Brake booster device for a braking system of a vehicle and a manufacturing method for a brake booster device for a braking system of a vehicle

Patent metadata

Field	Value
Publication number	US-9969376-B2
Application number	US-201314442338-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Nov 12, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A brake booster device is provided for a braking system of a vehicle having an input rod component, which may be situated relative to a brake actuation element in such a way that the input rod component is adjustable with the aid of a driver brake force exerted on the brake actuation element, and having a guide body with a bore formed therein, into which the input rod component at least partially protrudes, an initial spring being compressibly arranged between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component, and the initial spring being constrained with the aid of a captive spring mount.

First claim

What is claimed is:

1. A brake booster device for a braking system of a vehicle, comprising:
an input rod component that is attachable to a brake actuation element in such a way that the input rod component is adjustable with the aid of a driver brake force exerted on the brake actuation element;
a guide body having a bore formed therein and into which the input rod component at least partially protrudes;
an initial spring that is compressibly mounted between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component; and

a captive spring mount, with the aid of which the initial spring is constrained in such a way that an expansion of the initial spring from a partially compressed state of the initial spring is prevented with the aid of the captive spring mount;
an auxiliary spring, with the aid of which the widened intermediate section of the input rod component is supported by the inner wall of the bore in the guide body;
wherein the auxiliary spring is situated in line with the initial spring; and
wherein the auxiliary spring is situated in a recess formed in the widened intermediate section of the input rod component.

2. The brake booster device as recited in claim 1 , wherein the captive spring mount is formed from a spring housing that includes at least a first housing part and a second housing part, and wherein the first housing part is at least partially movable into the second housing part.

3. The brake booster device as recited in claim 1 , further comprising:
at least one gear component; and
a motor connected via the at least one gear component to the guide body, wherein the guide body is adjustable with the aid of a booster force applied by the motor.

4. A brake booster device for a braking system of a vehicle, comprising:
an input rod component that is attachable to a brake actuation element in such a way that the input rod component is adjustable with the aid of a driver brake force exerted on the brake actuation element;
a guide body having a bore formed therein and into which the input rod component at least partially protrudes;
an initial spring that is compressibly mounted between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component;
a captive spring mount, with the aid of which the initial spring is constrained in such a way that an expansion of the initial spring from a partially compressed state of the initial spring is prevented with the aid of the captive spring mount;
at least one gear component;
a motor connected via the at least one gear component to the guide body, wherein the guide body is adjustable with the aid of a booster force applied by the motor;
a first return spring situated between an inner wall of a housing of the brake booster device and a displaceable inner wall component of the brake booster device, the housing having an opening formed through which an output rod component protrudes; and
a second return spring situated between a widened section of the output rod component and the inner wall component.

5. The brake booster device as recited in claim 4 , further comprising:
an auxiliary spring, with the aid of which the widened intermediate section of the input rod component is supported by the inner wall of the bore in the guide body.

6. The brake booster device as recited in claim 5 , wherein the auxiliary spring is situated in line with the initial spring.

7. The brake booster device as recited in claim 5 , wherein the auxiliary spring is situated in parallel to the initial spring.

8. The brake booster device as recited in claim 7 ,
wherein at least one of the driver brake force and the booster force is at least partially transmittable to the output rod component, and wherein the output rod component is attachable to a main brake cylinder in such a way that at least one piston of the main brake cylinder is adjustable with the aid of at least one portion of at least one of the driver brake force and the booster force.

9. A manufacturing method for a brake booster device for a braking system of a vehicle, comprising:
arranging an input rod component, which is adjusted with the aid of a driver brake force exerted on a brake actuation element during an operation of the brake booster force, at least partially in a bore of a guide body;
compressibly arranging an initial spring between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component, the initial spring being constrained with the aid of a captive spring mount between the inner wall of the bore and the widened intermediate section of the input rod component in such a way that an expansion of the initial spring from a partially compressed state of the initial spring is prevented by the captive spring mount;
arranging a first return spring between an inner wall of a housing of the brake booster device and a displaceable inner wall component of the brake booster device, the housing having an opening formed through which an output rod component protrudes; and
arranging a second return spring between a widened section of the output rod component and the inner wall component.

10. A manufacturing method for a brake booster device for a braking system of a vehicle, comprising:
arranging an input rod component, which is adjusted with the aid of a driver brake force exerted on a brake actuation element during an operation of the brake booster force, at least partially in a bore of a guide body;
compressibly arranging an initial spring between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component, the initial spring being constrained with the aid of a captive spring mount between the inner wall of the bore and the widened intermediate section of the input rod component in such a way that an expansion of the initial spring from a partially compressed state of the initial spring is prevented by the captive spring mount;
arranging an auxiliary spring in a recess formed in the widened intermediate section of the input rod component, the widened intermediate section of the input rod component is supported by the inner wall of the bore in the guide body using the auxiliary spring;
wherein the auxiliary spring is situated in line with the initial spring.

11. A brake booster device for a braking system of a vehicle, comprising:
an input rod component that is attachable to a brake actuation element in such a way that the input rod component is adjustable with the aid of a driver brake force exerted on the brake actuation element;
a guide body having a bore formed therein and into which the input rod component at least partially protrudes;
an initial spring that is compressibly mounted between an inner wall of the bore in the guide body and a widened intermediate section of the input rod component; and

a captive spring mount, with the aid of which the initial spring is constrained in such a way that an expansion of the initial spring from a partially compressed state of the initial spring is prevented with the aid of the captive spring mount;
an output rod component, to which at least one of the driver brake force and the booster force at least partially transmittable, wherein the output rod component is attachable to a main brake cylinder in such a way that at least one piston of the main brake cylinder is adjustable with the aid of at least one portion of at least one of the driver brake force and the booster force;
a first return spring situated between an inner wall of a housing of the brake booster device and a displaceable inner wall component of the brake booster device, t

Assignees

• Bosch Gmbh Robert

Inventors

• Willmann Karl-Heinz
• Mayer Jochen

Classifications

• B60T13/743 Primary

  with a spring accumulator · CPC title

• B60T13/745

  acting on a hydraulic system, e.g. a master cylinder · CPC title