Spring biased bayonet coupling for fan blades
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0657902
(1984-10-05)
|
우선권정보 |
DK-0004631 (1983-10-07) |
발명자
/ 주소 |
- Andersen Steen H. (Naestved DKX) Pedersen Bendt O. (Karrebaeksminde DKX)
|
출원인 / 주소 |
- Nordisk Ventilator Co. A/S (Naestved DKX 03)
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
2 |
초록
▼
Axial flow fan blade roots (1) are rotatably journalled to blade shafts (4) by bayonet plug and socket couplings. The socket recesses (30, 31) provide an axial play for the plug cam portions (28, 29). Screws (34, 35) extending through the blade root (1) have shoulders (43) abutting spring members ar
Axial flow fan blade roots (1) are rotatably journalled to blade shafts (4) by bayonet plug and socket couplings. The socket recesses (30, 31) provide an axial play for the plug cam portions (28, 29). Screws (34, 35) extending through the blade root (1) have shoulders (43) abutting spring members arranged between the root and the shaft to thus bias the blade outwardly and establish frictional engagement between the bayonet coupling cam portions and recesses.
대표청구항
▼
A blade with a blade shaft (4) for an impeller of an axial flow fan, said impeller having a wheel rim (3), in which a number af blades are rotatably journalled each with a blade root (1; 48) connected with the blade shaft (4), the blade shaft being connected inside the wheel rim with a common adjust
A blade with a blade shaft (4) for an impeller of an axial flow fan, said impeller having a wheel rim (3), in which a number af blades are rotatably journalled each with a blade root (1; 48) connected with the blade shaft (4), the blade shaft being connected inside the wheel rim with a common adjusting device (10) for turning all the blades around the axes of the blades and blade shafts during rotation of the impeller, characterized in that the blade and the blade shaft (4; 51) are connected by bayonet engagement between these two elements, whereby a part (4; 49) of one element forming a bayonet plug member has at least one pair of opposed cam portions (28, 29; 52, 53) at a distance from its external end, which forms a smooth guide portion (25; 54), said cam portions being adapted for engagement with recesses (30, 31; 55, 56) formed in a bore (27; 57) in a part (1; 50) of the other element forming a bayonet socket member and extending between a bottom portion serving as a fit bore (26) for said smooth guide portion (25; 57) and a pair of opposed internally projecting shoulder portions (32, 33), said recesses (30, 31; 55,56) being formed with a play in the axial direction relative to the axial length of the cam portions (28, 29; 52, 53) of the bayonet plug member, at least two fixation screws (34, 35; 61, 62) extending from the external side of the blade root (1) through threaded bores (36, 37; 63, 64) in the wall of the blade root (1; 48) for insertion of their ends forming smooth guide portions (38, 39) into fit bores (40, 41; 59, 60) in a centering portion (42; 50) of the blade shaft (4) and having inwards relative to said guide portions (38, 39; 59, 60) a shoulder portion (43; 65) for abutment against a spring member (44; 66) arranged between the blade root (1; 48) and the side of said centering portion (42; 50) facing the blade root.
이 특허에 인용된 특허 (2)
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Kolb Werner Bernard (Zweibruecken DT), Lubrication of fan blade bearings.
-
Casacci Severin (La Tronche FRX) Jarriand Paul (Grenoble FRX), Propeller runner having swivelling blades for turbines.
이 특허를 인용한 특허 (2)
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Fogle, John B.; Crosby, Colin M.; Smith, David J.; Tennison, Merritt J.; Purohit, Madhur M., Brushless motor assembly for a fastening tool.
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Noelle, Phillipe; Brown, Mike, Variable geometry nozzle device.
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