Motor gear unit for disc brake apparatus and disc brake apparatus

A motor gear unit for a disc brake apparatus, the motor gear unit comprising:

• an electric motor;
• a speed reduction mechanism configured to transmit rotation of the electric motor to a plurality of rotary-to-linear motion conversion mechanisms arranged in a plurality of cylinders provided in a caliper;
• and
• a housing accommodating the electric motor and the speed reduction mechanism,
• wherein the speed reduction mechanism includes a plurality of final gears connected directly or via another member to the plurality of rotary-to-linear motion conversion mechanisms and a power distribution mechanism that includes one support shaft and that is configured to distribute and transmit input power to the plurality of final gears,
• wherein the power distribution mechanism is supported by the housing by supporting and fixing end portions of the support shaft on axially both sides to the housing,
• wherein the power distribution mechanism further includes a gear train that includes a plurality of gears and that is unitized,
• wherein the gear train includes a first output member and a second output member, the first output member and the second output member are gears,
• wherein the first output member and the second output member each includes insertion holes through which the support shaft can be inserted, and are rotatably supported by the support shaft in a state of being separated from each other in an axial direction of the support shaft, and
• wherein the power distribution mechanism further includes a biasing member configured to bias the first output member and the second output member in opposite directions in an axial direction of the support shaft between the first output member and the second output member in the axial direction of the support shaft.