CN112173090A - Skid undercarriage and crossbeam height adjusting mechanism thereof - Google Patents
Skid undercarriage and crossbeam height adjusting mechanism thereof Download PDFInfo
- Publication number
- CN112173090A CN112173090A CN202011021095.7A CN202011021095A CN112173090A CN 112173090 A CN112173090 A CN 112173090A CN 202011021095 A CN202011021095 A CN 202011021095A CN 112173090 A CN112173090 A CN 112173090A
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- CN
- China
- Prior art keywords
- machine body
- cross beam
- sliding sleeve
- sliding block
- body joint
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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.)
- Pending
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/52—Skis or runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/26—Control or locking systems therefor
Abstract
The invention belongs to the design technology of an undercarriage, and relates to a skid undercarriage and a cross beam height adjusting mechanism thereof. The method comprises the following steps: the left cross beam, the right cross beam, the left machine body joint, the right machine body joint, the sliding block, the machine body joint and the screw rod; the left beam is L-shaped, and the corner of the left beam is connected with the machine body through a left machine body joint; the right cross beam is L-shaped, and the corner of the right cross beam is connected with the machine body through a right machine body joint; the left end and the right end of the sliding block are provided with first through holes along the course of the machine body, the right end of the left cross beam is provided with two lugs which are connected with the first through holes at the left end of the sliding block, and the left end of the right cross beam is provided with two lugs which are connected with the first through holes at the right end of the sliding block; a threaded hole is formed in the center of the sliding block along the vertical direction, and one end of the screw rod is connected with the threaded hole in the sliding block; the other end of the screw is connected with the machine body through a machine body joint and can freely rotate relative to the machine body, and the machine body joint is provided with a limiting device for limiting the axial movement of the screw; the screw rod is used for driving the left and right cross beams to rotate by taking the left and right machine body joints as axes through rotating the distance of the adjusting slide block relative to the machine body.
Description
Technical Field
The invention belongs to the design technology of an undercarriage, and relates to a skid undercarriage and a cross beam height adjusting mechanism thereof.
Background
Skid landing gear consists of a front and rear cross beam and a sliding tube, commonly found on small helicopters. The skid landing gear is used for supporting the helicopter body and buffering landing impact. At present, a plurality of unmanned helicopter landing gears also commonly adopt skid landing gears, the beam structure of the skid landing gears is of an integral type or a left-right butt joint type, and the height of the skid landing gears relative to the ground is of a fixed form and cannot be adjusted. When the van is used for transferring the helicopter, the landing gear or other parts of the helicopter need to be detached due to the limitation of the height of the carriage, so that the workload is increased when the helicopter recovers, and the unmanned helicopter is limited.
Disclosure of Invention
Technical purpose
The skid undercarriage and the crossbeam height adjusting mechanism thereof are provided, and the requirements of different ground heights in various used scenes of a helicopter are met.
Technical content
A skid landing gear beam height adjusting mechanism is composed of a left beam 10, a right beam 20, a machine body joint 30, a right machine body joint 40, a bolt 50, a nut 60, a bolt 70, a nut 80, a machine body joint 90, a pin 100, a gasket 110, a split pin 120, a pin 130, a gasket 140, a split pin 150, a left sliding sleeve 160, a right sliding sleeve 170, a sliding block 180 and a screw 190, wherein a circular through hole is formed in the left beam 10 and connected with the left machine body joint through the bolt 50 and the nut 60, a circular hole is formed in the center of the right end face of the left beam 10 and connected with the outer circle of the left sliding sleeve 160, the left sliding sleeve is allowed to slide in the circular hole of the left beam, the circular through hole is formed in the front end face of the left sliding sleeve 160, the pin 130 penetrates through the hole of the left sliding sleeve 160 and penetrates out of the circular hole in the front end. The center of the upper end face of the sliding block 180 is provided with a threaded through hole, the lower end of the threaded structure arranged on the surface of the screw rod 190 penetrates out of the threaded hole of the upper end face of the sliding block 180, and the screw rod is allowed to rotate around the axis relative to the sliding block 180. The upper end of the screw 190 is fixed to the fuselage point 90, allowing the screw to rotate about the fuselage point 90. The right cross beam 20 is provided with a circular through hole which is connected with the right body joint through a bolt 70 and a nut 80, the center of the left end face of the right cross beam 20 is provided with a circular hole which is connected with the excircle of the right sliding sleeve 170, the right sliding sleeve is allowed to slide in the circular hole of the right cross beam, the front end face of the right sliding sleeve 170 is provided with a circular through hole, the pin 100 penetrates through the hole of the right sliding sleeve 170 and penetrates out of the circular hole on the front end face of the sliding block 180, and the pin is fixed through a cotter pin 120 and a.
