Piston of pilot valve structure

The invention provides a piston of a pilot valve structure. The piston is positioned in a piston cavity of a pilot valve part (200), namely a piston assembly with a reset function is used in a three-position electromagnetic slide valve, functions of a traditional piston and a return spring are integrated on the piston assembly, the positions of three sliding valve elements of a traditional three-position valve can be switched only through cooperation between the piston assembly and a pilot flow path, the size of the pilot structure is not obviously changed compared with the size of a traditional pilot structure, and therefore the size of the sliding valve in the length direction is greatly reduced. The embodiment section is saw for the beneficial effects of specific implementations. 本发明提供了一种先导阀结构的活塞,其位于先导阀部(200)的活塞腔内，即在三位电磁滑阀内使用了具有复位功能的活塞组件，将传统的活塞和回复弹簧的功能集成在了活塞组件上，仅用活塞组件和先导流路配合就可以实现传统的三位阀的三个滑阀阀芯位置的切换，而且本实施例的先导结构与传统先导结构在尺寸上并无明显变化，因此滑阀长度方向上大大减小了尺寸。具体实现手段的有益效果参见实施例部分。