Protection device for hydraulic cylinder displacement sensor

The invention discloses a protection device for a hydraulic cylinder displacement sensor. The protection device is characterized by comprising a base (1) consisting of a support (2) and a safe edge (5), wherein two through grooves (3) and two positioning grooves (4) are symmetrically formed in the support (2); a protection cover assembly (13) is mounted on a base and comprises a protection cover (6), a spring (9) and a baffle ring (8), two clamp claws (7) are symmetrically arranged on the outer edge of the top end of the protection cover (6) and matched with the through grooves (3) and the positioning grooves (4) on the support (2), the spring (9) is positioned by the baffle ring (8) in the protection cover (6), the baffle ring (8) is tightly pressed onto the clamp claws (7) by spring force, and two notches (10) are formed in the baffle ring (8) and correspondingly mounted with the clamp claws (7); and a sealing ring mounting groove (11) is formed in the outer edge of the protection cover (6), and stuffing box mounting holes (12) are formed in the bottom. The protection cover cannot fall off during common vibration, stable operation of equipment is effectively guaranteed, and the protection device is convenient to mount and dismount, facilitates daily maintenance and is convenient and fast.