By adopting the skid undercarriage crossbeam height adjusting mechanism, when the screw structure is rotated, the screw surface thread structure drives the slider to move up and down, the left sliding sleeve and the right sliding sleeve rotate relative to the slider, the left crossbeam slides along the axis of the left sliding sleeve relative to the left sliding sleeve and rotates around the bolt relative to the left fuselage structure, and the right crossbeam slides along the axis of the right sliding sleeve relative to the right sliding sleeve and rotates around the bolt relative to the right fuselage structure. The lifting and the lowering of the landing gear of the skid are realized through the rotation of the cross beam
When the skid landing gear is used, the left and right cross beams can rotate to realize the height adjustment of the skid landing gear by rotating the screw rod when the height of the landing gear needs to be adjusted.
Drawings
FIG. 1 is a schematic illustration of a skid landing gear;
FIG. 2 illustrates adjustment of the skid landing gear height;
FIG. 3 is an exploded view of a beam connection structure;
FIG. 4 is a partial enlarged view;
in the figure, 10 is a left beam, 20 is a right beam, 30 is a left body joint, 40 is a right body joint, 50 is a bolt, 60 is a nut, 70 is a bolt, 80 is a nut, 90 is a body joint, 100 is a pin, 110 is a spacer, 120 is a cotter pin, 130 is a pin, 140 is a spacer, 150 is a cotter pin, 160 is a left sliding sleeve, 170 is a right sliding sleeve, 180 is a slider, and 190 is a screw.
Detailed Description
A skid landing gear beam height adjusting mechanism is shown in figure 2 and comprises a left beam 10, a right beam 20, a left body joint 30, a right body joint 40, a bolt 50, a nut 60, a bolt 70, a nut 80, a body joint 90, a pin 100, a gasket 110, a split pin 120, a pin 130, a gasket 140, a split pin 150, a left sliding sleeve 160, a right sliding sleeve 170, a sliding block 180 and a screw 190, wherein a circular through hole is formed in the left beam 10 and connected with the left body joint through the bolt 50 and the nut 60, a circular hole is formed in the center of the right end face of the left beam 10 and connected with the outer circle of the left sliding sleeve 160 to allow the left sliding sleeve to slide in the circular hole of the left beam, a circular through hole is formed in the front end face of the left sliding sleeve 160, the pin 130 penetrates through the hole of the left sliding sleeve 160 and penetrates out of the circular hole in the front end face of the sliding block 180. The center of the upper end face of the sliding block 180 is provided with a threaded through hole, the lower end of the threaded structure arranged on the surface of the screw rod 190 penetrates out of the threaded hole of the upper end face of the sliding block 180, and the screw rod is allowed to rotate around the axis relative to the sliding block 180. The upper end of the screw 190 is fixed to the fuselage point 90, allowing the screw to rotate about the fuselage point 90. The right cross beam 20 is provided with a circular through hole which is connected with the right body joint through a bolt 70 and a nut 80, the center of the left end face of the right cross beam 20 is provided with a circular hole which is connected with the excircle of the right sliding sleeve 170, the right sliding sleeve is allowed to slide in the circular hole of the right cross beam, the front end face of the right sliding sleeve 170 is provided with a circular through hole, the pin 100 penetrates through the hole of the right sliding sleeve 170 and penetrates out of the circular hole on the front end face of the sliding block 180, and the pin is fixed through a cotter pin 120 and a gasket 110, so that.
