Motor-assisted single-wheel cart

A motor-assisted single-wheel cart comprising:

• a vehicle body frame;
• a single wheel mounted to a center portion of the vehicle body frame in a lateral direction;
• a battery mounted to the vehicle body frame;
• a motor mounted to the vehicle body frame for generating an assisting power in correspondence to an operation force by a human hand;
• a power transmission mechanism mounted to the vehicle body frame for transmitting an output of the motor to the wheel;
• an operation handle extending rearward from the vehicle body frame;
• and
• a bed mounted to an upper portion of the vehicle body frame;
• wherein the power transmission mechanism comprises a first speed reduction mechanism arranged near the motor, a second speed reduction mechanism arranged near the wheel, and a transmission shaft for connecting the first and second speed reduction mechanisms to one another, an end of the transmission shaft being connected to the first speed reduction mechanism or the second speed reduction mechanism in such a manner as to freely pull out.

A motor-assisted single-wheel cart comprising:

• a vehicle body frame;
• at least one wheel mounted to a central part of the vehicle body frame in a widthwise direction thereof;
• a motor mounted to the vehicle body frame for generating an assisting power in correspondence to an operation force applied by a human hand;
• a power transmission mechanism mounted to the vehicle body frame for transmitting an output of the motor to the wheel;
• a battery mounted to the vehicle body frame;
• a bed mounted to an upper portion of the vehicle body frame;
• an operation handle extending rearwardly and upwardly from the vehicle body frame;
• a grip slidably provided at an end portion of the operation handle;
• an elastic member for biasing the grip to a side of an operator;
• a movement detecting portion for detecting an amount of movement of the grip toward the vehicle body frame;
• and
• a control portion mounted to the vehicle body frame for controlling the motor in response to an output of the movement detecting portion.

A motor-assisted single-wheel cart comprising:

• a frame comprised of a pair of side frame members and at least one cross member interconnecting the frame members in spaced-apart relation in a lateral direction of the frame, each of the side frame members having a first member extending generally transverse to the lateral direction and a second member having opposite end portions connected to the first member;
• an axle mounted for rotation on the second members and disposed forwardly of a central portion of the frame in a longitudinal direction thereof;
• a wheel mounted on the axle for rotation therewith and disposed at a central portion of the frame in the lateral direction thereof;
• a pair of operation handles each extending from one of the first members;
• a motor mounted on the second members for generating an assisting power in accordance with an operation force applied to the operation handles by an operator, the motor being disposed rearwardly of the axle;
• a battery mounted on the second members and extending forwardly of the axle for activating the motor;
• and
• a power transmission mechanism for transmitting an output of the motor to rotate the axle.