Rolling unit for use in e.g. supermarket trolley, moving on ground, has rotary axles guided along slots such that axles are moved for separation of bearings arranged close to ground and return to original position by elasticity of link

摘要

The unit (1) has three bearings (2, 3, 6) mounted on a rotary axles (4) carried by a pair of side plate carriers (5). The bearings are kinematically connected to each other by an endless rolling link (7). The carriers comprise cutting guides (8) in a form of two rectilinear guidance slots (9, 10) convergingly arranged at a V-point. The axles are guided along the slots such that the axles are moved automatically for mutual separation of the bearings arranged close to ground (14) under sole effect of pressure force on the ground and return to an original position by elasticity of the link.