Automobile steer-by-wire hand feeling simulator with safety redundant structure

Abstract

The utility model relates to the technical field of automobile steer-by-wire, in particular to an automobile steer-by-wire hand feeling simulator with a safety redundant structure. The automobile steer-by-wire hand feeling simulator comprises a steering motor used for providing damping torque for a driver at a steering wheel end, an electromagnetic brake is installed on a rotating shaft of the steering motor, and the electromagnetic brake is in a power-off braking mode. The electromagnetic brake comprises a stator and a rotor, the stator is installed on an end cover where a rotating shaft in the steering motor is located, and the rotor is fixed to the rotating shaft of the steering motor. The rotor is fixedly installed on a rotating shaft of the steering motor through a rotor hub, and the rotor hub is in interference fit with the rotating shaft of the steering motor. Redundancy of damping torque is provided for a driver at the steering wheel end through the electromagnetic brake, and the structure of the steer-by-wire hand feeling simulator is greatly simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wire-controlled steering, in particular to an automobile wire-controlled steering feel simulator with a safety redundant structure. Background Art

[0002] In the wire-controlled steering system of the prior art, the feel simulator is used to provide the driver with a feel torque feedback of comprehensive information such as vehicle speed and road conditions, and the feel torque feedback provides a damping torque through the steering motor; there are generally two types of steering motors in the existing wire-controlled steering feel simulators, one is a dual-winding steering motor, the controller of the dual-winding steering motor is integrated with the dual-winding steering motor, the dual-winding steering motor has independently controlled main winding and negative winding, under normal conditions, the main winding drives the motor to provide damping torque for the driver at the steering wheel end, when the main winding fails, the negative winding can still drive the motor to generate damping torque, and the size of the dual-winding steering motor is also relatively large; the other is a structure of a main steering motor combined with a negative steering motor, and is equipped with a main steering motor controller and a negative steering motor controller Under normal conditions, the main steering motor works to provide the driver with a damping torque at the steering wheel end. When the main steering motor or the main steering motor controller fails abnormally, the negative steering motor replaces the main steering motor to provide a damping torque to achieve safety redundancy. On the one hand, the feel simulator composed of the two steering motors has a complex structure, high cost, and occupies a large space. On the other hand, when the car stops and the power is turned off, the two steering motors in the feel simulator also lose power and can no longer provide a damping torque. Since the steering wheel is decoupled from the steering device mechanism at this time, the steering wheel rotates lightly. In the case of accidentally touching the steering wheel, the steering wheel will be offset, resulting in a misalignment between the steering wheel and the wheel direction. In this case, a manual reset is required to ensure that the steering wheel reference is consistent with the wheel when the car is powered on again. Utility Model Content

[0003] The utility model aims to provide a car wire-controlled steering feel simulator with a safety redundant structure to solve the problems of the wire-controlled steering feel simulator in the prior art, such as complex structure, high cost, large space occupation, and steering wheel deviation caused by accidental touching of the steering wheel after the car is parked and powered off, resulting in inconsistency between the steering wheel and the wheel direction.

[0004] The technical solution of the utility model is: a car wire-controlled steering feel simulator with a safety redundant structure, the car wire-controlled steering feel simulator comprises a steering motor for providing a damping torque to the driver at the steering wheel section, an electromagnetic brake is installed on the rotating shaft of the steering motor, and the electromagnetic brake is a power-off brake.

[0005] Preferably, the electromagnetic brake comprises a stator and a rotor, wherein the stator is mounted on an end cover where a rotating shaft of the steering motor is located, and the rotor is fixed on the rotating shaft of the steering motor.

[0006] Preferably, the rotor is fixedly mounted on the rotating shaft of the steering motor via a rotor hub, and the rotor hub and the rotating shaft of the steering motor are interference fit.

[0007] Preferably, the electromagnetic brake further includes a control harness, and the control harness is electrically connected to a controller of the steering motor.

[0008] Preferably, the stator of the electromagnetic brake is fixedly mounted on the end cover where the rotating shaft of the steering motor is located by screws.

[0009] Preferably, the electromagnetic brake also includes a plate and an armature.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] (1) The utility model discloses a vehicle-controlled steering-by-wire feel simulator with a safety redundancy structure, wherein an electromagnetic brake is installed on the rotating shaft of the steering motor, and the electromagnetic brake is a power-off brake; when the steering motor is working normally, the electromagnetic brake does not clamp the rotating shaft of the steering motor, and the steering motor provides a damping torque for the driver at the steering wheel end; when the steering motor is abnormal, the electromagnetic brake clamps the rotating shaft of the steering motor and continuously outputs a damping torque to the steering wheel, simulating the damping feel of the steering wheel, thereby achieving the purpose of safety redundancy; in the utility model, the controller of the electromagnetic brake is integrated with the controller of the steering motor, and the combination of the electromagnetic brake and the steering motor has a smaller installation space than the structure of two steering motors in the control-by-wire steering feel simulator in the prior art, making the interior space layout more flexible and optimizing the cost; by providing the driver with a redundant damping torque at the steering wheel end through the electromagnetic brake, the structure of the control-by-wire steering feel simulator is greatly simplified.

