| 摘要 |
PROBLEM TO BE SOLVED: To actualize a pin profile capable of reducing the maximum stress acting on a flange pin in order to enhance safety ratio in design of the flange pin. SOLUTION: A press-fitted portion 8b having a pin diameter D2 press-fitted into a flange 2, in which the pin diameter D2 is greater than a pin diameter D1 of a connected portion 8a connected with a small cam, is arranged in a columnar shape at the flange pin 8. When driving force of an engine is transmitted to a camshaft of an injection pump, tensile stress acts on the connected portion 8a of the flange pin 8 by means of the load f1 so that this flange pin 2 receives load f1 from the small cam. Further, stress is generated on the flange pin 8 when the flange pin is press-fitted into the flange 2, and the stress acts on the press-fitted portion 8b of the flange pin 8. In this way, a margin (safety ratio in design) of the flange pin 8 can be enhanced since both of stress generated during torque transmission and stress generated when press-fitted into the flange 2 act on different portions of the flange pin 8. |
