US 11,904,924 B1
Motorised trolley
Wing Leung Chow, Pok Fu Lam (HK)
Assigned to LOGISTICS AND SUPPLY CHAIN MULTITECH R & D CENTRE LIMITED, Pok Fu Lam (HK)
Filed by Logistics and Supply Chain MultiTech R&D Centre Limited, Pok Fu Lam (HK)
Filed on Aug. 11, 2022, as Appl. No. 17/885,900.
Claims priority of application No. 32022057424.0 (HK), filed on Jul. 27, 2022.
Int. Cl. B62B 5/00 (2006.01); B62B 5/04 (2006.01)
CPC B62B 5/0056 (2013.01) [B62B 5/0073 (2013.01); B62B 5/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A motorised trolley comprising:
a chassis with a load platform;
left and right drive wheels mounted to the chassis, wherein a respective electric drive motor drives each of the drive wheels;
an electromechanical service brake on each of the left and right drive wheels;
an auxiliary brake that mechanically biases at least one of the left and right drive wheels to a braked state;
at least one electric release actuator for releasing the auxiliary brake;
a receptacle adapted to receive a power source for supplying power to the drive motors, the electromechanical service brake and the at least one electric actuator;
handle-mounting structure fixed at its lower end to the chassis;
an elongate handlebar;
a pair of force-sensing couplings connecting longitudinally spaced parts of the handlebar to the handle-mounting structure, each force-sensing coupling comprising a resilient member and a load sensor for sensing forces applied by a user to the handlebar and transmitting respective load signals, and
a controller that receives the load signals and controls a current applied to the electric drive motors so as to amplify the force sensed by the force-sensing couplings and to generate a torque proportional to a force applied by the user to the handlebar and to actuate the at least one electric release actuator when the force applied by the user to the handlebar exceeds a threshold.