Actuating arrangement for a parking brake of a motor vehicle and motor vehicle having the actuating arrangement

Patent metadata

Field	Value
Publication number	US-11738733-B2
Application number	US-202117536643-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Dec 1, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An actuating arrangement ( 1 ) for a parking brake of a motor vehicle, having a first actuating unit ( 5 ), for manual actuation of the parking brake, and a shaft ( 2 ) for transmitting braking forces (F 1, F 2 ) to at least one wheel brake cylinder ( 4 ) of a service brake of the motor vehicle. The first actuating unit ( 5 ) is operatively connected to the shaft ( 2 ) so that, when the first actuating unit ( 5 ) is actuated, a first braking force (F 1 ) is transmitted via the shaft ( 2 ) to the at least one wheel brake cylinder ( 4 ). The actuating arrangement ( 1 ) has a second actuating unit ( 7 ) for the controllable actuation of the parking brake. The second actuating unit ( 7 ) is operatively connected to the shaft ( 2 ) so that, when the second actuating unit ( 7 ) is actuated, a second braking force (F 2 ) is transmitted via the shaft ( 2 ) to the wheel brake cylinder ( 5 ).

First claim

The invention claimed is:

1. An actuating arrangement for a parking brake of a motor vehicle comprising:
a first actuating unit for manual actuation of the parking brake, and
a shaft for transmitting braking forces to at least one wheel brake cylinder of a service brake of the motor vehicle,
wherein the first actuating unit is operatively connected to the shaft, with the result that, when the first actuating unit is actuated, a first braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft,
a second actuating unit for the controllable actuation of the parking brake,
the second actuating unit is operatively connected to the shaft, with the result that, when the second actuating unit is actuated, a second braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft such that the actuation of the parking brake, via the second braking force, by the second actuating unit is independent of the actuation of the parking brake, via the first braking force, by the first actuating unit.

2. The actuating arrangement according to claim 1 , wherein at least the second actuating unit is designed as a fluidic actuating unit.

3. The actuating arrangement according to claim 1 , wherein the second actuating unit has a spring-loaded cylinder, the spring-loaded cylinder is coupled in terms of movement to the shaft and is fluidically connectable to a fluid system of the vehicle, and the spring-loaded cylinder is switchable from a braking position into a release position under the action of a fluid pressure.

4. The actuating arrangement according to claim 3 , wherein the second actuating unit has a first valve device, which is switchable between a basic position and at least one switching position, for controlling the fluid pressure of the spring-loaded cylinder, the first valve device is connected in terms of flow to the spring-loaded cylinder via a fluid line, a first flow path from a high-pressure side of the fluid system, in a direction of the spring-loaded cylinder, is blocked in the basic position and is released in the at least one switching position.

5. The actuating arrangement according to claim 4 , wherein the second actuating unit has a filter device, and the filter device is arranged on the high-pressure side upstream of the first valve device in terms of a flow direction.

6. The actuating arrangement according to claim 4 , wherein the second actuating unit has a pressure accumulator for storing a fluid pressure, the pressure accumulator is arranged on the high-pressure side upstream of the first valve device in terms of a flow direction, and stored fluid pressure is manually releasable in order to switch the spring-loaded cylinder from the braking position into the release position.

7. A motor vehicle having the actuating arrangement according to claim 1 .

8. The actuating arrangement according to claim 4 , wherein the second actuating unit has a non-return valve, and the non-return valve is arranged on the high-pressure side upstream of the first valve device in terms of a flow direction.

9. An actuating arrangement for a parking brake of a motor vehicle comprising:
a first actuating unit for manual actuation of the parking brake, and
a shaft for transmitting braking forces to at least one wheel brake cylinder of a service brake of the motor vehicle,
wherein the first actuating unit is operatively connected to the shaft, with the result that, when the first actuating unit is actuated, a first braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft,
a second actuating unit for the controllable actuation of the parking brake,
the second actuating unit is operatively connected to the shaft, with the result that, when the second actuating unit is actuated, a second braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft,
wherein the second actuating unit has a spring-loaded cylinder, the spring-loaded cylinder is coupled in terms of movement to the shaft and is fluidically connectable to a fluid system of the vehicle, and the spring-loaded cylinder is switchable from a braking position into a release position under the action of a fluid pressure,
wherein the second actuating unit has a first valve device, which is switchable between a basic position and at least one switching position, for controlling the fluid pressure of the spring-loaded cylinder, the first valve device is connected in terms of flow to the spring-loaded cylinder via a fluid line, a first flow path from a high-pressure side of the fluid system, in a direction of the spring-loaded cylinder, is blocked in the basic position and is released in the at least one switching position, and
wherein the second actuating unit has a second valve device, which is switchable between a basic position and at least one switching position, for releasing the spring-loaded cylinder, the second valve device is connected in terms of flow to the first valve device via a further fluid line, a second flow path from the spring-loaded cylinder via the first valve device, in a direction of a low-pressure side of the fluid system, is blocked in the basic position and is released in the switching position.

10. The actuating arrangement according to claim 9 , wherein at least one of the first and the second valve devices is designed as a continuous valve.

11. The actuating arrangement according to claim 9 , wherein at least one of the first and the second valve device is designed as a switching valve.

12. The actuating arrangement according to claim 9 , wherein the second actuating unit has a third valve device, which is switchable between a basic position and at least one switching position, for releasing the spring-loaded cylinder in an event of failure of the second valve device, the third valve device is arranged by a bypass line in parallel with the second valve device, and a third flow path from the spring-loaded cylinder, via the third valve device, in a direction of the low-pressure side is released in the basic position of the third valve device and is blocked in the switching position of the third valve device.

13. The actuating arrangement according to claim 9 , wherein the second actuating unit has a pressure detection device for detecting a fluid pressure of the spring-loaded cylinder, and at least one of the first and the second valve devices is controlled on a basis of detected fluid pressure.

14. An actuating arrangement for a parking brake of a motor vehicle comprising:
a first actuating unit for manual actuation of the parking brake,
a shaft for transmitting braking forces to at least one wheel brake cylinder of a service brake of the motor vehicle,
wherein the first actuating unit is operatively connected to the shaft, with the result that, when the first actuating unit is actuated, a first braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft,
a second actuating unit for the controllable actuation of the parking brake,
the second actuating unit is operatively connected to the shaft, with the result that, when the second actuating unit is actuated, a second braking force is transmitted to the at least one wheel brake cylinder of the service brake via the shaft, and
wherein the second actuating unit is designed to implement at least one of a hill-starting aid and an automatic parking lock.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Sagmeister Martin
• Krieg Gerhard
• Igl Stefan
• Nachbaur Daniel
• Steidle Sebastian

Classifications

• B60T17/086 Primary

  Spring loaded brake actuators with emergency release device · CPC title

• B60T17/083

  Combination of service brake actuators with spring loaded brake actuators · CPC title

• B60T2201/06

  Hill holder; Start aid systems on inclined road · CPC title

• B60T13/683 Primary

  in pneumatic systems or parts thereof (in vacuum systems B60T13/72) · CPC title

• B60T15/041

  controlling auxiliary pressure brakes, e.g. parking or emergency brakes (B60T15/048 takes precedence) · CPC title