| 摘要 |
PURPOSE:To supply hydraulic pressure to a rear wheel brake cylinder neither too much nor too less in an intermediate load by permitting the displacement starting point of a valve to depend on a cam having at least three contacting faces. CONSTITUTION:The relative displacement between a vehicle body and an axle is conveyed to a cam 4 through a links 6, 7, the cam 4 is rotated in a clockwise direction. This rotation continues until the rotation is balanced with the resilient force of a torsion spring 8, and any of contacting faces 11-13 is opposed to a piston 14. In this state, when the braking is carried out, pressure oil is supplied to the chamber 17 for an inflow from a master cylinder, and further flows into the bore 3 for the piston. By this pressure oil, the piston 14 is displaced against the resilient force of spring material 32 to contact with any of the contacting faces 11-13. On the other hand, by the inflow of the pressure oil into the chamber 17 for the inflow, a valve 16 is intended to displace, however, the valve can not be displaced until the valve overcomes the resilient force of the spring material 32, and during the period, the pressure oil flows into a brake cylinder through said passage. |
