| 摘要 |
FIELD: mechanics. ^ SUBSTANCE: proposed device comprises modular shell-type casing, rotary shaft whereto the belt end is rigidly locked. Aforesaid belt end can unwind in one direction through the slot of aforesaid modular shell-type casing slot. Tensioning device is arranged opposite aforesaid slot. Modular rotary shaft is coupled with the second tape-type helical spring. C-shaped modular tensioning device incorporates a stepwise shaft and is arranged in the slot opposite the shell-type modular casing slot. It consists of a pair of plates with rounded face-fitted perforated cheeks. Aforesaid rotary modular shaft is arranged in one pair of aligned holes. The other pair of aligned holes accommodate opposite cams of stepwise shaft. Note here that the latter accommodates threaded cylindrical cam of towing hook locked by thrust washer and nut. Spacer washers and friction split crown washers fitted into circular grooves on the stepwise shaft end faces couple the stepwise shaft with face-fitted cheeks. ^ EFFECT: higher safety in towing movable objects. ^ 6 dwg |
