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US 12,729,733 B2Granted
Actuator for vehicle brake
AssigneeHyundai Mobis Co., Ltd.
InventorByeong Jun Oh
Life of this patent
Estimating the term…
Abstract
An actuator for a vehicle brake includes a first worm shaft connected to a motor and disposed within a housing, a first worm wheel disposed within the housing, engaged with the first worm shaft, and rotated in conjunction with the rotation of the first worm shaft, a second worm shaft including a second worm shaft body disposed within the housing and connected to the first worm wheel and a plurality of second worm shaft gear teeth disposed on the outer circumference of the second worm shaft body in a way to be spaced apart from each other, and a second worm wheel engaged with the second worm shaft and configured to deliver electric power to a piston part that pressurizes or releases a brake.
Claims16
An actuator for a vehicle brake, comprising:
- a housing;
- a first worm shaft connected to a motor and disposed within the housing;
- a first worm wheel disposed within the housing, engaged with the first worm shaft, and rotated in conjunction with a rotation of the first worm shaft;
- a second worm shaft comprising:
- a second worm shaft body disposed within the housing and connected to the first worm wheel, and
- a plurality of second worm shaft gear teeth disposed on an outer circumference of the second worm shaft body in a way to be spaced apart from each other, the plurality of second worm shaft gear teeth comprising:
- second worm shaft enveloping gear teeth, each having an external diameter that is increased from a worm shaft central part of the second worm shaft body toward a first end of the second worm shaft body, and
- second worm shaft cylindrical gear teeth, each having a constant external diameter from the worm shaft central part to a second end of the second worm shaft body,
- wherein the first end of the second worm shaft body and the second end of the second worm shaft body oppose each other in a longitudinal axis of the second worm shaft body, and
- wherein a portion of the second worm shaft including the second worm shaft enveloping gear teeth has a shape of a globoid worm shaft;
- and
- a single second worm wheel, wherein the second worm wheel is engaged with the second worm shaft and configured to deliver electric power to a piston part that pressurizes or releases a brake,
- wherein the second worm wheel comprises:
- a second worm wheel body rotatably installed in the housing;
- and
- a plurality of second worm wheel gear teeth disposed along an outer circumference of the second worm wheel body in a way to be spaced apart from each other, the plurality of second worm wheel gear teeth comprising:
- a second worm wheel enveloping gear tooth comprising a second worm wheel inclined part having a protrusion height increased from a central part of a second worm wheel gear tooth among the plurality of second worm wheel gear teeth toward a first end of the second worm wheel gear tooth, and
- a second worm wheel cylindrical gear tooth having a constant protrusion height from the central part to a second end of the second worm wheel gear tooth,
- wherein, when the second worm wheel rotates in a direction in which braking power is generated, the second worm shaft enveloping gear teeth are disposed on the second worm shaft body on a side in which a force is applied to the second worm wheel and closer to the second worm wheel, and the second worm shaft cylindrical gear teeth are disposed on an opposite side of the second worm shaft body.
16 more elements
An actuator for a vehicle brake, comprising:
- a housing;
- a first worm shaft connected to a motor and disposed within the housing;
- a first worm wheel disposed within the housing, engaged with the first worm shaft, and rotated in conjunction with a rotation of the first worm shaft;
- a second worm shaft comprising:
- a second worm shaft body disposed within the housing and connected to the first worm wheel, and
- a plurality of second worm shaft gear teeth disposed on an outer circumference of the second worm shaft body in a way to be spaced apart from each other, the plurality of second worm shaft gear teeth comprising:
- second worm shaft enveloping gear teeth, each having an external diameter that is increased from a worm shaft central part of the second worm shaft body toward a first end of the second worm shaft body, and
- second worm shaft cylindrical gear teeth, each having a constant external diameter from the worm shaft central part to a second end which is a side opposite to the first end in a longitudinal axis of the second worm shaft body, and
- wherein a portion of the second worm shaft including the second worm shaft enveloping gear teeth has a shape of a globoid worm shaft;
- and
- a single second worm wheel, wherein the second worm wheel is engaged with the second worm shaft and configured to deliver electric power to a piston part that pressurizes or releases a brake,
- wherein the second worm wheel comprises:
- a second worm wheel body rotatably installed in the housing;
- and
- a plurality of second worm wheel gear teeth disposed along an outer circumference of the second worm wheel body in a way to be spaced apart from each other, the plurality of second worm wheel gear teeth comprising:
- a second worm wheel enveloping gear tooth comprising a second worm wheel inclined part having a protrusion height increased from a central part of second worm wheel gear tooth among the plurality of second worm wheel gear teeth toward a first end of the second worm wheel gear tooth, and
- a second worm wheel cylindrical gear tooth having a constant protrusion height from the central part to a second end of the second worm wheel gear tooth,
- wherein, when the second worm wheel rotates in a direction in which braking power is generated, the second worm shaft enveloping gear teeth are disposed on the second worm shaft body on a side in which a force is applied to the second worm wheel and closer to the second worm wheel, and the second worm shaft cylindrical gear teeth are disposed on an opposite side of the second worm shaft body.
15 more elements
Dependencies are inferred from the claim text.