Assembly for an electromechanical brake booster of a vehicle braking system, brake booster with such an assembly, and vehicle braking system with such an assembly

Patent metadata

Field	Value
Publication number	US-11970147-B2
Application number	US-202117218779-A
Country	US
Kind code	B2
Filing date	Mar 31, 2021
Priority date	Apr 3, 2020
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

The present disclosure concerns an assembly (100) for an electromechanical brake booster (200) of a vehicle braking system (1000). The assembly (100) comprises a housing (160) which has a longitudinal axis (L) and can be loaded with an electromechanically generated actuating force, and an output element (150) which extends away from the housing (160) and is configured for transmitting the actuating force to a brake cylinder (300) of the vehicle braking system (1000). The assembly (100) furthermore comprises an elastic element (190) which is supported on the housing (160) and configured to move the housing (160) away from the brake cylinder (300) into a starting position, and a guide (180) which is arranged on the housing (160) for the output element (150) and is configured to guide an angular deflection of the output element (150) with respect to the longitudinal axis (L) of the housing (160).

First claim

What is claimed is:

1. An assembly ( 100 ) for an electromechanical brake booster ( 200 ) of a vehicle braking system ( 1000 ), the assembly comprising:
a housing ( 160 ) which has a longitudinal axis (L) and can be loaded with an electromechanically generated actuating force;
an output element ( 150 ) extending away from the housing ( 160 ) and configured for transmitting the actuating force to a brake cylinder ( 300 ) of the vehicle braking system ( 1000 ), the output element comprising a shaft ( 152 ) and a head ( 156 ) facing the housing ( 160 ), a diameter of the shaft ( 152 ) being smaller than a diameter of the head ( 156 ), a curved transitional surface ( 154 ) of the output element ( 150 ) being arranged between the shaft ( 152 ) and the head ( 156 ) such that a diameter of the output element ( 150 ) increases steplessly from the shaft ( 152 ) to the head ( 156 );
an elastic element ( 190 ) which is supported on the housing ( 160 ) and configured to move the housing ( 160 ) away from the brake cylinder ( 300 ) into a starting position; and
a guide ( 180 ) which is arranged on the housing ( 160 ) for the output element ( 150 ) and is configured to guide an angular deflection of the output element ( 150 ) with respect to the longitudinal axis (L) of the housing ( 160 ), a portion of the guide ( 180 ) being configured to contact the curved transitional surface ( 154 ) of the output element ( 150 ) in such a manner that the output element ( 150 ) is rotatable relative to the portion of the guide ( 180 ) in contact with the curved transitional portion ( 154 ).

2. The assembly ( 100 ) as claimed in claim 1 , wherein the elastic element ( 190 ) is configured to generate a return force acting on the housing ( 160 ), wherein the guide ( 180 ) is configured to transmit the return force acting on the housing ( 160 ) to the output element ( 150 ).

3. The assembly ( 100 ) as claimed in claim 1 , wherein the housing ( 160 ) has a recess ( 166 ) in which the head ( 156 ) of the output element ( 150 ) is received at least in regions.

4. The assembly ( 100 ) as claimed in claim 3 , wherein the guide ( 180 ) at least partially forms a limit of the recess ( 166 ).

5. The assembly ( 100 ) as claimed in claim 1 , wherein the guide ( 180 ) is a separate component which is attached to the housing ( 160 ).

6. The assembly ( 100 ) as claimed in claim 5 , wherein the guide ( 180 ) is formed as a sheet metal part.

7. The assembly ( 100 ) as claimed in claim 1 , wherein the elastic element ( 190 ) is supported on a force-receiving face ( 192 ) which protrudes laterally from the housing ( 160 ).

8. The assembly ( 100 ) as claimed in claim 1 , further comprising
an actuating member ( 120 ) which can be loaded with an actuating force generated by means of a brake pedal and which extends into the housing ( 160 );
an elastically deformable transmission element ( 140 ) which is arranged to transmit force in a brake application direction between the actuating member ( 120 ) and the housing ( 160 ) on one side and the output element ( 150 ) on the other, and is configured to receive the actuating force generated by means of the brake pedal from the actuating member ( 120 ) and the electromechanically generated actuating force from the housing ( 160 ), and transmit both to the output element ( 150 ).

9. The assembly ( 100 ) as claimed in claim 8 , wherein the transmission element ( 140 ) is external to and in contact with the output element ( 150 ).

