Wheeled vehicle, typically mobility scooter, with central and two outer front wheels for improved steering and stability

摘要

A vehicle comprising: steering means for operation by a user,- one or more rear ground- engaging wheels; a first front ground-engaging steerable wheel (34) located substantially in the centre at substantially the front of the vehicle; second and third front ground- engaging wheels (36, 37) located either side of the first front ground-engaging wheel (34) with adjustment means for adjusting the steer angle and the height depending on the steer angle of the first front ground- engaging wheel, the adjustment means being configured such that: when the first front ground- engaging wheel (34) has a straight-ahead steer angle, the steer angles of the second and third front ground-engaging wheels (36, 37) are also straight-ahead and all three front ground- engaging wheels are in contact with the ground; and when the steer angle of the first front ground-engaging wheel (34) is turned such that motion of the vehicle would describe a curve, the steer angle of the front ground-engaging wheel on the outside of said curve is turned at least partly towards the steer angle of the first front ground-engaging wheel, the steer angle of the front ground-engaging wheel on the inside of said curve is not substantially turned towards the steer angle of the first front ground-engaging wheel, and the height of the front ground-engaging wheel on the inside of said curve is raised relative to the height of the front ground-engaging wheel on the outside of said curve, the first front ground- engaging wheel and the front ground-engaging wheel on the outside of said curve remaining in contact with the ground.