HYDRAULIC TIGHTENER OF DEVICE FOR TIGHTENING CHAIN Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: hydraulic tightener has housing with opening whose inner surface is provided with bore and groove and plunger received in the housing opening and forming a plunger pair together with the housing. The outer surface of the plunger is provided with two grooves. The stop end face of the plunger interacts with a chain. When the hydraulic tightener is out of operation, the assembling ring is in the housing groove. When the tightener is in operation, the assembling ring is in the first groove of the plunger. The stop ring and bores of the housing and second groove of the plunger form a step mechanism. The housing is made up as a pipe with a thread arranged at its end opposite to the stop end face of the plunger. The hydraulic tightener has a cover that is in contact with the end face of the threaded end of the housing. The cover has a thread to interact with the housing thread. The cover has an opening that is overlapped by a ball check valve. The end face of the cover is provided with a groove for supplying oil to the space of the tightener through the opening in the cover. The end face of the housing that is in contact with the cover has at least one groove for connecting the inner space of the tightener with a lubricating system through gaps in the thread. EFFECT: improved design. 2 cl, 4 dwg