| 摘要 |
FIELD: agricultural engineering, in particular, hand-held digging tools. SUBSTANCE: spade has blade and handle. Blade has rotating detachable disk with continuous cutting edge extending along contour thereof and forearm for handle. Fixing double-armed lever clamp and reciprocating foot stop are inserted into forearm. Rotary detachable disk is inserted in forearm slot and fixed by edge with mounting opening by means of pin-screw and fixing double- armed lever clamp, which is made common for pin-screw and reciprocating foot stop. Disk is rotated or foot stop is reciprocated upon release of fixing double-armed lever clamp. Disk is repositioned upon release of fixing double- armed lever clamp and removal of pin-screw. Sloping grip arm is arranged on spade handle end at an angle to spade handle and to blade and secured to handle. Spade disk may be made in the form of isosceles triangle with rounded angles, convex sides and convex surfaces oriented to apexes of angles. EFFECT: simplified construction, convenient operation, reduced strain for worker and, accordingly, increased efficiency. 2 cl, 8 dwg |
