Brake mechanism, brake system, and vehicle

A brake system, comprising a controller and the brake mechanism, wherein the brake mechanism comprising a fastening portion (14), a drive mechanism (13), a first piston (210), a second piston (212), and an elastic component (202), wherein

• the first piston (210) and the second piston (212) are respectively disposed on two sides of a brake disc (211), both the first piston (210) and the second piston (212) are in transmission connection to the drive mechanism (13), and the drive mechanism (13) is connected to the fastening portion (14) through the elastic component (202);
• the drive mechanism (13) is configured to:
• drive the first piston (210) to move towards the brake disc (211) in a first direction, and drive the second piston (212) to move towards the brake disc (211) in a second direction, wherein the first direction is opposite to the second direction;
• and
• the elastic component (202) is configured to:
• when the brake disc (211) is in contact with the first piston (210), drive the drive mechanism (13), the first piston (210), and the second piston (212) to move in the second direction;
• or
• the elastic component (202) is configured to:
• when the brake disc (211) is in contact with the second piston (212), drive the drive mechanism (13), the first piston (210), and the second piston (212) to move in the first direction, wherein the controller is electrically connected to the drive mechanism (13), and the controller is configured to control the drive mechanism (13) to drive the first piston (210) and the second piston (212) to approach or move away from the brake disc (211).