Oil buffer with novel shaft seal structure

The utility model discloses an oil buffer with a novel shaft seal structure, and aims at providing the oil buffer with the novel shaft seal structure, and the oil buffer is good in shaft seal performance and long in service life. The oil buffer comprise an outer pressure cylinder, an inner pressure cylinder, a pressure accumulating device, a back cover, a spring, a piston, a piston rod and a bearing, wherein the spring and the piston are arranged in the inner pressure cylinder, the piston rod is connected to the piston, the bearing is arranged on the piston rod in a sleeving mode and is arranged inside the outer pressure cylinder, the bearing is in threaded connection with a bearing cover, an oil seal cavity is formed between the bearing cover and the bearing, an oil seal piece is arranged in the oil seal cavity, grooves are oppositely formed in the wall of the oil seal cavity and are internally provided with compression springs, the compression springs are connected with pressing plates, and the pressing plates are arranged between the compression springs and oil seal pieces and are connected with the oil seal pieces in a collision mode.