Steering system in a vehicle

• US 8,863,889 B2
• Filed: 10/23/2012
• Issued: 10/21/2014
• Est. Priority Date: 12/14/2011
• Status: Active Grant

• Current Assignee: Robert Bosch Automotive Steering GmbH (Robert Bosch GmbH)
• Original Assignee: ZF Lenksysteme GmbH (Robert Bosch GmbH)
• Inventors: Walz, Stefan, Poetzl, Thomas, Lachenmaier, Armin
• Primary Examiner(s): Hurley, Kevin
• Assistant Examiner(s): STABLEY, MICHAEL R
• Application Number:
  US13/658,241
• Publication Number:
  US 20130153327A1
• Time in Patent Office: 728 Days
• Field of Search: 180/444, 180/443
• US Class Current: 180/444
• CPC Class Codes: B62D 5/0403 characterised by constructional features, e.g. common housing for motor and gear box
• CPC Class Codes: B62D 5/0406 including housing for electronic control unit
• CPC Class Codes: F16J 15/164 the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid

Abstract

A steering system in a vehicle comprises an electrical servo motor for generating a supporting servo torque, wherein the motor shaft of the servo motor is coupled to a motion-transmitting component of the steering system. A water protection shield enclosing the motor shaft is disposed between the motor housing of the servo motor and the motion-transmitting component.

Claims

1. A steering system in a vehicle, comprising:

an electrical servo motor for generating a supporting servo torque, a motor shaft of the servo motor being coupled to a motion-transmitting component of the steering system, and

a water protection shield enclosing the motor shaft is disposed between a motor housing of the servo motor and the motion-transmitting component; and

wherein the water protection shield covers at least one venting bore in the motor housing.

2. A steering system according to claim 1, wherein a control electronics unit for controlling the servo motor is disposed on the motor housing.

3. The steering system according to claim 2, wherein the control electronics unit is disposed on the side of the motor housing facing away from the water protection shield.

4. A steering system according to claim 1, wherein the motor shaft is coupled to a component of the steering system via a transmission belt.

5. A steering system according to claim 1, wherein at least one component of the water protection shield is designed as a plastic part.

6. A steering system according to claim 1, wherein at least one component of the water protection shield is designed as a sheet metal part.

7. A steering system in a vehicle, comprising:

an electrical servo motor for generating a supporting servo torque, a motor shaft of the servo motor being coupled to a motion-transmitting component of the steering system; and

a water protection shield enclosing the motor shaft is disposed between a motor housing of the servo motor and the motion-transmitting component; and

wherein at least one component of the water protection shield is disposed non-rotatably on the motor shaft;

wherein at least one component of the water protection shield is rigidly connected to the motor shaft;

wherein the components of the water protection shield on the motor shaft or on the motor housing cooperate in a manner of a labyrinth seal; and

wherein the water protection shield covers at least one venting bore in the motor housing.