Steering system of new energy commercial vehicle

Abstract

The invention discloses a steering system of a new energy commercial vehicle, which comprises a steering wheel, a column tube with an intermediate shaft assembly, a steering gear, a steering plumbing arm, a steering straight pull rod, a left steering knuckle, a right steering knuckle and a transverse pull rod arranged between the left steering knuckle and the right steering knuckle and further comprises a pair of connecting pull rods. The steering straight pull rod is hinged with the steering knuckle at one side. The steering knuckle on each side is hinged to the butt joint end of the transverse pull rod through a corresponding connecting pull rod, and an electric power assisting structure is arranged on the steering gear. The electric recirculating ball type steering system adopting the disconnected steering trapezoidal structure can provide larger assisting power compared with an electric gear rack type steering gear, can provide reliable steering assisting power for a vehicle with the front axle load of 1.6-3 tons, and does not need to adopt a high-price electric hydraulic pump, so that the cost of parts of the system is low, high energy consumption required by the electric hydraulic pump is avoided, and due to the absence of steering fluid, the problems of oil leakage and oil seepage do not exist; and stability and reliability are realized.

Description

technical field [0001] The invention relates to the technical field of vehicle steering, in particular to a new energy commercial vehicle steering system. Background technique [0002] The automobile steering system is a mechanism used to maintain or change the driving direction of the automobile. It controls the rotation of the steering wheel around the kingpin through the steering wheel and related steering transmission and actuators to realize the steering of the automobile. This is the most basic aspect of the automobile. steering function. There are two types of trapezoidal structures in the steering system: one is the integral trapezoidal structure, which is matched with a non-independent suspension, and is a recirculating ball steering device with an integral bridge structure; the other is a disconnected trapezoidal structure, which Paired with independent suspension, it is a rack and pinion steering gear with a sub-frame structure. There are two types of power assi...

AI Technical Summary

Problems solved by technology

[0003] At present, in the field of light-duty new energy commercial vehicles such as light trucks and light buses, there are mainly the above two steering trapezoidal structures and power assist forms. When the suspension form is determined to be independent suspension, due to the motion mechanism, only disconnected gear teeth can be selected. rack-type steering gear, but because the electric rack-and-pinion steering gear can only meet the maximum 1.6 tons of front axle load models, when the axle load exceeds this load, only the following options can be selected: image 3 The hydraulic rack and pinion steering gear shown has high cost and high energy consumption in the hydraulic system. There are many parts in the system, difficult to assemble and maintain, and there are quality problems such as oil leakage and oil leakage, and it is not environmentally friendly.

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