Swing arm middle-arranged-type double-axle steering system

Abstract

The invention relates to a swing arm middle-arranged-type double-axle steering system comprising a front axle steering unit, a rear axle steering unit and a longitudinal pull rod. The front axle steering unit comprises a power steering gear, a front axle swing arm, a front axle left pull rod, a front axle right pull rod, a front axle left trapezoid arm and a front axle right trapezoid arm. The rear axle steering unit comprises a follower, a rear axle swing arm, a rear axle left pull rod, a rear axle right pull rod, a rear axle left trapezoid arm and a rear axle right trapezoid arm. The power steering gear and the follower are fixed on a vehicle frame, the front axle left trapezoid arm, the front axle right trapezoid arm, the rear axle left trapezoid arm and the rear axle right trapezoid arm are fixedly connected with a front axle left steering knuckle, a front axle right steering knuckle, a rear axle left steering knuckle and a rear axle right steering knuckle correspondingly. The input end of the power steering gear is connected with a steering wheel through a steering driving shaft and an angle driver. The swing arm middle-arranged-type double-axle steering system has the advantages of being simple in structure, convenient to use, large in output torque, small in occupied space, large in turning angle and high in wheelbase adaptation and can meet the using requirement of a wheel large bouncing amount heavy chassis.

Description

technical field [0001] The invention relates to a vehicle chassis steering device, in particular to a large wheelbase double-axle steering system for a heavy vehicle chassis. Background technique [0002] In the field of vehicles, the steering system for heavy-duty chassis currently on the market mainly adopts the structure of a steering gear plus a power steering cylinder. The steering system with this structure is only suitable for non-independent suspension. If it is applied to independent suspension, it will need to increase the inter-axle longitudinal tie rod mechanism, which will increase the complexity of the structure; and this cylinder-assisted steering system is used in heavy-duty The chassis suffers from heavy steering and often requires larger cylinder sizes to increase power assist, which in turn increases space requirements. At the same time, the steering gear of this steering system is usually arranged at the front of the vehicle, and it is easy to interfere ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of the steering system with steering gear and steering cylinder in the prior art, which have complex structure, large space occupation, and small front wheel rotation angle, the present invention provides a swing arm mid-mounted double-axle steering system, which includes a front Axle steering unit, rear axle steering unit and trailing rod; the front axle steering unit includes power steering, front axle swing arm, front axle left tie rod, front axle right tie rod, front axle left trapezoidal arm and front axle right trapezoidal arm; The rear axle steering unit includes a follower, a rear axle swing arm, a rear axle left tie rod, a rear axle right tie rod, a rear axle left trapezoidal arm, and a rear axle right trapezoidal arm; The front axle swing arm and the rear axle swing arm are L-shaped structures and are arranged at intervals along the front and rear directions, and the middle corners of the front axle swing arm and the rear axle swing arm Corresponding to the connection with the power steering and the follower; the two sides of the front end of the front axle swing arm are correspondingly hinged with the inner ends of the left and right front axle tie rods, and the outer ends of the front axle left and front axle right tie rods are corresponding to the The left trapezoidal arm of the front axle is hinged with the right trapezoidal arm of the front axle; the two sides of the front end of the swing arm of the rear axle are correspondingly hinged with the inner ends of the left tie rod of the rear axle and the inner end of the right tie rod of the rear axle, and the outer ends of the left tie rod of the rear axle are corresponding with the outer ends of the right tie rod of the rear axle It is hinged with the left trapezoidal arm of the rear axle and the right trapezoidal arm of the rear axle; the front and rear ends of the longitudinal tie rod are correspondingly hinged with the rear end of the swing arm of the front axle and the rear end of the swing arm of the rear axle;

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