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US 11,143,254 B2Granted
Electronic parking brake apparatus
AssigneeHyundai Mobis Co., Ltd.
InventorMoo Jin Choi
Life of this patent
Estimating the term…
Abstract
An EPB (Electronic Parking Brake) apparatus may include: a housing unit; a motor unit mounted in the housing unit; a worm wheel gear unit engaged and rotated with the motor unit; a piston unit connected with a brake shoe; and a nut unit mounted on the worm wheel gear unit, coupled to the piston unit, and moved by the rotation of the worm wheel gear unit so as to pressurize the piston unit. The housing unit is deformed by the movement of the piston unit and restricts the operation of the motor unit.
Claims16
An electronic parking brake apparatus, comprising:
- a housing unit;
- a motor unit mounted in the housing unit;
- a gear unit engaged and configured to be rotated with the motor unit;
- a brake shoe;
- a piston unit configured to apply pressure to the brake shoe;
- a nut unit mounted on the gear unit, coupled to the piston unit, and configured to be moved by rotation of the gear unit to pressurize the piston unit;
- and
- a stepped part,
- wherein the nut unit comprises:
- a plurality of spring parts;
- and
- a nut coupling part supporting the spring parts,
- wherein the nut coupling part is connected to the gear unit to move in an axial direction of the gear unit,
- wherein the housing unit further comprises:
- a motor mounting part covering the motor unit;
- a gear mounting part covering the gear unit;
- and
- a piston mounting part extending from the gear mounting part and covering the piston unit, and
- wherein the gear mounting part has a smaller inner diameter than an inner diameter of the piston mounting part, and the stepped part is formed between the gear mounting part and the piston mounting part, and formed by a difference in inner diameters between the gear mounting part and the piston mounting part.
16 more elements
An electronic parking brake apparatus, comprising:
- a housing unit;
- a motor unit mounted in the housing unit;
- a gear unit engaged and configured to be rotated with the motor unit;
- a brake shoe;
- a piston unit configured to apply pressure to the brake shoe;
- and
- a nut unit mounted on the gear unit, coupled to the piston unit, and configured to be moved by rotation of the gear unit to pressurize the piston unit,
- wherein:
- the nut unit comprises:
- a plurality of spring parts;
- and
- a nut coupling part supporting the spring parts;
- the nut coupling part is connected to the gear unit to move in an axial direction of the gear unit;
- and
- the motor unit further comprises:
- a motor driver, wherein the motor driver is mounted in the housing unit;
- a motor shaft, wherein the motor shaft rotates when a current is applied to the motor driver, and transmits power to the gear unit;
- and
- a first controller, wherein the first controller is configured to stop the operation of the motor driver when the current is equal to or more than a preset current value.
16 more elements
An electronic parking brake apparatus, comprising:
- a housing unit;
- a motor unit mounted in the housing unit;
- a gear unit engaged and configured to be rotated with the motor unit;
- a brake shoe;
- a piston unit configured to apply pressure to the brake shoe;
- and
- a nut unit mounted on the gear unit, coupled to the piston unit, and configured to be moved by rotation of the gear unit to pressurize the piston unit,
- wherein the nut unit comprises:
- a plurality of spring parts;
- and
- a nut coupling part supporting the spring parts,
- wherein the nut coupling part is connected to the gear unit to move in an axial direction of the gear unit, and
- wherein the piston unit further comprises:
- a piston body part, wherein the piston body part further comprises a first side and a second side, the piston body part is opened at the first side, and the nut unit is embedded inside the first side of the piston body part;
- a piston pressing part, wherein the piston pressing part is formed at the second side of the piston body part, wherein the piston pressing part presses the brake shoe;
- and
- a piston lid part, wherein the piston lid part is installed at the first side of the piston body part to prevent a separation of the nut unit.
14 more elements
An electronic parking brake apparatus, comprising:
- a housing unit;
- a motor unit mounted in the housing unit;
- a gear unit engaged and configured to be rotated with the motor unit;
- a brake shoe;
- a piston unit configured to apply pressure to the brake shoe;
- and
- a nut unit mounted on the gear unit, coupled to the piston unit, and configured to be moved by rotation of the gear unit to pressurize the piston unit,
- wherein the nut unit comprises:
- a plurality of spring parts;
- a nut coupling part supporting the spring parts;
- a pair of plate parts comprising a first plate part and a second plate part;
- and
- a nut support part supporting the first plate part,
- wherein the nut coupling part is connected to the gear unit to move in an axial direction of the gear unit,
- wherein the spring parts are disposed in and compressed between the pair of plate parts, and
- wherein the nut coupling part supports the second plate part.
13 more elements
Dependencies are inferred from the claim text.