Vehicle brake apparatus
AssigneeHyundai Mobis Co., Ltd.
InventorSi Yoon Park
Life of this patent
Estimating the term…
Abstract
A vehicle brake apparatus is provided including a housing, a cylinder installed inside the housing, a motor connected to the cylinder and configured to provide a rotational force to a screw shaft installed inside the cylinder to axially rotate the screw shaft by providing the screw shaft with the rotational force of the motor, a nut coupled to the screw shaft with a ball member in between and reciprocating along an axial direction of the screw shaft in a manner that corresponds to a rotational direction of the screw shaft, a piston coupled to the nut and moving in unison with the nut, and a retaining portion installed between the nut and the piston and having an opening.
Claims20
A vehicle brake apparatus comprising:
- a housing;
- a cylinder installed inside the housing and enclosing a screw shaft;
- a motor connected to the cylinder and configured to provide a rotational force to the screw shaft;
- a nut coupled to the screw shaft with a ball member between the nut and the screw shaft, wherein the nut is configured to reciprocate along an axial direction of the screw shaft in a manner that corresponds to a rotational direction of the screw shaft;
- a piston coupled to the nut and configured to move in unison with the nut;
- and
- a retaining portion, installed between the nut and the piston, and having an opening therein,
- wherein:
- the retaining portion is a ring comprised of an elastic material, and
- the opening is located at a position in the elastic material of the ring so that the opening will narrow and the ring will shrink when the piston is coupled to the nut in a nut-and-bolt fastening manner.
Dependencies are inferred from the claim text.