COUPLING STRUCTURE AND SHRINKABLE SHAFT

• Main Author: MORIYAMA SEIICHI
• Format: Patent
• Language: English; Japanese
• Published: 06.07.2022
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a coupling structure capable of securing a torque transfer function and preventing a pair of members from being separated even in a case where a defect occurs in a weld.SOLUTION: A cylindrical part 33 of a joint shaft 13 is inserted inside of a large diameter cylinder part 27 of a first outer cylinder 12, a male serration 34 provided on an outer peripheral surface of the cylindrical part 33 and a female serration 29 provided on an inner peripheral surface of the large diameter cylinder part 27 are concave-convex engaged, and an outer peripheral surface of the joint shaft 13 and an end of the large diameter cylinder part 27 at the other side in an axial direction are welded and fixed by a weld bead part 52. Further, an emboss recess 31 is formed on the bottom of an outer diameter side annular recessed groove 30 which is provided on an outer peripheral surface of the large diameter cylinder part 27, such that an emboss projection 32 formed on the inner peripheral surface of the large diameter cylinder part 27 is disposed inside of an inner diameter side annular recessed groove 35 provided on the outer peripheral surface of the cylindrical part 33.SELECTED DRAWING: Figure 8 【課題】溶接部に欠陥が生じた場合にも、トルク伝達機能を確保することができ、かつ、１対の部材の分離防止を図れる、結合構造を提供する。【解決手段】第一外筒１２の大径筒部２７の内側に、ジョイントシャフト１３の円筒部３３を挿入し、円筒部３３の外周面に備えられた雄セレーション３４と、大径筒部２７の内周面に備えられた雌セレーション２９とを凹凸係合させ、かつ、ジョイントシャフト１３の外周面と大径筒部２７の軸方向他方側の端部とを溶接ビード部５２により溶接固定する。さらに、大径筒部２７の外周面に備えられた外径側環状凹溝３０の底部にエンボス凹部３１を形成することで大径筒部２７の内周面に形成されたエンボス凸部３２を、円筒部３３の外周面に備えられた内径側環状凹溝３５の内側に配置する。【選択図】図８