In this embodiment, the left slide pipe 10 and the right slide pipe 20 are hollow tubular structures, the outer diameter is 40mm, the inner diameter is 37, and the diameter of the through hole on the front end surface of the left slide pipe 10 and the right slide pipe 20 is 8.2mm, which can be adjusted according to specific conditions.
In this embodiment, left sliding sleeve 160 external diameter is 37mm, and the left end face sets up the ears structure, has the visual specific case adjustment of 8mm of through-hole diameter on the ear, and right sliding sleeve 170 is the same with left sliding sleeve 160 structure size. When installed, the device is symmetrical relative to the symmetrical plane of the machine body.
In the present embodiment, the thread specification of the threaded hole on the upper end face of the slider 180 is dextrorotation M10x1.5, and the thread specification of the screw is dextrorotation M10x1.5, which can be adjusted according to specific situations.
The working principle of the landing gear centering device is as follows: as shown in fig. 1 and fig. 3, when the screw structure is rotated, the screw surface thread structure drives the sliding block to move up and down, the left sliding sleeve and the right sliding sleeve rotate relative to the sliding block, the left beam slides along the axis of the left sliding sleeve relative to the left sliding sleeve and rotates around the bolt relative to the left machine body structure, and the right beam slides along the axis of the right sliding sleeve relative to the right sliding sleeve and rotates around the bolt relative to the right machine body structure. The lifting and the lowering of the landing gear of the skid are realized through the rotation of the cross beam.
Claims (8)
1. The utility model provides a skid undercarriage crossbeam height control mechanism which characterized in that: the adjustment mechanism shown includes: the left cross beam, the right cross beam, the left machine body joint, the right machine body joint, the sliding block, the machine body joint and the screw rod;
the left cross beam is L-shaped, and the corner of the left cross beam is connected with the machine body through a left machine body joint;
the right cross beam is L-shaped, and the corner of the right cross beam is connected with the machine body through a right machine body joint;
the left end and the right end of the sliding block are provided with first through holes along the course of the machine body, the right end of the left cross beam is provided with two lugs which are connected with the first through holes at the left end of the sliding block, and the left end of the right cross beam is provided with two lugs which are connected with the first through holes at the right end of the sliding block;
a threaded hole is formed in the center of the sliding block along the vertical direction, and one end of the screw rod is connected with the threaded hole in the sliding block; the other end of the screw is connected with the machine body through a machine body joint and can freely rotate relative to the machine body, and a limiting device is arranged on the machine body joint and used for limiting the axial movement of the screw; the screw rod is used for driving the left cross beam and the right cross beam to rotate by taking the left machine body joint and the right machine body joint as axes through rotating the distance between the adjusting slide block and the machine body.
2. A skid landing gear beam height adjustment mechanism as claimed in claim 1, wherein: the adjustment mechanism further comprises: a left sliding sleeve and a right sliding sleeve;
the right end of the left cross beam is of a hollow tubular structure, the left end of the left sliding sleeve is cylindrical, and the left end of the left sliding sleeve is sleeved at the right end of the left cross beam and can slide relative to the left cross beam; the right end of the left sliding sleeve is provided with two lugs;
the left end of the right cross beam is of a hollow tubular structure, the right end of the right sliding sleeve is cylindrical, and the right end of the right sliding sleeve is sleeved at the left end of the right cross beam and can slide relative to the right cross beam; and the left end of the right sliding sleeve is provided with two lugs.
