Electromechanical brake amplifier

Abstract

A brake amplifier having a housing; a spindle nut; a motor; two tie rods; a hook frame; and a pressure piston which can be coupled at a first end to a brake pedal and at a second end to a brake master cylinder. A return spring is assigned to the pressure piston which bears a follower element at the second end, which follower element engages the hook frame at the rear and rests on the end side of the spindle nut in a rest position by means of a distance holder passing through the hook frame such that the follower element is spaced apart from the hook frame. In the operating position, the pressure piston is moved relative to the main shaft so that the follower element is spaced from the hook frame and is spaced from the end side by means of the distance holder. An elastomer element projecting axially in the direction of the hook frame is arranged on the side of the follower element facing the hook frame, and / or an elastomer element projecting axially in the direction of the follower element is arranged on the end side of the hook frame facing the follower element.

Description

technical field [0001] The invention relates to an electromechanical brake booster for a vehicle, having a housing; a rotatably mounted spindle nut, which is operatively engaged with an axially displaceable spindle; an electric motor for rotating drive the spindle nut to move the spindle; two tie rods fastened to the housing and extending parallel to the spindle; a hook frame fastened to the spindle and slidably supported on and a pressure piston extending through the main shaft and movable relative to the main shaft, the pressure piston can be coupled with the brake pedal at the first end, and at the second end The pressure piston is coupled at both ends to the brake master cylinder, and a return spring is assigned to the pressure piston, wherein the pressure piston carries a driver element at the second end, which engages at the rear The hook bracket, and in the rest position with at least one spacer that passes through the hook bracket, rests against the end face of the sp...

AI Technical Summary

Problems solved by technology

As a result, the driver element hits the hook bracket, which can lead to a load on the hook bracket and the driver element on the one hand and undesired noise generation on the other hand.

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