Electromechanical brake system
AssigneeNtn Corporation
InventorMasaaki Eguchi
Life of this patent
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Abstract
An electromechanical brake system includes a linear motion mechanism configured to convert the rotation transmitted from the electric motor to a linear motion, thereby pressing a friction pad against a brake disk; a linear motion mechanism housing in which the linear motion mechanism is received as a single assembly with the components of the linear motion mechanism assembled together; and a caliper body shaped to extend across the outer periphery of the brake disk. The caliper body includes a claw portion axially supporting a friction pad; a housing-fixing plate which is arranged on the side of the linear motion mechanism housing opposite from the brake disk; and an outer shell portion through which the claw portion and the housing-fixing plate are coupled together.
Claims20
An electromechanical brake system comprising:
- an electric motor;
- two friction pads axially opposed to each other through a brake disk;
- a linear motion mechanism including
- a rotary shaft to which rotation of the electric motor is transmitted, and
- an outer ring member, the linear motion mechanism being configured to convert rotation of the rotary shaft to a linear motion of the outer ring member, thereby pressing one of the two friction pads against the brake disk;
- a linear motion mechanism housing in which the linear motion mechanism is received as a single assembly with components of the linear motion mechanism assembled together;
- and
- a caliper body shaped to extend across an outer periphery of the brake disk,
- wherein the linear motion mechanism housing includes a tubular receiving portion in which the outer ring member is axially slidably received, and an end plate disposed at one end of the tubular receiving portion, the tubular receiving portion having an inner periphery on which a cylindrical sliding surface is formed, the cylindrical sliding surface axially slidably supporting the outer ring member, wherein the end plate has a hole through which the rotary shaft is inserted,
- wherein the caliper body comprises:
- a claw portion axially supporting the other of the two friction pads;
- a housing-fixing plate which is disposed on a side of the linear motion mechanism housing which is axially farthest from the brake disk, and to which the linear motion mechanism housing is detachably fixed such that the linear motion mechanism housing is dismountable from the housing-fixing plate in a direction radially inwardly of the brake disk, wherein the housing-fixing plate has a shaft inserting hole through which the rotary shaft is inserted;
- and
- an outer shell portion which is located radially outwardly of the brake disk, and through which the claw portion and the housing-fixing plate are coupled together,
- wherein the end plate has a contact surface configured to be brought into contact with the housing-fixing plate, the contact surface being formed with a circular annular step concentric with the rotary shaft, wherein the circular annular step is fitted on an inner periphery of the shaft inserting hole, the circular annular step having an axial height smaller than an axial thickness of the housing-fixing plate.
Dependencies are inferred from the claim text.