Electrically operated brake including two electric motors connected to planetary gear device, and braking system including such brake or brakes
AssigneesToyota Jidosha Kabushiki Kaisha, Asmo Co., Ltd.
InventorsKenji Shirai, Yasunori Yoshino, Yoshinori Takemura, Seiya Yokoyama
Life of this patent
Estimating the term…
Abstract
An electrically operated brake for braking a moving body, including two electric motors and a planetary gear device having a sun gear, at least one planetary gear and a ring gear, wherein the two electric motors are connected to two members of the planetary gear device and the third member of the planetary gear device rotates an output shaft which operates a friction member driving device to move a friction member for braking the moving body.
Claims20
An electrically operated brake for braking a moving body with a friction force, comprising:
- a friction member for braking the moving body;
- two electric motors;
- a planetary gear device including a sun gear, a plurality of planetary gears meshing with said sun gear, a carrier rotatably supporting said at least one planetary gear, and a ring gear meshing with said at least one planetary gear, said two electric motors being connected to respective two members selected from among three members consisting of said sun gear, said carrier and said ring gear;
- an output shaft connected to and rotated by one of said three members other than said two members;
- and
- a friction member driving device operable by rotation of said output shaft, to move said friction member.
An electrically operated braking system comprising:
- a brake operating member;
- a brake operating amount sensor for detecting an amount of operation of said brake operating member;
- an electrically operated brake for braking a moving body with a friction force, including:
- a friction member for braking the moving body;
- two electric motors;
- a planetary gear device including a sun gear, a plurality of planetary gears meshing with said sun gear, a carrier rotatable supporting said at least one planetary gear, and a ring gear meshing with said at least one planetary gear, said two electric motors being connected to respective two members selected from among three members consisting of said sun gear, said carrier and said ring gear;
- an output shaft connected to and rotated by one of said three members other than said two members;
- and
- a friction member driving device operable by rotation of said output shaft, to move said friction member;
- an electric power source device for supplying power to said two electric motors;
- and
- a motor control device for controlling an amount of power to be supplied from said electric power source device to each of said two electric motors, in response to a signal received from said brake operating amount sensor.
Dependencies are inferred from the claim text.