Electrically actuatable operating unit for a motor vehicle brake, brake booster having such an electrically actuatable operating unit, and motor vehicle brake system having such a brake booster

An electrically actuatable operating unit (106) for a motor vehicle brake (400), the electrically actuatable operating unit (106) comprising:

• a housing body (122) arranged so as to be displaceable in a braking direction for operation of the motor vehicle brake (400);
• a recess (150) formed in the housing body (122), the recess (150) being delimited at one longitudinal end by a contact shoulder (172);
• a through-opening (158) delimited by the contact shoulder (172);
• an operating member (124) arranged in the recess (150) so as to be displaceable for operation of the motor vehicle brake (400) and projecting through the through-opening (158) of the contact shoulder (172), the operating member (124) being arranged in a force-transmitting manner between a brake pedal and the motor vehicle brake (400);
• a resilient intermediate element (160) limiting a pulling force which acts on the operating member (124) during operation of the motor vehicle brake (400) by electrical actuation of the operating unit (106), the operating member (124) being coupled with the housing body (122) by means of the resilient intermediate element (160);
• a return spring (126) arranged in the recess (150) and configured to move the operating member (124) relative to the housing body (122) away from the contact shoulder (172);
• and
• a sleeve element (180) at least partially circumferentially surrounding a portion of the operating member (124), the sleeve element (180) being held in contact with the contact shoulder (172) by the return spring (126), the sleeve element (180) projecting into the through-opening (158) in such a manner that the sleeve element (180) is arranged between the operating member (124) and an inner circumferential surface of the contact shoulder (172) that delimits the through-opening (158).

An electrically actuatable operating unit (106) for a motor vehicle brake (400), the electrically actuatable operating unit (106) comprising:

• a housing body (122) arranged so as to be displaceable in a braking direction for operation of the motor vehicle brake (400);
• a recess (150) formed in the housing body (122), the recess (150) being delimited at one longitudinal end by a contact shoulder (172);
• a through-opening (158) delimited by the contact shoulder (172);
• an operating member (124) arranged in the recess (150) so as to be displaceable for operation of the motor vehicle brake (400) and projecting through the through-opening (158) of the contact shoulder (172), the operating member (124) being arranged in a force-transmitting manner between a brake pedal and the motor vehicle brake (400);
• a return spring (126) arranged in the recess (150) and configured to move the operating member (124) relative to the housing body (122) away from the contact shoulder (172);
• and
• a sleeve element (180) at least partially circumferentially surrounding a portion of the operating member (124) and directly contacting the operating member (124), the sleeve element (180) being held in contact with the contact shoulder (172) by the return spring (126), the sleeve element (180) projecting into the through-opening (158) in such a manner that the sleeve element (180) is arranged between the operating member (124) and an inner circumferential surface of the contact shoulder (172) that delimits the through-opening (158).