Abstract: An amphibian motor vehicle comprises a watertight engine room formed in a lower part of a vehicle body, an air intake opening formed at a front part of the vehicle body such that the air intake opening is positioned above water level when the amphibian motor vehicle cruises on water, an air passage separated from the engine room and generally extending in a longitudinal direction of the vehicle body from the air intake opening and a radiator disposed in the air passage for air cooling a coolant flowing into the radiator from the engine.

Abstract: A joint structure for an axle housing ball-end, in which the mounting surface of a knuckle mounted on an axle casing is inclined at a predetermined angle with respect to the horizontal axis of an axle, for example, about 4.degree., the position of a seal mounted on the knuckle being inclined at a predetermined angle with respect to a spherical portion of the respective ends of the axle housing, and each end of an axle shaft disposed in the spherical portion of each of the axle housing ends forming the outer race of a constant-velocity joint.

Abstract: In a joint structure for an axle, the outer race of a constant-velocity joint is formed at the end of an axle shaft disposed inside a hollow spherical portion of a tubular axle, a seal fitted to a knuckle is disposed in such a manner as to cross the axes of a pair of king-pins disposed in a vertical direction, the fitting position of the seal is substantially the largest diameter position of the hollow spherical portion of the tubular axle, the knuckle consists of a knuckle portion supported rotatably by the king-pin on the upper side and a knuckle portion supported rotatably by the king-pin on the lower side, and the seal is clamped between the knuckle portion on the upper side and the knuckle portion on the lower side. Accordingly, the annular seal is slidable substantially to the part of the hollow spherical portion with the swinging movement of the knuckle, which part is the connection of the hollow spherical portion with the end of the tubular axle, and a steering angle can thus be increased.

Abstract: The present invention relates to automobiles, each featuring a low floor realized by introducing the frame which is fabricated with the inter-member gap of the frame members narrowed in the vicinity of the rear driving axle system, and assembled approximately flat over the range extending from the front to the rear of the rear driving axle system, allowing the above-ground level to be lowered as much as possible with the frame being assured freedom from interference by the rear driving axle system.