Patent ID: 9643633
Date: 2017-05-09
CPC Classifications: A63B,B62B

Claim:
1. A folding structure of a three-wheeled cart, the folding structure comprising: a) a pipe sleeve of a front wheel rack; b) a rotational joint; c) a first joint base; d) a second joint base; and e) a locking mechanism; wherein: the first joint base and the second joint base are symmetrically disposed at two sides of the rotational joint; the locking mechanism is configured to lock the rotational joint; the rotational joint is coupled to the first joint base and the second joint base; the rotational joint comprises a front part and a rear part, and the front part is adapted to rotate in relative to the rear part; the front part of the rotational joint is connected to the pipe sleeve of the front wheel rack and is sleeved with a first gear, and a second gear is disposed in an inner side of the first joint base and is engaged with the first gear; the locking mechanism comprises a pull handle disposed on the rotational joint, a bayonet pin fixed on the pull handle, and a fixture block disposed at a front end of the pull handle; two ends of the bayonet pin are clamped on the first joint base and the second joint base, respectively; a clamping groove is provided at a rear end of the pipe sleeve of the front wheel rack, and the fixture block is clamped in the clamping groove; and a screw is fixed on the rotational joint, the pull handle comprises a strip hole, and the screw is received by the strip hole and is adapted to move in the strip hole.