10. An electromechanical brake booster ( 200 ) for a vehicle braking system ( 1000 ), comprising
the assembly ( 100 ) as claimed in claim 1 , and
an electric motor ( 210 ) and a gear mechanism ( 220 ) for loading the housing ( 160 ) with an electromechanically generated actuating force.

11. A vehicle braking system ( 1000 ) comprising an assembly ( 100 ) as claimed in claim 1 or a brake booster ( 200 ) comprising the assembly ( 100 ) as claimed in claim 1 and an electric motor ( 210 ) and a gear mechanism ( 220 ) for loading the housing ( 160 ) with an electromechanically generated actuating force.

12. The vehicle braking system ( 1000 ) as claimed in claim 11 , which is configured to be operated in an autonomous or partially autonomous driving mode.

13. The assembly ( 100 ) as claimed in claim 1 , wherein the output element ( 150 ) rotates relative to the guide ( 180 ) as the output element ( 150 ) angularly deflects with respect to the longitudinal axis (L) of the housing.

14. The assembly ( 100 ) as claimed in claim 13 , wherein the guide ( 180 ) is elastically deformable and elastically deforms as the output element ( 150 ) rotates relative to the guide ( 180 ).

15. An assembly ( 100 ) for an electromechanical brake booster ( 200 ) of a vehicle braking system ( 1000 ), the assembly comprising:
a housing ( 160 ) which has a longitudinal axis (L) and can be loaded with an electromechanically generated actuating force;
an output element ( 150 ) extending away from the housing ( 160 ) and configured for transmitting the actuating force to a brake cylinder ( 300 ) of the vehicle braking system ( 1000 ), the output element comprising a shaft ( 152 ) and a head ( 156 ) facing the housing ( 160 ), an outer diameter of the shaft ( 152 ) being smaller than an outer diameter of the head ( 156 ), a curved transitional surface ( 154 ) of the output element ( 150 ) being arranged between the shaft ( 152 ) and the head ( 156 ) such that a diameter of the output element ( 150 ) increases steplessly from the shaft ( 152 ) to the head ( 156 );
an elastic element ( 190 ) which is supported on the housing ( 160 ) and configured to move the housing ( 160 ) away from the brake cylinder ( 300 ) into a starting position; and
a guide ( 180 ) which is arranged on the housing ( 160 ) for the output element ( 150 ) and is configured to guide an angular deflection of the output element ( 150 ) with respect to the longitudinal axis (L) of the housing ( 160 ), the guide ( 180 ) being configured to cooperate with h curved transitional surface ( 154 ) of the output element ( 150 ) in a region which, in the radial direction with respect to the longitudinal axis (L) of the housing ( 160 ), lies closer to the outer diameter of the shaft ( 152 ) than to the outer diameter of the head ( 156 ).

16. An electromechanical brake booster ( 200 ) for a vehicle braking system ( 1000 ), comprising
the assembly ( 100 ) as claimed in claim 15 , and
an electric motor ( 210 ) and a gear mechanism ( 220 ) for loading the housing ( 160 ) with the electromechanically generated actuating force.

17. An assembly ( 100 ) for an electromechanical brake booster ( 200 ) of a vehicle braking system ( 1000 ), the assembly comprising:
a housing ( 160 ) which has a longitudinal axis (L) and can be loaded with an electromechanically generated actuating force;
an output element ( 150 ) extending away from the housing ( 160 ) and configured for transmitting the actuating force to a brake cylinder ( 300 ) of the vehicle braking system ( 1000 ), the output element ( 150 ) including a shaft ( 152 ) and a head ( 156 ) facing the housing ( 160 ), a diameter of the shaft ( 152 ) being smaller than a diameter of the head ( 156 ), a curved transitional surface ( 154 ) of the output element ( 150 ) being arranged between the shaft ( 152 ) and the head ( 156 ) such that a diameter of the output element ( 150 ) increases steplessly from the shaft ( 152 ) to the head ( 156 );
an elastic element ( 190 ) which is supported on the housing ( 160 ) and configured to move the housing ( 160 ) away from the brake cylinder ( 300 ) i

Assignees

• Zf Active Safety Gmbh

Inventors

• Calvo Martinez José Manuel
• Klein Jennifer

Classifications

• B60T13/745 Primary

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

• B60T17/18

  Safety devices; Monitoring · CPC title

• B60T13/746 Primary

  and mechanical transmission of the braking action · CPC title

• B60T13/02

  with mechanical assistance or drive {(combined with fluid pressure B60T13/588)} · CPC title

• B60T13/575

  using resilient discs or pads · CPC title