FIELD: machine engineering.
SUBSTANCE: in the device which includes two rigidly connected detachable drums, pressure and return drums, with the possibility of their engagement/disconnection and regular multiple selection of slack and provision of rope tension by means of locking of return drum relative to fixed base, according to the invention, the ends of teeth of opened toothed rims of the toothed sleeve, external and internal shafts, and a shaft of a pressure drum are made symmetrically bevelled inside recesses of open toothed rims of the sleeve and the shaft at angle of 45±5° with width of vertical platform on the teeth ends equal to 3…4 mm or more by the full height of the teeth of outer and inner open gear rims of toothed sleeve and shaft of the drum. On the ends of the shaft of outer and inner open gear rims of the toothed sleeve, there are annular blind bores of 3 mm width or more made on the depth of teeth bevels end value of diameters: greater than the diameter of hollows of the shaft outer rims and the sleeve, and less than the diameter of the hollows for the inner gear rim of the sleeve. The engagement of teeth when assembling the outer and inner rims of the toothed sleeve with mating toothed rims on drums is made at wide recesses between the teeth of external and internal rims made on toothed sleeve and the drum shaft by means of special modified tooth-cutting involute tool with reduced diameter of recesses. Cuts on the bevelled teeth are made, for example, by an electro erosion tool. The toothed sleeve is made of titanium alloy, for example, BT 20.
EFFECT: simplification of drums assembling operation, reduction of the toothed sleeve weight.
4 cl, 7 dwg
