HYDRAULIC OIL CYLINDER AND RELATED DEVICES, HYDRAULIC BUFFER SYSTEM, EXCAVATOR AND CONCRETE PUMP

摘要

1. A hydraulic oil cylinder in which the buffer sleeve is located on an additional section of the piston rod with the possibility of axial sliding along the specified additional section located in the rodless cavity, and the end surface of the buffer sleeve facing the lower side of the cylinder body is the first end surface a buffer sleeve; a rodless sealing cavity, an end surface formed in the cavity of the oil cylinder between the oil hole in the rodless cavity and the end position of the end surface of the piston in the rodless cavity during the displacement movement of the piston rod and is configured to block the buffer sleeve and abut against the first end surface of the buffer sleeve to form a sealing surface; at least one oil throttle channel is additionally configured, so that during the process of displacing movement of the piston rod, hydraulic oil located on the side of the sealing surface closest to the piston can flow to the oil hole in the rodless cavity through the oil throttle channel for a period of time from the moment when the first end surface of the buffer sleeve is abutted in the rodless cavity sealing by the end surface to form the sealing surface, to the moment when the piston den to the final position of its diverting movement. 2. The hydraulic oil cylinder according to claim 1, in which at least one throttle oil channel is made axially linearly between the additional section of the piston rod and the buffer sleeve. Hydrave