Oscillating hydraulic cylinder with unidirectionally adjustable rotation angle for electro-hydraulic actuator

The utility model discloses a swing hydraulic cylinder with one-way adjustable rotation angle for an electro-hydraulic actuator, which comprises a gear box, a gear arranged in the gear box, a cylinder barrel arranged above the gear box, a rack arranged in the cylinder barrel, the rack meshed with the gear, a reset mechanism fixed at one end of the cylinder barrel and fixed with one end of the rack, a sealing ring is fixed to the other end of the rack; a first cavity is reserved between the rack and the cylinder cover; a first oil way is formed in the cylinder cover; a cylinder body is arranged on the outer side of the cylinder cover; the first oil way is communicated with the second cavity, the second oil way is communicated with the third cavity, a blocking column is arranged at the inner end of the piston, a channel is formed in the cylinder cover, and the blocking column is arranged in the channel in a penetrating mode. The reverse rotation swing angle of the swing hydraulic cylinder is variable, so that t