Engine piston

The utility model discloses an engine piston belongs to the engine technology field. The utility model discloses a piston head, piston neck and piston guide bar, piston leading end and the separation of piston packaging end, the piston head is as cooperating with the cylinder the piston packaging end, the conduct of piston guide bar piston leading end, the piston neck approximate equal stress ARC shape has, the connecting rod connecting portion have on the piston guide bar. The utility model discloses when realizing that piston leading end and piston packaging end separate for the piston is good with the joining technology nature of connecting rod, and the piston adopts the equal stress design, has increased bending strength, effectively prevents the neck fracture, the reliability and the security that have improved the piston. 本实用新型公开了种发动机活塞，属于发动机技术领域。本实用新型包括活塞头、活塞颈部和活塞导向杆，活塞导向端与活塞密封端分离，所述活塞头作为与气缸配合的所述活塞密封端，所述活塞导向杆作为所述活塞导向端；所述的活塞颈部具有近似等应力弧形形状，所述活塞导向杆上具有连杆连接部。本实用新型在实现活塞导向端与活塞密封端分离的同时，使得活塞与连杆的连接工艺性好，活塞采用等应力设计，