Four-way oil pressure locking device with proportional valve for controlling pressure

The utility model belongs to the technical field of guide shaft positioning, and discloses a four-way oil pressure locking device with a proportional valve to control pressure, which comprises a bottom plate, four groups of oil pressure lockers are arranged on the bottom plate, a through hole for a guide shaft to pass through is formed in the bottom plate, an oil inlet channel and an oil return channel are arranged in the bottom plate, and the oil inlet channel and the oil return channel are connected with an oil supply device. Oil inlets of the oil pressure locking devices are all connected with the oil inlet channel, oil return openings of the oil pressure locking devices are all connected with the oil return channel, and proportional valves and safety valves are arranged among the oil inlet channel, the oil return channel and the oil supply device. The four sets of oil pressure locking devices are connected through oil ways, so that the four sets of oil pressure locking devices can work synchronously, lock