| 摘要 |
PURPOSE:To prevent damage of parts by disposing a supprt pin and a support shaft on a shaft to which torque is transmitted, engaging the base end surface of a torque transmission lever with the support shaft and extending a spring between the forward end portion of the torque transmission lever and the support pin. CONSTITUTION:A support 41 is disposed at the center of the end surface of a shaft 38 to which torque is transmitted, and support shafts 42a, 42b are disposed symmetrically about the support pin 41. The base end surface of a torque transmission lever 46 is engaged with the support shafts 42a, 42b, and a spring 44 is extended between the forward end portion of the torque transmission lever 46 and the support pin 41. In this arrangement, when torque more than a fixed works upon the shaft 38 to which torque is transmitted, the torque transmission lever 46 is automatically released to control the working torque below a fixed value, so that related parts connecting with the shaft 3 to which torque is transmitted can be prevented from being damaged. |
