Geared motor and manufacturing method for geared motor

A manufacturing method for a geared motor, the geared motor comprising:

• a motor main body;
• a frame comprising:
• a first plate part which is fixed to an end part on one side in a motor axial line direction of the motor main body;
• a second plate part which faces the first plate part on the one side;
• and
• a third plate part which connects the first plate part with the second plate part;
• a first fixed shaft which is disposed between the first plate part and the second plate part;
• an output member comprising:
• a shaft hole through which the first fixed shaft is penetrated;
• and
• a gear part and a spiral groove which are provided on an outer peripheral portion of the output member in order from the other side to the one side in the motor axial line direction;
• a second fixed shaft whose shaft end part on the other side is held by the first plate part;
• and
• a transmission gear which is rotatably supported by the second fixed shaft and decelerates rotation of a motor pinion fixed to a rotation shaft of the motor main body to transmit to the gear part;
• the manufacturing method comprising:
• a frame fixing step in which the first plate part is previously provided with a first fixed shaft support hole to which a first shaft end part on the other side of the first fixed shaft is fitted, and the second plate part is previously provided with a through hole to which a second shaft end part on the one side of the first fixed shaft is fitted, and the frame is fixed to the motor main body;
• a gear attaching step in which the transmission gear is attached to the first plate part through the second fixed shaft before or after the frame fixing step;
• an arrangement step in which the output member is disposed between the first plate part and the second plate part from a direction intersecting the motor axial line direction;
• a first fixed shaft inserting step in which the first fixed shaft is inserted into the shaft hole through the through hole and the first shaft end part is fitted to the first fixed shaft support hole;
• and
• a first fixed shaft fixing step in which the second shaft end part and the second plate part are fixed to each other.

A geared motor comprising:

• a motor main body;
• a frame comprising:
• a first plate part which is fixed to an end part on one side in a motor axial line direction of the motor main body;
• a second plate part which faces the first plate part on the one side;
• and
• a third plate part which connects the first plate part with the second plate part;
• a first fixed shaft which is disposed between the first plate part and the second plate part;
• an output member comprising:
• a shaft hole through which the first fixed shaft is penetrated;
• and
• a gear part and a spiral groove which are provided on an outer peripheral portion of the output member in order from the other side to the one side in the motor axial line direction;
• a second fixed shaft whose shaft end part on the other side is held by the first plate part;
• and
• a transmission gear which is rotatably supported by the second fixed shaft and decelerates rotation of a motor pinion fixed to a rotation shaft of the motor main body to transmit to the gear part;
• wherein the first fixed shaft is fixed so that, in a state that a first shaft end part on the other side is fitted to a first fixed shaft support hole provided in the first plate part, and that a second shaft end part on the one side is fitted to a through hole provided in the second plate part, the second shaft end part and the second plate part are fixed to each other, and
• wherein the second shaft end part is fixed to the second plate part by welding.