Suspension device for vehicles

A suspension device for a motor driven snow vehicle having a flexible endless track driven by the power taken from the engine of the vehicle by way of a drive sprocket wheel journalled on the front portion of the vehicle body comprising:

• slide rail means arranged longitudinally inside said endless track for holding engagement of the ground-engaging portion of said endless track with the ground and journalling rear idler wheels for said endless track at the rear end thereof,
• front supporting means journalled at the front portion thereof on the vehicle body and having a swingable connection at the rear portion thereof with an intermediate portion of said slide rail means to suspend said slide rail means under the vehicle body, said front supporting means having a rear extension projecting rearwardly of the axis of said swingable connection of the rear portion,
• rear supporting means having a journal connection on the vehicle body at the upper portion thereof and swingably connected at the lower portion thereof with the rear portion of said slide rail means to hold the rear portion of said slide rail means, said rear supporting means having a front extension projecting forwardly of the axis of said journal connection, and
• resilient means connected at the upper and lower ends thereof with said front and rear extensions respectively for biasing said slide rail means downwardly toward the ground by way of said front and rear supporting means to suspend said endless track and for preventing skidding of the rear portion of said endless track.