GUN BREECH BLOCK DRIVE WITH LINEAR FEED OF BREECH BLOCK OR ROUND Russian patent published in 2014 - IPC F41A7/08 

FIELD: machine building.

SUBSTANCE: drive 100 of breech block 20 comprises motor 2 with crank 2 driven via its shaft M, con-rod 3 arranged so that its rear end E_h displaces in groove 1.1 of crank 1 while its front end E_v engages via gear 9 with breech block 20 or its dog 4. Crank 1 and con-rod 3 are engaged via axle 11 fitted in groove 1.1. Rear end E_h of con-rod 3 is furnished with at least one sliding means 5 to displace in control groove 6. Control groove 6 is a closed curvilinear element and has definite sections (α₁, α₂, α₃, α₄) as the breech block motion profile. Breech block dog 4 or its section has a rim engaging with gear 9 running on con-rod 3 at its front. Breech block 30 is driven by con-rod 3 at revolving crank 1.

EFFECT: smooth operation of breech block, higher rate of fire.

8 cl, 5 dwg