and blocked inside the connecting parts such as the test piece double-lug connector and the lever after being loaded, the bushing can be picked up by inserting a cutter into the gap. Advantageously, in this embodiment, the bushing boss 41 has two cutting surfaces 42 disposed opposite to each other, and if there is rust on the connecting surface, the cutting surfaces 42 are clamped by a wrench to rotate, and are taken out by a prying means.
Further, as shown in fig. 7, the bolt assembly 5 includes a screw 51 and a nut 52, and the screw 51 is fixed by being fitted with the nut 52 after passing through the first bush, the first knuckle bearing, the second knuckle bearing, and the second bush in this order. In the preferred embodiment of the present application, the screw 51 is in a clearance fit with the bushing 4 and the contact surface of the knuckle bearing 2. In this embodiment, the contact surface of the screw 51 with the bush 4 and the knuckle bearing 2 is preferably in clearance fit with H7/g6, so that the installation can be easily performed. The nut 52 is preferably a universal thin nut that is aesthetically pleasing and weight-reducing. The end of the screw rod 51 is provided with an anti-drop hole 53, and is provided with an anti-drop pin in a matching way, and the anti-drop pin is arranged after the whole single lug is installed, so that the nut is prevented from unscrewing and the bolt is prevented from falling under the action of long-time load.
As shown in FIG. 8, the single-degree-of-freedom release bearing device capable of rotating around the shaft comprises the following steps that firstly, a single-lug connector 1, two knuckle bearings 2 and two circlips 3 are connected to a force transducer through a thread section 14 after being assembled, and the other end of the force transducer is connected with a hydraulic power device; 1 bushing 4 is installed in the screw 51; the power device drives the single-lug connector 1 to be close to the connecting piece 6 such as the double-lug connector of the test piece, the lever and the like, and the screw rod 51 is inserted when the joint bearing 2 coincides with the hole position of the connecting piece 6; installing a 2 nd bush 4; a mounting nut 52; finally, installing an anti-drop pin.
After the installation is completed, the single-degree-of-freedom release bearing device capable of rotating around the shaft is fixed in the middle of the connecting piece 6 such as the test piece double-lug connector and the lever, all degrees of freedom are limited, only the degree of freedom of rotation around the shaft is released, and during normal operation, the device rotates around the shaft, and abrasion to other parts is reduced by means of low friction and self-lubrication rotation characteristics of the joint bearing 2.
The single-degree-of-freedom release bearing device capable of rotating around the shaft is applied to an aircraft strength test, can reduce equipment maintenance and replacement, improves the reliability of a load transfer device, prevents abnormal damage in the test caused by abrasion and rust of a contact surface, and ensures that the aircraft strength test is safely developed.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A single degree of freedom release carrier for pivoting movement comprising:
the single-lug connector comprises a single-lug connector (1), wherein a single-lug through hole (11) is formed in one end of the single-lug connector (1), a through hole boss (12) is arranged in the middle of the single-lug through hole (11) along the circumferential direction, the single-lug through hole (11) is divided into a first through hole section and a second through hole section by the through hole boss (12), a first check ring groove is formed in the outer side of the first through hole section, and a second check ring groove is formed in the outer side of the second through hole section;
-a knuckle bearing (2) comprising a first knuckle bearing mounted in the first through hole section and a second knuckle bearing mounted in the second through hole section;
a circlip (3) comprising a first circlip mounted in the first circlip groove and a second circlip mounted in the second circlip groove;
the connecting piece (6), the connecting piece (6) is provided with a double-lug joint, and a first double-lug through hole and a second double-lug through hole are arranged on the double-lug joint;
a bushing (4) comprising a first bushing mounted in the first binaural through hole and a second bushing mounted in the second binaural through hole;
the bolt assembly (5), the bolt assembly (5) includes screw rod (51) and nut (52), screw rod (51) pass in proper order first bush first joint bearing second joint bearing and behind the second bush, cooperation nut (52) are fixed.
2. The single degree of freedom release bearing device of claim 1 wherein the other end of the single ear joint (1) is provided with a threaded section (14) for connection with a load cell.
3. The single degree of freedom release bearing of claim 1 wherein the first knuckle bearing is mounted in the first through bore section by an interference fit and the second knuckle bearing is mounted in the second through bore section by an interference fit, the first knuckle bearing and the second knuckle bearing being self-lubricating knuckle bearings.
4. The pivoting single degree of freedom release carrier of claim 1 wherein the first bushing is mounted in the first binaural throughbore by a clearance fit and the second bushing is mounted in the second binaural throughbore by a clearance fit.
5. The pivoting single degree of freedom release carrier of claim 4 wherein,
one end of the first bushing, which is far away from the first knuckle bearing, and one end of the second bushing, which is far away from the second knuckle bearing, are provided with bushing bosses (41);
one end of the first bushing, which is close to the first knuckle bearing, and one end of the second bushing, which is close to the second knuckle bearing, are provided with chamfers (43).
6. The single degree of freedom release bearing device of claim 5 wherein the bushing boss (41) is stepped and includes a first boss portion and a second boss portion, the first boss portion being larger in size than the second boss portion, and a gap is formed between the first boss portion and the connecting piece (6) at the interval of the second boss portion when the bushing (4) is mounted to the connecting piece (6).
7. The single degree of freedom release carrier of claim 6 wherein the bushing boss (41) has two oppositely disposed cutting surfaces (42).
8. The pivoting single degree of freedom release carrier of claim 1 wherein the nut (52) is a thin nut.
9. The single degree of freedom release carriage of claim 8 wherein the screw (51) is in clearance fit with the bushing (4) and the contact surface of the knuckle bearing (2).
10. The single degree of freedom release bearing device of claim 9 wherein the screw (51) is provided with a release preventing hole (53) for engaging a release preventing pin to prevent release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311358621.2A CN117469277A (en) | 2023-10-19 | 2023-10-19 | Single-degree-of-freedom release bearing device capable of rotating around shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311358621.2A CN117469277A (en) | 2023-10-19 | 2023-10-19 | Single-degree-of-freedom release bearing device capable of rotating around shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117469277A true CN117469277A (en) | 2024-01-30 |
Family
ID=89635636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311358621.2A Pending CN117469277A (en) | 2023-10-19 | 2023-10-19 | Single-degree-of-freedom release bearing device capable of rotating around shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117469277A (en) |
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2023
- 2023-10-19 CN CN202311358621.2A patent/CN117469277A/en active Pending
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