The invention discloses a hydraulic support
pulley, which comprises a cylinder
barrel, a parallel cap, a locking
washer, a
piston, a first sealing element, a second sealing element, a wear-resisting ring, a return spring, an anti-rotating shaft, a shaft sleeve, a positioning slide block, a support bracket, an oil
nozzle, a
pulley shaft, a bearing, a
pulley and an oil inlet hole, the middle part ofthe outer circle of the cylinder
barrel is provided with the anti-rotating shaft, the left end of the cylinder
barrel is provided with the oil inlet hole, the right end of the cylinder barrel is provided with the support bracket, the support bracket is provided with the pulley shaft, the pulley shaft is provided with the pulley through the bearing, and the oil
nozzle is arranged above the pulleyshaft. The left end of the cylinder barrel is also provided with the parallel cap through the locking
washer, the
piston is arranged in the cylinder barrel through the first sealing element and the second sealing element, the
piston is internally provided with the return spring, and one end of the return spring is matched with the positioning slide block. The anti-rotating shaft is arranged in thepositioning slide block, the right end of the positioning slide block is fixedly connected with the support bracket. The support bracket is matched with the inner wall of the right end of the cylinder barrel through the shaft sleeve. The pulley has a multi-function effect of anti-rotation and positioning.