| 摘要 |
FIELD: tool-making industry. ^ SUBSTANCE: device for measuring adhesion qualities of road cover contains supporting frame, imitator of tire with standard protector samples and their tightening weights, triggering mechanism. Supporting frame is made of telescopic sections entering one another with one central and two jointed swiveling side posts with possible fastening in T-like position. Posts contains extendible pins, holding the frame on the surface of road cover during measurements. Tire imitator and a set of flat tightening weights are combined in common body with water reservoir and dispensing mechanism for sprinkling it onto road cover. Spring engine for moving tire imitator is made with possible cocking thereof by manual drive through a reducer, is also equipped with controller of spring pre-tightness and variable-speed gear for movement speed and traction force of moving branch of pulley block. End of chain of moving branch of pulley block is held in variable-speed gear in accordance to required movement speed of tire imitator on road cover, determined by means of stopwatch with automatic enabling/disabling, performed simultaneously with start-stop of rotation of replaceable circular diagram of automatic recorder with dynamometer, built into immobile branch of pulley block and measuring the value of traction force. ^ EFFECT: possible measurement of forces of sliding friction and friction of rest in longitudinal and transverse directions of motorway road cover in tire contact zone. ^ 2 dwg |
