HARDNESS GAUGE Russian patent published in 2017 - IPC G01N3/42 

FIELD: construction.

SUBSTANCE: hardness gauge comprises the housing (1) with stands (3) and the base (2) with the central opening. In the housing the ball element (8) with the through opening is installed with the possibility of fixing, in which the guiding pipe (9) is rigidly fixed, along the longitudinal axis of which a rod (13) with the pointer arrow (26), with the removable tip and the replaceable load (16) fixed by the nut (17), is mounted with the possibility of moving. In the guiding pipe wall the longitudinal groove (24) is made, with transverse ledges (25) for the pointer arrow located on the rod perpendicular to its longitudinal axis, and the measuring line (29) is mounted on the pipe surface to indicate the values of the rod lifting and the depth of the tip immersion in the snow cover. The novelty consists in that the housing is made in the form of a clamp with internal ribs (5) on the bottom butt, separated by at least three slots (6). The split cage rests on the ribs, which is covered by the clamp and forms with a ball element the movable connection tightened by means of a bolt (11) and a nut (12), tightening the clamp ends. The lower part of the guiding pipe is provided with four balancing weights (31) uniformly distributed over the surface, one of which is placed coaxially with the longitudinal groove. The rod (13) is provided with additional radial threaded openings (27) arranged in a row in height, and the longitudinal groove of the guiding pipe is made with additional transverse ledges (25) providing the lifting height adjustment of the removable tip having a conical (14 ) or a spherical (15) shape, depending upon the snow cover state. Moreover, the hardness gauge additionally comprises the rod transport position locking mechanism placed in the lower transverse ledge zone, and the rod (13) is made with the possibility of installing the impactor.

EFFECT: increasing the measurement accuracy, reduced labour intensity in the measurements, the simplification of fixing the ball element in the housing, ensuring the movable parts locking during transportation and the expansion of functionalities due to the determination of strength on the surface and by the depth of snow cover with tips of different profiles.

4 cl, 8 dwg