PROBLEM TO BE SOLVED: To provide a universal joint which is high in a holding force with respect to a shaft member to be fit, and can prevent the fletching wear of a serration tooth caused by a stress concentration, and a steering device having the universal joint.SOLUTION: At an internal peripheral face of a connecting part 30, a first toothless part 56 is arranged in a prescribed range at one side of a circumferential direction with a slit 42 sandwiched, and a second toothless part 58 is arranged in a prescribed range at the other side of the circumferential direction. When it is assumed that a female serration is formed over the whole periphery of the internal peripheral face, the range of the first toothless part 56 is set as a range which reaches a female serration tooth 52a having a tooth face at which one tooth face forms a right angle with respect to a center axial line of a bolt penetration hole 44, or one tooth face forms an inclination angle which is most approximate to a right angle from a portion corresponding to the slit 42, and the range of the second toothless part 58 is set as a range which reaches a range terminal end at which the bolt penetration hole 44 intersects with a fitting hole 36 from the portion corresponding to the slit 42 when viewed from the axial direction.

    【課題】嵌合される軸部材に対する保持力が高く、且つ応力集中によるセレーション歯のフレッティング磨耗を防止することができる自在継手、および該自在継手を備えたステアリング装置を提供すること。【解決手段】連結部30の内周面には、スリット42を挟んで周方向一方側の所定範囲に第1の欠歯部56が設けられ、周方向他方側の所定範囲に第2の欠歯部58が設けられ、第1の欠歯部56の範囲は、内周面の全周に雌セレーションを形成したと仮定した場合に、スリット42に対応する部分から、一方の歯面がボルト挿通孔44の中心軸線に対して直角または最も直角に近い傾斜角度となる歯面を有する雌セレーション歯52aまでの範囲とし、第2の欠歯部58の範囲は、軸方向から見て、スリット42に対応する部分から、ボルト挿通孔44が嵌合孔36と交差する範囲終端までの範囲とする。【選択図】図5


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    Title :

    UNIVERSAL JOINT AND STEERING DEVICE HAVING THE UNIVERSAL JOINT


    Additional title:

    自在継手および該自在継手を備えたステアリング装置


    Contributors:

    Publication date :

    2015-09-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / B62D MOTOR VEHICLES , Motorfahrzeuge



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