Helicopter rotor head structure
AssigneeTibet Chuangbo General Aviation Technology Co., Ltd.
InventorBo Zhang
Life of this patent
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Abstract
A helicopter rotor head structure comprises a hub, a holder, a bearing and a pitch change mechanism. The hub is provided at the top of a main rotor mast. A connecting shaft is provided in the hub. An end of the connecting shaft extends to the outside of the hub and has the bearing sleeved thereon. The end of the holder facing away from a blade is sleeved on the bearing, and is rotationally connected to the connecting shaft. The bearing comprises an angular contact bearing, a thrust roller bearing and a deep groove ball bearing which are provided in sequence in the length of the connecting shaft. The pitch change mechanism is sleeved on the main rotor mast, and is connected to the holder.
Claims9
A helicopter rotor head structure, comprising a hub (4), a holder (5), a bearing and a pitch change mechanism, wherein the hub (4) is provided at a top of a main rotor mast (1), a connecting shaft (7) is provided in the hub (4), an end of the connecting shaft (7) extends to an outside of the hub (4) and has the bearing sleeved thereon, and an end of the holder (5) facing away from a blade is sleeved on the bearing, and is rotationally connected to the connecting shaft (7);
- the bearing comprises an angular contact bearing (8), a thrust roller bearing (9) and a deep groove ball bearing (10) which are provided in sequence in a length direction of the connecting shaft (7), and the deep groove ball bearing (10) is provided near the end of the connecting shaft (7);
- and
- the pitch change mechanism is sleeved on the main rotor mast (1), and is connected to the holder (5), wherein a sleeve (12) is provided at the end of the holder (5) connected to the connecting shaft (7), an annular flange (17) is provided on an inner wall of the sleeve (12) and is located between the angular contact bearing (8) and the thrust roller bearing (9) when mounted, and two sides of the annular flange (17) abut against the angular contact bearing (8) and the thrust roller bearing (9) respectively.
Dependencies are inferred from the claim text.