IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0304910
(2002-11-26)
|
우선권정보 |
IT-TO2001A1121 (2001-11-30) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
3 |
초록
▼
An undercarriage for a helicopter, having a supporting structure connectable to the fuselage of the helicopter, a wheel suspended from the supporting structure, and a shock absorbing member which has a bottom end portion hinged to the wheel, and is interposed, in use, between the wheel and the fusel
An undercarriage for a helicopter, having a supporting structure connectable to the fuselage of the helicopter, a wheel suspended from the supporting structure, and a shock absorbing member which has a bottom end portion hinged to the wheel, and is interposed, in use, between the wheel and the fuselage. The supporting structure has an attachment fixable to the fuselage, and a first and a second beam having first connecting portions hinged about a first axis to each other and to a top end portion of the shock absorbing member. Second connecting portions are connected to separate portions of the attachment in articulated manner and lower down with respect to the first connecting portions.
대표청구항
▼
1. An undercarriage for a helicopter, comprising: a supporting structure connectable to a fuselage of the helicopter; at least one wheel suspended from said supporting structure; and at least one shock absorbing member which has a first end portion hinged to said wheel, and is interposed, in us
1. An undercarriage for a helicopter, comprising: a supporting structure connectable to a fuselage of the helicopter; at least one wheel suspended from said supporting structure; and at least one shock absorbing member which has a first end portion hinged to said wheel, and is interposed, in use, between the wheel and said fuselage; wherein said supporting structure comprises an attachment fixable to said fuselage; and a first and a second beam having first connecting portions hinged about a first axis to each other and to a second end portion of said shock absorbing member, and second connecting portions connected to separate portions of said attachment in articulated manner and lower down with respect to said first connecting portions. 2. An undercarriage as claimed in claim 1, wherein said supporting structure comprises a supporting arm having a first end portion connected to said wheel, and an opposite second end portion hinged to said attachment. 3. An undercarriage as claimed in claim 1, wherein said second connecting portions of said first and said second beam are hinged to said attachment respectively about a second and a third axis, both fixed and parallel to said first axis. 4. An undercarriage as claimed in claim 1, wherein said second connecting portion of said first beam is hinged to said attachment about a fixed second axis parallel to said first axis; and wherein said second connecting portion of said second beam is hinged to a crank member to permit movement of said wheel between an extracted landing position and a stowed in-flight position. 5. An undercarriage as claimed in claim 4, wherein said crank member is hinged to said attachment about a fixed third axis parallel to said first and said second axis, and to said second connecting portion of said second beam about a fourth axis parallel to said first, said second, and said third axis; said undercarriage comprising actuating means acting on said crank member to vary the distance between said first axis and the fixed said third axis, and between said fourth axis and the fixed said second axis, so as to move said wheel up and down between said extracted and stowed positions. 6. An undercarriage as claimed in claim 3, wherein said second and said third axis are located at opposite lateral ends of said attachment. 7. An undercarriage as claimed in claim 5, wherein, in said extracted position of said wheel, said third axis is located higher with respect to a line joining said first and said fourth axis. 8. An undercarriage as claimed in claim 2, wherein said second end portion of said supporting arm is hinged to said attachment about said second axis. 9. An undercarriage as claimed in claim 5, wherein said attachment is box-shaped; and in that at least said actuating means and part of said crank member are housed in said attachment. 10. An undercarriage as claimed in claim 5, wherein said actuating means comprise a jack having one end hinged to said attachment, and an opposite end hinged to said crank member. 11. An undercarriage as claimed in claim 5, wherein said crank member comprises an intermediate portion connected to said attachment to rotate about said third axis; a first lug projecting from said intermediate portion radially with respect to said third axis, and having a free end hinged to said second connecting portion of said second beam; and a second lug projecting from said intermediate portion radially with respect to said third axis, and connected to said actuating means. 12. An undercarriage as claimed in claim 1, wherein said second beam comprises two telescopically connected members respectively defining said first and said second connecting portion of the second beam, and fixed in the desired relative position by releasable fastening means. 13. An undercarriage as claimed in claim 1, wherein said shock absorbing member, said wheel, and said supporting structure define a preassembled unit fixable to a receiving section of said fuselage.
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