US 12,280,753 B2
Motor gear unit for disc brake apparatus and disc brake apparatus
Michio Suzuki, Tokyo (JP); Takeshi Kuroki, Tokyo (JP); and Shinichi Yamadera, Tokyo (JP)
Assigned to AKEBONO BRAKE INDUSTRY CO., LTD., Tokyo (JP)
Filed by AKEBONO BRAKE INDUSTRY CO., LTD., Tokyo (JP)
Filed on Jun. 7, 2022, as Appl. No. 17/834,064.
Claims priority of application No. 2021-095598 (JP), filed on Jun. 8, 2021.
Prior Publication US 2022/0388490 A1, Dec. 8, 2022
Int. Cl. F16D 55/226 (2006.01); B60T 1/06 (2006.01); B60T 13/74 (2006.01); F16D 65/18 (2006.01); F16D 121/24 (2012.01); F16D 125/40 (2012.01); F16D 125/48 (2012.01); F16D 125/52 (2012.01)
CPC B60T 13/746 (2013.01) [B60T 1/065 (2013.01); F16D 55/226 (2013.01); F16D 65/18 (2013.01); F16D 2121/24 (2013.01); F16D 2125/40 (2013.01); F16D 2125/48 (2013.01); F16D 2125/52 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A motor gear unit for a disc brake apparatus, comprising:
a housing;
an electric motor;
a speed reduction mechanism; and
a non-excited operation type brake, wherein
the housing includes a motor accommodating portion, a gear accommodating portion, and a brake accommodating portion, and is supported by and fixed to a caliper of the disc brake apparatus,
the electric motor includes a motor shaft which includes a first connection portion connected to the speed reduction mechanism on an axially one side portion and a second connection portion connected to the non-excited operation type brake on an axially another side portion, and is disposed inside the motor accommodating portion,
the speed reduction mechanism is connected to the first connection portion, transmits a rotation of the electric motor to a rotary-to-linear motion conversion mechanism disposed in a cylinder of the caliper, and is disposed inside the gear accommodating portion,
the non-excited operation type brake is connected to the second connection portion, prevents a rotation of the motor shaft during a non-energization period, and is disposed inside the brake accommodating portion,
in a state where the disc brake apparatus is attached to a vehicle body, the motor shaft is disposed so as to be orientated in an upper-lower direction, and the non-excited operation type brake is disposed above the electric motor,
the speed reduction mechanism includes a worm connected to the first connection portion, a worm wheel meshed with the worm, and a plurality of gears, and
a rotation central axis of the worm wheel and rotation central axes of the plurality of gears are disposed substantially parallel to a central axis of the rotary-to-linear motion conversion mechanism.