Electric type power steering device

Abstract

The invention provides an electric type power steering device which belongs to the technical field of vehicles. The invention solves the problems of longer integral size, difficult distribution of the whole chassis and worse safe performance of the traditional electric type power steering device. The electric type power steering device comprises an electric steering mechanism, a sensor shaft and an upper shaft, wherein the electric steering mechanism is provided with an output shaft; the upper end of the sensor shaft is connected with the output shaft; the lower end of the sensor shaft is connected with the upper end of the upper shaft; the side part of the upper shaft is provided with a locking hole in which a locking pin can be inserted; and the output shaft is connected with the upper shaft by an axial positioning structure, and the sensor shaft and the upper shaft can rotate by the drive of the output shaft. When the axial acting force exerted by the axial positioning structure islarger than a set value, the axial positioning structure is invalid and enables the lower end part of the sensor shaft and the lower end part of the upper shaft to be axially abutted, and the lower end part of the sensor shaft at least can reach the locking hole. The invention has the advantages of compact structure, easy installation and distribution, stable and reliable working performance, long service life and high safety factor.

Description

technical field [0001] The invention belongs to the technical field of vehicles and relates to a steering device, in particular to an electric power steering device. Background technique [0002] The steering system is an extremely important part of the vehicle chassis, which not only affects safety, handling comfort and reliability, but also affects the economy of use. The steering system of the vehicle is complex in structure, involves a wide range of areas, and requires high reliability of components. It is also a difficult and technical part of the vehicle chassis design. Electric power steering device is a new type of steering device, because it saves energy, it is paid attention to by people. It uses the battery to turn the motor to generate thrust. Since the power of the engine is not directly used, the power loss of the engine is greatly reduced (the maximum loss of the hydraulic type is 5-10 horsepower), and no hydraulic pipeline is required, which is convenient f...

AI Technical Summary

Problems solved by technology

However, the above scheme still has technical problems such as complex structure, high manufacturing cost, difficulty in layout and installation, and short service life.

In addition, safety performance is difficult to be guaranteed

On the other hand, those skilled in the art have always had the need to insert a locking pin into the locking hole of the upper shaft. Therefore, when encountering a collision contraction, the front end of the sensor shaft must not reach the locking hole or exceed the locking hole, otherwise the locking hole will be damaged. Blocked, unable to achieve normal locking

The travel of the sensor shaft is shorter, and the expansion and contraction of the entire steering column is smaller.

Therefore, it is easy to cause injury to the driver in the event of a collision

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