Heavy load type encoder with high protection performance

The utility model relates to the technical field of machinery, and discloses a heavy load type encoder with high protection performance, which comprises a shell, a base is fixedly arranged in the shell, a main shaft is fixedly arranged at the top end of the base, and an O-shaped ring I is fixedly arranged at the matching position of the base and the shell. A circuit board assembly, a guider, a code disc, a photoelectric ruler and a supporting column are fixedly installed at the bottom end of the base, a code disc pressing ring is fixedly installed between the code disc and the base, a cable is fixedly connected to the wiring position of the circuit board assembly, and an end cover is fixedly installed at the bottom end of the shell. When the encoder is installed and maintained, the end cover is opened firstly, and a wrench and an internal hexagonal wrench are matched to install and detach the screw, so that the problems of poor installation reliability and rotation jumping of the encoder are avoided; by adopt