The invention discloses a trolley. The trolley comprises a trolley seat and a trolley frame, wherein a handle is arranged at the top part of the trolley frame; two sets of crawler type walking mechanisms are symmetrically arranged on the left and right of the bottom part of the trolley frame; each set of crawler type walking mechanism comprises three chain wheels, namely a front chain wheel, a middle chain wheel and a rear chain wheel which are respectively arranged, and a transmission belt sleeving the corresponding three chain wheels, and the outer wheel rim of the corresponding middle chain wheel exceeds the external common tangents of the bottoms of the corresponding two front and rear chain wheels. When the trolley disclosed by the invention is adopted while walking on a flat road, the outer wheel rim of the corresponding middle chain wheel exceeds the external common tangents of the bottoms of the corresponding two front and rear chain wheels, so that during turning, by only gently lifting and then downwardly pressing the handle, only the transmission belt at the middle chain wheel can be in contact with the ground, and the transmission belt close to the front and rear chain wheels can be divorced from the ground, and thus, the problem that a frictional resistance between the transmission belt and the ground is extremely large cannot occur during turning.
Trolley
2015-05-27
Patent
Elektronische Ressource
Englisch
IPC: | B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS |