Electric power steering mechanism

Abstract

The invention discloses an electric power steering mechanism which comprises an operating mechanism used for operating steering and a steering mechanism connected to wheels, and the operating mechanism is connected with the steering mechanism through an electric power steering gear. The mechanism further comprises a controller, a vehicle speed sensor and a torque sensor, wherein the vehicle speedsensor is used for detecting the rotating speed of wheels, the torque sensor is used for detecting external force torque borne by the operating mechanism, and the controller is in signal connection with the electric power-assisted steering gear, the vehicle speed sensor and the torque sensor. When the external force torque is larger than A, the electric power-assisted steering gear provides power-assisted torque for the steering mechanism, and the power-assisted torque is in negative correlation with the rotating speed of the wheels. The electric power-assisted steering gear is installed between the operating mechanism and the steering mechanism, does not occupy the space of a cab and is convenient to install and arrange. And the power-assisted torque provided by the electric power-assisted steering gear is negatively related to the rotating speed of the wheels, that is, the power-assisted value provided by the electric power-assisted steering gear is reduced along with the increase ofthe vehicle speed, so that the operation safety is ensured while the convenience in operation is ensured.

Description

technical field [0001] The present invention relates to the technical field of steering mechanisms, and more particularly, to an electric power steering mechanism. Background technique [0002] The steering used in existing vehicles includes hydraulic power steering and column-type electric power steering. The problems of hydraulic power steering are: high cost, traditional hydraulic power steering is used in pure electric vehicles, because there is no engine to drive the hydraulic pump, it needs to be equipped with a motor and a controller, and the cost is more than 1,000 yuan than electric power steering. When the power steering mechanism is installed, many components such as oil pipes, oil pots, oil pumps, motors, and controllers are needed to realize the power steering function; it is not environmentally friendly, and if the hydraulic oil leaks, it will cause pollution to the environment; high energy consumption, hydraulic power assist Steering requires the engine to dr...

AI Technical Summary

Problems solved by technology

The problems of hydraulic power steering are: high cost. Traditional hydraulic power steering is applied to pure electric vehicles. Because there is no engine to drive the hydraulic pump, an additional motor and controller are required. The cost is about 1,000 yuan more than electric power steering; When the power steering mechanism is running smoothly, it needs to install many components such as oil pipes, oil pots, oil pumps, motors, and controllers to realize the power steering function; it is not environmentally friendly, and if the hydraulic oil leaks, it will pollute the environment; high energy consumption, hydraulic power Steering requires the engine to drive the motor, which will increase the power consumption of the engine

Affected by temperature, hydraulic oil is affected by temperature, too high or too low temperature will affect the steering

The problems of the column type electric power steering are: difficult to arrange, the column type electric power steering, the power assist motor is integrated on the steering column, and the space in the cab will be occupied when it is arranged

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