| 摘要 |
<p>A rotary shaft coupling is provided that can accurately transmit rotation of one rotation axis to another rotation axis even when shaft core misalignment is present between the rotation axes, and has superior durability, without generating noise.</p><p>In a rotary shaft coupling 1 including a pair of joint halves 2a and 2b that are respectively attached to opposing axial end sections 12a and 12b and transmit rotation of one axis 11a to another axis 11b, outer teeth 6a of a gear are provided on one joint half 2a and inner teeth 6b that mesh with the outer teeth 6a and have a same number of teeth as the outer teeth 6a are provided on the other joint half 2b. Each outer tooth 6a and each inner tooth 6b are formed to absorb shaft core misalignment between both axes 11a and 11b and perform rotation transmission by having an involuted tooth profile of a same module and a tooth flank of the involuted tooth profile displaced in a circumferential direction.
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