ATTACHMENT STRUCTURE OF TORQUE CAM MECHANISM

• Main Authors: TABUCHI MOTOKI, IJICHI AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide an attachment structure of a torque cam mechanism which can attach the torque cam mechanism to a rotating shaft by making a key and a key groove engaged with each other while suppressing the lowering of the rigidity of a cam follower.SOLUTION: In an attachment structure of a torque cam mechanism 22, the torque cam mechanism 22 comprising a second member 26 having a plurality of cam followers 27, 28, 29 and 30 which abut on a plurality of cam faces 31, 34 of a first member 25, and move to an axial line direction along irregular shapes of the cam faces 31, 34 is attached to a rotating shaft 18 by making a plurality of keys 17 which are pressure-inserted into an internal peripheral face of the second member 26 engaged with a plurality of key grooves 19 which are formed at an external peripheral face of the rotating shaft 18. The keys 17 are pressure-inserted into a position which is displaced in phase from a position in which the cam followers 27, 28, 29 and 30 are arranged, and the rigidity of the key 17a which is fit to the key groove 19a whose distance between the adjacent key groove 19b in a direction in which the key grooves 19 receive torque from the keys 17 is longest is set higher than those of the other keys 17b, 17c. 【課題】カムフォロアーの剛性が低下することを抑制しつつ、キーとキー溝とを噛み合わせてトルクカム機構を回転軸に取付けることができるトルクカム機構の取付け構造を提供する。【解決手段】第１部材２５の複数のカム面３１，３４に当接してカム面３１，３４の凹凸形状に沿って軸線方向に移動する複数のカムフォロアー２７，２８，２９，３０を有する第２部材２６を備えたトルクカム機構２２を、第２部材２６の内周面に圧入された複数のキー１７を回転軸１８の外周面に形成された複数のキー溝１９に噛み合わせて回転軸１８に取り付けるトルクカム機構２２の取付け構造において、カムフォロアー２７，２８，２９，３０が設けられる位置との位相がずれた位置にキー１７が圧入されるとともに、キー１７からキー溝１９がトルクを受ける方向での隣り合うキー溝１９ｂとの距離が最も長いキー溝１９ａに嵌合するキー１７ａの剛性が、他のキー１７ｂ，１７ｃの剛性よりも高く形成されている。【選択図】図１