CIRCUMFERENTIAL LOCKING MECHANISM AND BATTERY LOCKING DEVICE COMPRISING SAME, POWER BATTERY PACK, AND VEHICLE

Provided are a circumferential locking mechanism, a battery securing device comprising same, a traction battery, and a vehicle. The circumferential locking mechanism comprises: a first component comprising an inner ring gear (), the inner ring gear () having inner straight teeth () distributed along an inner circumference; a second component comprising an outer ring gear () and a tightening sleeve (), the outer ring gear () having outer straight teeth () distributed along an outer circumference, the tightening sleeve () being fixed inside the outer ring gear () in an embedded manner, wherein the inner straight teeth () are adapted to engage with the outer straight teeth ().