3
1.
Product Description
1.1
General description
Fig. 1
Wheelchair transformer CaterWil GTS3 with electrical drive is designed to be driven by disabled
person or by the attendant. The wheelchair can overcome different kind of obstacles including stairs.
CaterWil has wheels and tracks platform. Wheels platform is used for moving on a smooth
surface. Track platform is needed for overcoming stairs, curbs and other obstacles. In a wheel mode
the track platform is hidden in its upper position doesn’t slug and doesn’t create resistance for moving.
When the button pressed on a remote control the linear actuator is activated and though the
mechanical system of levers the track platform goes down. Caterpillars are moved by the motors that
rotate the wheels but using the additional gear that provides higher torque and lower speed on stairs.
The passenger’s seat is installed on hinges and turned by the separate drive. Turning the seat
is important when going up and down the stairs for displacing the center of mass and saving a vertical
position of the passenger that is safe and comfortable. The seat is controlled by electronics in
automatic cycle. Three axis sensors accelerometers determines the position of the main platform and
the seat, using the acquired data system smoothly turns the seat leaving it’s constant
position relative
to the horizon.
The power supply of the system is provided by
batteries. Two main drives (left and right) that
rotate wheels or tracks (depends on moving mode) are made as DC gear-motors. Each of three linear
actuators is made as a DC motor driving a rod via a gear system. The actuators strokes are limited by
limit switches.
