To provide a blade angle changing device for a small type variable pitch propeller with high mechanical strength.SOLUTION: A blade angle changing device 15 includes: a hub 13 provided on a hollow propeller rotational shaft 10; a propeller 12 having a stem 17 attached to be capable of rotating to the hub; a change shaft 20 provided to be coaxial inside the propeller rotational shaft to be capable of rotating; a screw unit 21 formed with a two direction screw and attached to the angle changing shaft in the hub; a pair of cross heads 22, 23 engaging with the two direction screw; and a swing arm 24 provided to be freely rocked through a supporting shaft 26 to each cross head, and the stem and a pair of swing arms are connected by an engaging pin 27. The propeller is changed by having the pair of cross heads move in reverse directions to each other.SELECTED DRAWING: Figure 1
【課題】機械的強度が高い小型の可変ピッチプロペラの翼角変節装置を提供する。【解決手段】翼角変節装置15は、中空のプロペラ回転軸10に設けられたハブ13と、ハブに回動可能に取り付けられた基部17を有するプロペラ12と、プロペラ回転軸の内部に同軸で回転可能に設けられた変節軸20と、2方向のねじが形成されてハブ内で変節軸に取り付けられたねじ部21と、2方向のねじに噛み合う一対のクロスヘッド22,23 と、各クロスヘッドに支軸26を介して揺動自在に設けられたスイングアーム24を備え、基部と一対のスイングアームが係合ピン27で接続されている。一対のクロスヘッドが互いに逆方向へ移動することでプロペラが変節する。【選択図】図1
BLADE ANGLE CHANGING DEVICE FOR VARIABLE PITCH PROPELLER AND GYRATION TYPE VESSEL PROPULSION DEVICE
可変ピッチプロペラの翼角変節装置及び旋回式船舶推進装置
2020-01-30
Patent
Electronic Resource
Japanese
OPERATIONAL FORCE TRANSMISSION MECHANISM FOR GYRATION TYPE VESSEL PROPULSION DEVICE
European Patent Office | 2020
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