student hand-made cable pull back car small spring inertia pull back car small production mold profile cable trolley

cable pull back car

the pull-back car is fixedly connected to the gear in the warrior gear according to its rear tire. when the hand works on the car backward (dragging), the rear wheel rotates backward, through the shaft to transmit force to warrior gear to do work, the gear drives warrior gear structure (spring structure or rubber band structure) to convert the kinetic energy made by hand into potential energy (such as rubber band rotation lengthening or spring compression, etc.)

when the hand is released, the car loses a force to keep its balance, that is, the increased friction between the rear tire and the ground when pressing the car by hand (that isf1the grip force usually mentioned in), warrior gear will reverse release potential energy through the shaft to do work, so the shaft converts potential energy into function through rotation.

usually, the pull-back car is designed as the rear wheel front turn drive (that is, the wheel on the left side of the car is counterclockwise), and the warrior gear is designed as the rear turn energy storage (that is, the wheel on the left side of the car is clockwise), and because of the fixed direction of the axle, as long as the warrior gear can be large (that is, the number of revolutions is enough) or the static friction between the wheel and the ground is small enough, the pull-back car can move forward through the energy output of the heart, the warrior gear.

-simply put, pull back car "remember" the power you gave it