Piston assembly and vehicle comprising same

The invention provides a piston assembly and a vehicle comprising the same. The piston assembly comprises a piston, a piston pin, a piston rod and a driving part, wherein the piston pin is arranged in the piston and provided with a position adjustment mechanism; the piston rod comprises a rod body and rotary connecting part arranged at the end of the rod body; the rotary connecting part is arranged on the piston pin in a sleeving mode and is matched with the position adjustment mechanism; the driving part drives the piston pin to rotate; when the piston pin rotates, the position adjustment mechanism changes the relative positions of the rotary connecting part and the piston. By means of the technical scheme, the problem of low engine efficiency in the prior art is solved. 本发明提供了种活塞组件及具有其的车辆，其中，活塞组件包括：活塞；活塞销，设置在活塞内，活塞销上设置有位置调整机构；活塞杆，活塞杆包括杆体以及设置在杆体的端部的转动连接部，转动连接部套设在活塞销上并与位置调整机构配合；驱动部，驱动部驱动活塞销转动，活塞销转动时，位置调整机构改变转动连接部与活塞之间的相对位置。本发明的技术方案解决了现有技术中的发动机效率低的问题。