CROSS BELT DEVICE FOR COVERING TIRE OF AUTOMOBILE TRAVELLING ON SNOW-COVERED ROAD

摘要

This invention relates to a cross belt device fitted around a tire of an automobile, which is to travel on a snow-covered road, to prevent the tire from slipping thereon. In a cross belt device (1), an outer ring (4) is supported rotatably on an inner ring (3) secured detachably to a wheel (2) of an automobile, and a plurality of elastically deformable leaf springs (7) are attached radially to this outer ring, cross belts (8) extending across a tread surface (12a) of a tire being connected at one end of each thereof to the outer end portions of the leaf springs and at the other ends thereof to an endless outer circumferential strap (9). The cross belts are adapted to be turned from the positions on the tread surface to the positions away from the tread surface, and vice versa by utilizing the elastic deformation of the leaf springs. When the diameter of the tire varies due to the flexure of the ground-contacting portion thereof occurring while the automobile runs on a road, or, when the cross belts are displaced on the tread surface in the circumferential direction thereof while the automobile runs, the variation of the diameter and the displacement of the cross belts are offset by the elastic deformation of the leaf springs and the rotation of the outer ring.