Electronic mechanical brake
AssigneeHyundai Mobis Co., Ltd.
InventorJong Sung KIM
Life of this patent
Estimating the term…
Abstract
The present disclosure is mainly directed to simplifying a design structure of an electronic mechanical brake and reducing manufacturing costs by removing an elastic member and a friction member. In addition, the present disclosure is also mainly directed to improving the performance of a brake by changing a shape of a caliper body so that the caliper body replaces a clamping force support structure, of which a function is performed by an elastic member and a friction member, and solving a brake instability problem.
Claims9
An electronic mechanical brake including a piston which is movable forward or rearward in an axial direction and moves forward in the axial direction during a normal braking to press a friction pad provided to clamp a disc, and an actuator which provides a rotational force to move the piston, the electronic mechanical brake comprising:
- a spindle which includes a thrust bearing and a flange portion, is coupled to the piston to rotate according to the rotational force, and is configured to move the piston forward or rearward;
- and
- a caliper body which includes:
- a thrust bearing support portion in contact with the thrust bearing, a friction force transmission portion which is spaced apart from the flange portion by a gap and comes into contact with the flange portion as the gap becomes narrower according to a linear movement of the spindle;
- and
- a bending portion which is positioned on an upper end of the thrust bearing support portion and connects the thrust bearing support portion and the friction force transmission portion,
- wherein the thrust bearing support portion has a thickness which is relatively greater than a thickness of the bending portion so that the thrust bearing support portion protrudes relatively further than the bending portion in a direction toward the thrust bearing, and
- the bending portion has the thickness which is relatively smaller than the thickness of the thrust bearing support portion so that the bending portion is deformed to allow the friction force transmission portion to come into contact with the spindle so as to transmit a friction force when a parking braking force is generated.
An electronic mechanical brake including a piston which is movable forward or rearward in an axial direction and moves forward in the axial direction during a normal braking to press a friction pad provided to clamp a disc, and an actuator which provides a rotational force to move the piston, the electronic mechanical brake comprising:
- a spindle which includes a thrust bearing and a flange portion, is coupled to the piston to rotate according to the rotational force, and is configured to move the piston forward or rearward;
- a caliper body including a thrust bearing support portion which is in contact with the thrust bearing and a bending portion connected to the thrust bearing support portion and configured to be deformed according to a load received from the thrust bearing;
- and
- a pressurized member which is in contact with the bending portion and configured to press the flange portion to generate a friction force,
- wherein the thrust bearing support portion has a thickness which is relatively greater than a thickness of the bending portion so that the thrust bearing support portion protrudes relatively further than the bending portion in a direction toward the thrust bearing, and
- the bending portion has the thickness which is relatively smaller than the thickness of the thrust bearing support portion so that the bending portion is deformed to allow the pressurized member to come into contact with the spindle so as to transmit a friction force when the electronic mechanical brake generates a parking braking force.
Dependencies are inferred from the claim text.