CHANGEABLE HALF-TRACK Russian patent published in 2008 - IPC B62D55/04 

FIELD: transport.

SUBSTANCE: invention refers to transportation equipment, namely to changeable half-tracks mainly for harvesters for rice, grain, and feed for cross-country capability increase in zones with excessive soil humidity. Changeable half-tracks contain two parallel caterpillar propulsive devices. Each caterpillar propulsive device includes drive sprocket, frame with track rollers, guide wheels with stretching gear covered by looped essentially rubber-reinforced caterpillar band, outer and inner cross-pieces installed on both sides of drive sprocket. Inner cross-piece is supplied with rollers. Between basements of outer and inner cross-pieces flexible element in form of spring is secured by special screw with adjustable length. On basements of outer and inner cross-pieces and upper surface of frame there may be coaxially welded guide bushes with possibility of installment of spring-form flexible element thereon. On casing of side driving axle reduction gear there may be installed a bracket with tracing master and arrester for inner cross-piece roller.

EFFECT: saving of time and labour in retooling vehicle from wheel gear to half-tracks and vice versa, operator working conditions are improved.

3 cl, 3 dwg