US 11,987,221 B2
Hydraulic pressure supply device of electronic brake system
Kwang Seok Hong, Seoul (KR); Jin Yeong Kim, Seongnam-si (KR); and Baik Kee Song, Seongnam-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek-si (KR)
Appl. No. 17/437,931
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Mar. 12, 2020, PCT No. PCT/KR2020/003477
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/185017, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0028340 (KR), filed on Mar. 12, 2019; application No. 10-2019-0028341 (KR), filed on Mar. 12, 2019; application No. 10-2019-0028342 (KR), filed on Mar. 12, 2019; and application No. 10-2019-0028343 (KR), filed on Mar. 12, 2019.
Prior Publication US 2022/0169225 A1, Jun. 2, 2022
Int. Cl. B60T 13/74 (2006.01); B60T 8/36 (2006.01); F16D 65/22 (2006.01); F16H 25/22 (2006.01); G01D 5/12 (2006.01); F16D 125/10 (2012.01); F16D 125/40 (2012.01)
CPC B60T 13/745 (2013.01) [B60T 8/368 (2013.01); B60T 13/746 (2013.01); F16D 65/22 (2013.01); F16H 25/2204 (2013.01); G01D 5/12 (2013.01); B60Y 2400/412 (2013.01); B60Y 2400/81 (2013.01); F16D 2125/10 (2013.01); F16D 2125/405 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic pressure supply apparatus of an electronic brake system, the hydraulic pressure supply apparatus comprising:
a motor coupled to a modulator block having a flow path and a valve for adjusting braking hydraulic pressure therein, the motor having a stator and a rotor disposed to be spaced apart from an inner circumferential surface of the stator;
a first gear configured to receive a rotational force from the rotor and rotating together with the rotor;
a second gear provided with a piston on one side thereof and concentrically connected with the first gear in a ball screw manner to convert a rotational motion of the first gear into a linear motion; and
an anti-rotation unit configured to prevent the second gear from rotating together with the first gear,
wherein
the first gear is provided as a screw shaft, and the second gear is provided as a ball nut, the first gear and the second gear converting the rotational motion into the linear motion by a ball screw manner,
the anti-rotation unit comprises:
a bush member including at least one slot formed on an inner circumferential surface thereof in a moving direction of the piston and coupled to the modulator block; and
a ring member coupled to the second gear and provided with a constraining protrusion inserted into the at least one slot,
the constraining protrusion is configured to restrict rotation of the second gear while moving along the at least one slot when the piston is operated,
a nut bearing is interposed between the bush member and the rotor, and
the bush member is configured to support an inner ring of the nut bearing, and the rotor is configured to support an outer ring of the nut bearing.