[0012] (2) The utility model is a car wire-controlled steering feel simulator with a safety redundant structure, which can clamp the rotating shaft of the steering motor after the car is powered off, continuously provide damping torque, and prevent the steering wheel from deviating due to accidental touch, resulting in the inconsistency between the steering wheel and the wheel direction. It is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic structural diagram of a vehicle wire-controlled steering feel simulator with a safety redundant structure described in this embodiment;

[0015] Figure 2 This is a schematic diagram of the structure of an electromagnetic brake in an automotive steering-by-wire feel simulator with a safety redundant structure described in this embodiment.

[0016] Among them: 1. Plate, 2. Screws, 3. Control harness, 4. Stator, 5. Steering motor, 6. Rotating shaft. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0018] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] like Figure 1 , Figure 2 As shown, a car wire-controlled steering feel simulator with a safety redundant structure, the car wire-controlled steering feel simulator includes a steering motor 5 for providing a damping torque to the driver at the steering wheel section, and an electromagnetic brake is installed on the rotating shaft 6 of the steering motor 5, and the electromagnetic brake is a power-off brake. The electromagnetic brake includes a stator 4 and a rotor, the stator 4 is installed on the end cover of the steering motor 5 where the rotating shaft 6 is located, and the rotor is fixed on the rotating shaft 6 of the steering motor 5. The rotor is fixedly mounted on the rotating shaft 6 of the steering motor 5 through the rotor hub, and the rotor hub and the rotating shaft 6 of the steering motor 5 are interference fit. The electromagnetic brake also includes a control harness 3, and the control harness 3 is electrically connected to the controller of the steering motor 5. The stator 4 of the electromagnetic brake is fixedly mounted on the end cover of the steering motor 5 where the rotating shaft 6 is located through screws 2. The electromagnetic brake also includes a plate 1 and an armature. The electromagnetic brake is an existing device, and the detailed structure is not repeated here.

[0020] The working principle of the automobile wire-controlled steering feel simulator with a safety redundant structure in the utility model is: when the steering motor 5 is working normally, the electromagnetic brake does not clamp the rotating shaft 6 of the steering motor, and the steering motor 5 provides a damping torque for the driver at the steering wheel end; when the steering motor 5 is abnormal, the electromagnetic brake clamps the rotating shaft 6 of the steering motor 5, and continuously outputs a damping torque to the steering wheel to simulate the damping feel of the steering wheel, thereby achieving the purpose of safety redundancy; the automobile wire-controlled steering feel simulator with a safety redundant structure in the utility model can clamp the rotating shaft 6 of the steering motor 5 after the car is powered off, continuously provide a damping torque, and prevent the problem of inconsistent directions of the steering wheel and the wheel caused by steering wheel deviation caused by accidental touch, and has strong practicality.

[0021] Taking an electromagnetic brake in the prior art as an example, the working principle of an automobile wire-controlled steering feel simulator with a safety redundant structure in the utility model is further explained. The structure of this electromagnetic brake is mainly composed of a stator and a rotor, and also includes a coil, a torque spring, an armature, a rotor hub, a silencer spring, and a plate; a wound coil is placed inside the stator and epoxy-potted; the rotor is made of a specific friction-resistant material, and the friction torque between the rotor and the stator is pressurized by a circumferentially distributed torque spring, so that the armature and the plate clamp the rotor to generate a friction torque. The rotor is mounted on the rotating shaft of the steering motor through the rotor hub, and the stator is fixed on the end cover of the steering motor; when the coil is energized, magnetic flux is generated, and a closed magnetic circuit is formed between the stator 4 and the armature, and the stator overcomes the compression force of the torque spring to attract the armature, while the rotor becomes free and the rotating shaft of the steering motor is released; when the coil is not energized, the armature presses the rotor through the compressed torque spring, and the rotor is clamped between the armature and the plate, and the rotating shaft of the steering motor is braked and held by the friction force generated. In this case, a certain gap is maintained between the stator and the armature.

[0022] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A vehicle steering-by-wire feel simulator with a safety redundant structure, characterized in that: The automobile wire-controlled steering feel simulator comprises a steering motor for providing a damping torque to the driver at the steering wheel end. An electromagnetic brake is installed on the rotating shaft of the steering motor, and the electromagnetic brake is a power-off brake.

2. The vehicle steering-by-wire feel simulator with a safety redundant structure according to claim 1, characterized in that: The electromagnetic brake comprises a stator and a rotor. The stator is mounted on an end cover where a rotating shaft in a steering motor is located, and the rotor is fixed on the rotating shaft of the steering motor.

3. The vehicle steering-by-wire feel simulator with a safety redundant structure according to claim 2, characterized in that: The rotor is fixedly mounted on the rotating shaft of the steering motor through a rotor hub, and the rotor hub and the rotating shaft of the steering motor are in interference fit.

4. The vehicle steering-by-wire feel simulator with a safety redundant structure according to claim 2, characterized in that: The electromagnetic brake further includes a control harness, and the control harness is electrically connected to a controller of the steering motor.

5. The automobile steering-by-wire feel simulator with a safety redundant structure according to claim 2, characterized in that: The stator of the electromagnetic brake is fixedly mounted on the end cover where the rotating shaft of the steering motor is located by screws.

6. The automotive steering-by-wire feel simulator with a safety redundant structure according to claim 1, characterized in that: The electromagnetic brake also includes a plate and an armature.

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