PUMP DEVICE

PURPOSE:To reduce the number of screws used for the fixation of a motor, a casing, and a casing cover and facilitate assembly and disassembly by forming a plurality of recessed parts for supporting the casing on a motor end bracket and forming a plurality of projection parts corresponding to the casing. CONSTITUTION:When a casing 2 is installed on a motor 1, a faucet part 21 with the motor 1 of the casing 2 is inserted into the faucet part 22 with the casing 2 of the motor 1, and the arcuate recessed parts 7 and 7 formed on the edge surface of the embler 6 of the motor 1 and the projecting surfaces 8 and 8 which are projectingly installed so as to correspond to the recessed part 7 on the outer peripheral surface of the casing 2 are fitted by revolving the casing 2 around the axis line. After the fitting, a screw inserted into a hole part 14 formed on the casing 2 is screwed with a tapped hole part 15 formed on the end bracket 6 and fixed. Further, a casing cover is installed by utilizing the recessed part formed on the casing 2.