Electromechanical brake actuator for disc brakes
An electromechanical brake actuator ( 2 ) includes a housing ( 1 ), a first housing part ( 3 ) configured as a housing flange for attaching the electromechanical brake actuator ( 2 ) to a disc brake ( 38 ), a second housing part ( 4 ) for receiving a drive ( 6 ), a third housing part ( 5 ) arranged between the first housing part ( 3 ) and the second housing part ( 4 ) and connected to the first housing part ( 3 ) and the second housing part ( 4 ), a motor ( 37 ), a gearbox ( 7 ), and a tappet ( 9 ) or a spindle for actuating a disc brake ( 38 ). The housing ( 1 ) is an aluminum die-cast formed part. The first housing part ( 3 ) and the second housing part ( 4 ) have planar contact surfaces ( 34, 34 a ) configured to receive plates of a two-plate die-casting machine during the forming process of the housing ( 1 ).
1. An electromechanical brake actuator ( 2 ) comprising:
a housing ( 1 ) having:
a first housing part ( 3 ) configured as a housing flange for attaching the electromechanical brake actuator ( 2 ) to a disc brake ( 38 );
a second housing part ( 4 ) for receiving a drive ( 6 ); and
a third housing part ( 5 ) arranged between the first housing part ( 3 ) and the second housing part ( 4 ) and connected to the first housing part ( 3 ) and the second housing part ( 4 );
a motor ( 37 );
a gearbox ( 7 ); and
a tappet ( 9 ) or a spindle for actuating the disc brake ( 38 );
wherein the housing ( 1 ) is an aluminum die-cast formed part;
wherein the second housing part ( 4 ) has a motor flange ( 11 ) for attaching the motor ( 37 ) on an outer side ( 10 ) of the housing ( 1 ) or wherein the second housing part ( 4 ) has a cylindrical partial region ( 36 ) for receiving a motor ( 37 ) and a motor flange ( 11 ) for attaching a motor ( 37 ); and
wherein on an inner side ( 14 ) of the housing ( 1 ), the second housing part ( 4 ) has bearing receptacles ( 15 , 15 a ) for bearings ( 16 , 16 a ) disposed axially between the motor flange ( 11 ) and the gearbox ( 7 ), wherein the bearings ( 16 , 16 a ) are configured to receive a cam disc ( 8 ).
2. The electromechanical brake actuator ( 2 ) as claimed in claim 1 , wherein the second housing part ( 4 ) has an assembly opening ( 17 ) for the cam disc ( 8 ) radially opposite from the first housing part ( 3 ) between the motor flange ( 11 ) and the gearbox ( 7 ).
3. The electromechanical brake actuator ( 2 ) as claimed in claim 2 , wherein the assembly opening ( 17 ) has recesses ( 18 , 18 a ) for receiving a machining tool and wherein the assembly opening ( 17 ) has bores ( 19 , 19 a , 19 b , 19 c ) for receiving a cover.
4. The electromechanical brake actuator ( 2 ) as claimed claim 1 , wherein the third housing part ( 5 ) defines an internal channel that guides the tappet ( 9 ) or spindle axially along the longitudinal axis (A 2 ).
5. The electromechanical brake actuator ( 2 ) as claimed in claim 1 , wherein the motor flange ( 11 ) has a central bearing point ( 12 ) starting from an axial axis (A) of the second housing part ( 4 ), and the motor flange ( 11 ) has reinforcement ribs ( 13 ) extending radially toward the outer side ( 10 ) of the housing ( 1 ) starting from the bearing point ( 12 ).
6. An electromechanical brake actuator ( 2 ) comprising:
a housing ( 1 ) having:
a first housing part ( 3 ) configured as a housing flange for attaching the electromechanical brake actuator ( 2 ) to a disc brake ( 38 );
a second housing part ( 4 ) for receiving a drive ( 6 ); and
a third housing part ( 5 ) arranged between the first housing part ( 3 ) and the second housing part ( 4 ) and connected to the first housing part ( 3 ) and the second housing part ( 4 );
a motor ( 37 );
a gearbox ( 7 ); and
a tappet ( 9 ) or a spindle for actuating the disc brake ( 38 );
wherein the housing ( 1 ) is an aluminum die-cast formed part;
wherein the third housing part ( 5 ) is cylindrical and has a guide channel ( 21 ) for guiding the tappet ( 9 ) axially along an axial axis (A 2 ) of the third housing part ( 5 ).
7. The electromechanical brake actuator ( 2 ) as claimed in claim 6 , wherein the first housing part ( 3 ) has a first planar contact surface ( 34 ) and the second housing part ( 4 ) has a second planar contact surface ( 34 a ), wherein the first and second planar contact surfaces ( 34 , 34 a ) are configured to receive plates of a two-plate die-casting machine during the forming process of the housing ( 1 ).
8. The electromechanical brake actuator ( 2 ) as claimed in claim 6 , wherein the second housing part ( 4 ) has a motor flange ( 11 ) for attaching the motor ( 37 ) on an outer side ( 10 ) of the housing ( 1 ) or wherein the second housing part ( 4 ) has a cylindrical partial region ( 36 ) for receiving a motor ( 37 ) and a motor flange ( 11 ) for attaching the motor ( 37 ).
9. The electromechanical brake actuator ( 2 ) as claimed in claim 8 , wherein the motor flange ( 11 ) has a central bearing point ( 12 ) starting from an axial axis (A) of the second housing part ( 4 ), and the motor flange ( 11 ) has reinforcement ribs ( 13 ) extending radially toward the outer side ( 10 ) of the housing ( 1 ) starting from the bearing point ( 12 ).
10. The electromechanical brake actuator ( 2 ) as claimed in claim 6 , wherein the first housing part ( 3 ) has an opening ( 22 ) for receiving and actuating the tappet ( 9 ), the opening being central with respect to an axial axis (A 3 ) of the first housing part ( 3 ).
11. The electromechanical brake actuator ( 2 ) as claimed in claim 10 , wherein an inner diameter (D 1 ) of the opening ( 22 ) corresponds to an inner diameter (D 2 ) of the guide channel ( 21 ).
12. The electromechanical brake actuator ( 2 ) as claimed in claim 6 , wherein the first housing part ( 3 ) has bores ( 24 , 24 a , 24 b , 24 c ) for attachment to the disc brake ( 38 ) axially on an outer peripheral region ( 23 ) of the first housing part ( 3 ).
13. The electromechanical brake actuator ( 2 ) as claimed claim 6 , wherein the first housing part ( 3 ) has a groove ( 31 ) for axially receiving a seal on a side facing the third housing part ( 5 ).