Drivetrain for a vehicle

Patent metadata

Field	Value
Publication number	US-12157442-B2
Application number	US-201916445643-A
Country	US
Kind code	B2
Filing date	Jun 19, 2019
Priority date	Jun 20, 2018
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A drivetrain for a vehicle includes a drive motor, an axle differential, and a friction brake. The drive motor is configured to drive the axle differential. The friction brake is positioned in a transmission path between the drive motor and the axle differential, and is configured to generate a braking torque.

First claim

What is claimed is:

1. A drivetrain for a vehicle, comprising:
an axle differential;
a drive motor configured to drive the axle differential; and
a friction brake positioned in a transmission path between the drive motor and the axle differential, and configured to generate an adjustable braking torque that acts within the drivetrain, wherein either:
(i) the drivetrain further comprises an actuator operable to adjust a maximum level of the braking torque generated by full actuation of the friction brake; or (ii) the friction brake is configured such that the maximum level of the braking torque generated by full actuation of the friction brake is manually adjustable.

2. The drivetrain of claim 1 , further comprising:
a transmission positioned downstream of the drive motor, wherein the friction brake is positioned either upstream or downstream of the transmission.

3. The drivetrain of claim 1 , wherein the drive motor is an electric motor.

4. The drivetrain of claim 1 , wherein the drive motor is an internal combustion engine.

5. The drivetrain of claim 1 , wherein the friction brake is adjustable between (i) a functional position that enables a maximum braking torque and (ii) a reduction position that enables a reduced braking torque or no braking torque.

6. The drivetrain of claim 5 , further comprising the actuator, wherein:
the actuator is assigned to the friction brake for adjustment between the functional position and the reduced position.

7. The drivetrain of claim 1 , wherein the friction brake is operable as a parking brake and is configured to fix the vehicle at a standstill.

8. The drivetrain of claim 1 , wherein the friction brake includes a separate friction brake housing.

9. A vehicle, comprising:
a drivetrain, including:
an axle differential;
a drive motor configured to drive the axle differential; and
a friction brake positioned in a transmission path between the drive motor and the axle differential, and configured to generate an adjustable braking torque that acts within the drivetrain, wherein the friction brake is adjustable between (i) a functional position that enables a maximum braking torque upon actuation and (ii) a reduction position that enables a reduced braking torque or no braking torque upon actuation.

10. The vehicle of claim 9 , further comprising:
wheel brakes positioned in the drivetrain in addition to the friction brake.

11. The vehicle of claim 9 , the friction brake comprising:
a brake band movable between a first brake band position from which a first maximum braking torque of the adjustable braking torque is applied to a shaft of the transmission path upon actuation of the brake band, and a second brake band position from which a second maximum braking torque of the adjustable braking torque is applied to the shaft of the transmission path upon actuation of the brake band, wherein the first maximum braking torque is greater than the second maximum braking torque.

12. The vehicle of claim 11 , further comprising:
a bearing movable between a first bearing position and a second bearing position, wherein positioning the bearing at the first bearing position positions the brake band at the first brake band position, and positioning the bearing at the second bearing position positions the brake band at the second brake band position.

13. The vehicle of claim 12 , further comprising:
a guide configured to guide the bearing between the first bearing position and the second bearing position.

14. The drivetrain of claim 1 , the friction brake comprising:
a brake band movable between a first brake band position from which a first maximum braking torque of the adjustable braking torque is applied to a shaft of the transmission path upon actuation of the brake band, and a second brake band position from which a second maximum braking torque of the adjustable braking torque is applied to the shaft of the transmission path upon actuation of the brake band, wherein the first maximum braking torque is greater than the second maximum braking torque.

15. The drivetrain of claim 14 , further comprising:
a bearing movable between a first bearing position and a second bearing position, wherein positioning the bearing at the first bearing position positions the brake band at the first brake band position, and positioning the bearing at the second bearing position positions the brake band at the second brake band position.

16. The drivetrain of claim 15 , further comprising:
a guide configured to guide the bearing between the first bearing position and the second bearing position.

Assignees

• Bosch Gmbh Robert

Inventors

• Baehrle-Miller Frank
• Wienken Hubertus

Classifications

• F16D49/08

  shaped as an encircling band extending over approximately 360 degrees · CPC title

• F16D65/16

  arranged in or on the brake · CPC title

• B60Y2400/424

  Friction clutches · CPC title

• B60Y2400/74

  Shaft brakes, e.g. input shaft brakes · CPC title

• B60K2001/001

  one motor mounted on a propulsion axle for rotating right and left wheels of this axle · CPC title