| 摘要 |
PROBLEM TO BE SOLVED: To provide a pilot type attenuation force adjustment type buffer capable of obtaining appropriate attenuation force.SOLUTION: A large diameter part 46C and a small diameter part 46D are provided in a valve body 46 of a control valve 28 provided in a pilot passage. The small diameter part 46D contacts with a fail valve 59 at the time of fail, and the large diameter part 46C always contacts with a fail spring 55 to be bias means. An area in which the valve body 46 receives pressure of a working fluid can be reduced by dividing the function of the valve body 46, and thereby appropriate attenuation force can be obtained. |