3. A skid landing gear beam height adjustment mechanism as claimed in claim 2, wherein: the double lugs at the right end of the left sliding sleeve are connected with the first through hole at the left end of the sliding block through pins; and the double lugs at the left end of the right sliding sleeve are connected with the first through hole at the right end of the sliding block through pins.
4. A skid landing gear beam height adjustment mechanism as claimed in claim 3, wherein: a second through hole is formed in the corner of the left cross beam and the right cross beam; the lower end of the left sliding block joint is provided with two lugs and is connected with the left cross beam through a bolt; the lower end of the right sliding block joint is provided with two lugs and is connected with the right cross beam through a bolt.
5. A skid landing gear beam height adjustment mechanism as claimed in claim 4, wherein: the pin is a polished rod with a convex shoulder at one end; and the other end of the pin is provided with a third through hole and is limited by a cotter pin.
6. A skid landing gear beam height adjustment mechanism as claimed in claim 5, wherein: the middle part of the bolt is a polished rod, one end of the bolt is a nut, and the other end of the bolt is connected with the nut through threads.
7. A skid landing gear beam height adjustment mechanism as claimed in claim 2, wherein:
the overlapping length of the left sliding sleeve, the right sliding sleeve, the left cross beam and the right cross beam is not less than 10mm in any state of the skid.
8. A skid undercarriage characterized by: the landing gear includes: a left slide tube, a right slide tube and two sets of adjusting mechanisms as claimed in any one of claims 1 to 7; the left ends of the left cross beams of the two sets of adjusting mechanisms are fixedly connected with the left sliding pipe; the right ends of the right cross beams of the two sets of adjusting mechanisms are fixedly connected with the right sliding pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021095.7A CN112173090A (en) | 2020-09-25 | 2020-09-25 | Skid undercarriage and crossbeam height adjusting mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021095.7A CN112173090A (en) | 2020-09-25 | 2020-09-25 | Skid undercarriage and crossbeam height adjusting mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112173090A true CN112173090A (en) | 2021-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011021095.7A Pending CN112173090A (en) | 2020-09-25 | 2020-09-25 | Skid undercarriage and crossbeam height adjusting mechanism thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN112173090A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101482A (en) * | 2023-04-17 | 2023-05-12 | 成都沃飞天驭科技有限公司 | Aircraft test platform, landing gear thereof and design method of landing gear |
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| US1968637A (en) * | 1932-04-26 | 1934-07-31 | Dornier Metallbauten Gmbh | Landing chassis for aircraft |
| US3954232A (en) * | 1974-11-11 | 1976-05-04 | The Boeing Company | Kneelable aircraft landing gear |
| US5897077A (en) * | 1996-08-02 | 1999-04-27 | Mcdonnell Douglas Helicopter Co. | Quick-change skid landing gear |
| US20110233323A1 (en) * | 2010-03-29 | 2011-09-29 | Eurocopter Deutschland Gmbh | Skid-type landing gear for a helicopter |
| US20120080560A1 (en) * | 2010-10-05 | 2012-04-05 | Eurocopter | Skid landing gear and an aircraft provided with such landing gear |
| CN202807093U (en) * | 2012-09-14 | 2013-03-20 | 马永政 | Sledge-wheel-combined-type middle-and-small-sized unmanned aerial vehicle undercarriage system |
| CN104787312A (en) * | 2015-04-07 | 2015-07-22 | 中国直升机设计研究所 | Cross beam structure of skid landing gear |
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| US3954232A (en) * | 1974-11-11 | 1976-05-04 | The Boeing Company | Kneelable aircraft landing gear |
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| CN111439376A (en) * | 2020-03-16 | 2020-07-24 | 陕西中航气弹簧有限责任公司 | High-attitude skid undercarriage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101482A (en) * | 2023-04-17 | 2023-05-12 | 成都沃飞天驭科技有限公司 | Aircraft test platform, landing gear thereof and design method of landing gear |
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Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |