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US 8,783,792 B2Granted
Electromechanical brake booster
AssigneeRobert Bosch GmbH
InventorsHerbert Vollert, Jochen Mayer
Life of this patent
Estimating the term…
Abstract
The invention relates to an electromechanical brake booster with an electric motor and a helical gearing. The brake booster is used for coupling an auxiliary force via a driver into a piston rod. The invention proposes connecting a spindle of the helical gearing elastically via a spring element to the piston rod such that, in the event of rapid actuation of the brake, the helical gearing and a rotor of the electric motor do not have to be accelerated entirely muscle power. The muscle power required for actuating a brake is reduced as a result in the event of a rapid actuation of the brake.
Claims19
An electromechanical brake booster, having:
- a piston rod for transmitting an actuation force from a brake pedal to a piston of a master cylinder;
- and
- an electromechanical auxiliary force generator with which an auxiliary force for boosting the actuation force can be generated, wherein a power takeoff element of the auxiliary force generator is directly connected to the piston rod by an elastic element, the elastic element configured to apply an elastic force to said power takeoff element to pull said power takeoff element toward said piston rod.
An electromechanical brake booster, having:
- a piston rod for transmitting an actuation force from a brake pedal to a piston of a master cylinder;
- an electromechanical auxiliary force generator with which an auxiliary force for boosting the actuation force can be generated, wherein a power takeoff element of the auxiliary force generator is directly connected to the piston rod by an elastic element,
- wherein the brake booster has a slaving device which transmits the auxiliary force of the auxiliary force generator to the piston rod independent of the elastic element, and
- wherein the brake booster has a damper which damps a motion of the auxiliary force generator when the damper comes into contact with the slaving device.
1 more element
An electromechanical brake booster, having:
- a piston rod for transmitting an actuation force from a brake pedal to a piston of a master cylinder;
- an electromechanical auxiliary force generator with which an auxiliary force for boosting the actuation force can be generated, wherein a power takeoff element of the auxiliary force generator is directly connected to the piston rod by an elastic element,
- wherein the elastic element is a spring element,
- wherein the brake booster has a slaving device which transmits the auxiliary force of the auxiliary force generator to the piston rod independent of the elastic element, and
- wherein the brake booster has a damper which damps a motion of the auxiliary force generator when the damper comes into contact with the slaving device.
2 more elements
An electromechanical brake booster, having:
- a piston rod for transmitting an actuation force from a brake pedal to a piston of a master cylinder;
- an electromechanical auxiliary force generator with which an auxiliary force for boosting the actuation force can be generated, the auxiliary force generator including a power takeoff element operable to transmit the auxiliary force;
- a slaving element disposed between said piston rod and said power takeoff element configured to directly transmit the auxiliary force to said piston rod only when said slaving element is in contact with said power takeoff element;
- and
- a connection element directly connected between said power takeoff element and said piston rod and configured to generate an elastic force between said power takeoff element and said piston rod to pull said power takeoff element toward said piston rod when said slaving element is not in contact with said power takeoff element.
2 more elements
An electromechanical brake booster, having:
- a piston rod for transmitting an actuation force from a brake pedal to a piston of a master cylinder;
- an electromechanical auxiliary force generator with which an auxiliary force for boosting the actuation force can be generated, the auxiliary force generator including a power takeoff element operable to transmit the auxiliary force;
- a slaving element disposed between said piston rod and said power takeoff element configured to directly transmit the auxiliary force to said piston rod only when said slaving element is in contact with said power takeoff element;
- and
- a connection element directly connected between said power takeoff element and said piston rod and configured to generate an elastic force between said power takeoff element and said piston rod when said slaving element is not in contact with said power takeoff element, and
- further comprising a damper disposed between said slaving element and said power takeoff element.
3 more elements
Dependencies are inferred from the claim text.