Tricycle capable of rolling

A tricycle capable of rolling, comprising:

• a tricycle body having a first frame and a second frame, the first frame having a first pivoting piece and a crank, the second frame having a second pivoting piece pivoted to the first pivoting piece, and at least one wheel shaft being rotatably arranged on the second frame;
• a first linkage assembly arranged on the first frame, the first linkage assembly having a first chain sleeving a first chain wheel and a second chain wheel, and the first chain wheel being coupled to the crank;
• a second linkage assembly arranged on the second frame, the second linkage assembly having a second chain sleeving a third chain wheel and a fourth chain wheel, and the fourth chain wheel being coupled to the wheel shaft;
• and
• a transmission module, having a first universal joint and a second universal joint connected to two ends of a telescopic cylinder respectively, the first universal joint being connected to the second chain wheel, and the second universal joint being connected to the third chain wheel;
• wherein a pivoting frame is capable of pivoting the second frame;
• and the wheel shaft is rotatably arranged on the pivoting frame.