| 摘要 |
An impact screw tightening head, which is an example of application of a rotary converting device, comprising a one-way clutch (1), an eccentric structural body (2), and a torque transmission part (3) as shown in the figure, the eccentric structural body (2) further comprising an eccentric part (23) which is formed of shaft end parts (21) and (22) on both sides and displaced from a center (C), its ring part (23a), contact members (24), and so forth, wherein, when the shaft end part on one side (21) is rotated by an input end (11c) through the one-way clutch (1), the eccentric ring part (23) comes into contact with the contact member (24) and the eccentric part (23) deforms so as to store a deformation energy and, when the deformation becomes maximum, the deformation energy is released so as to provide a rotating energy to the eccentric structural body, whereby the rotating energy is transmitted from the contact member to the torque transmission part (3) so as to provide an impact torque to a nut which is to be tightened by a tightening part (32).
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