Tire and wheel lift

摘要

A trolley for use in a cable lift having a mast with a generally rectangular hollow cavity forming a track in which the trolley may be reciprocated upwardly and downwardly. The trolley is connected to a cradle outside the mast upon which an object to be lifted may be placed. The trolley has trolley wheels which make rolling contact with a front and back side of the track to resist a forward bending moment in down direction on the cradle. The trolley has spacer wheels which make rolling contact with a right and left sides of the track to resist a lateral bending moment on the cradle such that the cradle may be mounted on the mast offset from centerline.

主权项

1. A trolley for reciprocation upwardly and downwardly in a track having a generally rectangular hollow cavity with smooth inner walls, said track having a front side with a vertical slot, a rear side, a right side and a left side, said trolley comprising a generally elongated platform having a longer axis and having an attachment point for a lifting cable at an upper end, said trolley having a front face and a rear face with upper and lower trolley wheels mounted on wheel axles on the rear face transverse the longer axis, said upper and lower trolley wheels in rolling contact with the front and rear smooth inner walls of the track, upper and lower spacer wheels mounted on spacer axles perpendicular to a bottom face of the platform inboard of the wheel axles, said upper and lower spacer wheels in rolling contact with the right and left smooth inner walls of the track, said trolley reachable through the vertical slot in the track for attachment of a lifting cradle.