Electro-mechanical brake system for a vehicle
AssigneeRobert Bosch GmbH
InventorWolfram Schaffer
Life of this patent
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Abstract
An electromechanical brake for motor vehicles such as passenger vehicles, has a member that can be electromotively moved in two directions, longitudinally speaking, in order to press at least one brake lining against a friction element in an application stroke and in order to release the brake lining in a restoring stroke. In addition, a clutch is provided which can be actuated by the longitudinally movable member and which effectively disengages the longitudinally movable member from the electric drive motor when a permissible restoring stroke is exceeded. This prevents a mechanical failure or damage to the brake in the event of a malfunction of this kind.
Claims4
In a electromechanical brake (10) for motor vehicles including a member (17) that can be electromotively moved axially in two directions in order to press at least one brake lining (12) against a friction element (13) in an application stroke and in order to release the brake lining (12) in a restoring stroke and a clutch (30) which can be actuated by the axially movable member (17) and which effectively disengages the axially movable member (17) from the electric drive motor (21) when a permissible restoring stroke is exceeded, the improvement wherein:
- said clutch (30) comprises a positively engaging disc clutch having two cooperating clutch discs (31, 35) of which the first clutch disc (31) is supported so that it can move axially and can rotate in a housing (14) of the brake (10), whereas the second clutch disc (35) is disposed so that it is rotationally secured and can move axially in the housing (14),
- said axially movable member is embodied as the spindle (17) of an antilocking screw link actuator (15) connected to the first clutch disc (31) so that it is rotationally secured, and a disengaging device (43) is provided which, when engaged by the spindle (17), disengages the second clutch disc (35) from the first clutch disc (31) counter to a spring force.
Dependencies are inferred from the claim text.