Heavy-load type oil-gas spring independent suspension steering drive axle

Abstract

The invention relates to a heavy-load type oil-gas spring independent suspension steering drive axle which comprises a central main reducing gear assembly, an upper cross arm, a lower cross arm, a hub reducing gear assembly, a double-rzeppa type constant velocity universal transmission shaft, a steering joint seat, an oil-gas spring and a steering rod system, wherein the central main reducing gear assembly is located in the center of the steering drive axle and fixedly connected to a frame, and structures of the heavy-load type oil-gas spring independent suspension steering drive axle at the left end and the right end of the central main reducing gear assembly are the same and symmetrically distributed. The steering joint seat is adopted, thus stress in the front, back, left and right directions of the whole steering drive axle trends to be more uniform and reasonable, the steering drive axle has higher traveling smoothness and better maneuverability, and the regulation of ground clearance can be realized at the same time of regulating the height of the frame. The upper cross arm and the lower cross arm of the heavy-load type oil-gas spring independent suspension steering drive axle are respectively of an integral structure, thereby improving the structural rigidity. Both ends of the upper cross arm and the lower cross arm are respectively connected with the steering joint seat and a main reducing gear shell through pin shafts, and the reasonable optimization of swing arm connection points ensures that the changes of wheel tracks and wheel inclination angles are the minimum when wheels jump up and down to the limit, thereby improving the controllabitity and the stability of a chassis.

Description

technical field [0001] The invention relates to an independent suspension steering drive axle, in particular to an oil-pneumatic spring independent suspension steering drive axle for multi-axis super-heavy construction machinery vehicles, and belongs to the field of mechanical technology. Background technique [0002] At present, construction machinery vehicles represented by all-terrain cranes generally adopt oil-pneumatic spring non-independent suspensions. The suspension device adopts the layout form of oil-pneumatic springs as elastic elements, thrust rods as guide devices, and integral axles as load-bearing devices. The suspension device with this structure has better ride comfort, and can also realize the adjustment of the height of the vehicle frame. However, when driving on uneven roads, the left and right wheels affect each other, and the camber angle of the wheels changes greatly, which affects the handling performance of the vehicle; and when adjusting the height ...

AI Technical Summary

Problems solved by technology

However, when driving on uneven roads, the left and right wheels affect each other, and the camber angle of the wheels changes greatly, which affects the handling performance of the vehicle; and when adjusting the height of the frame, the ground clearance cannot be adjusted

In addition, the oil and gas spring independent suspension disclosed in ZL200610164840.7 has the lower suspension point arranged on one side of the lower cross arm instead of the center of the whole bridge, which may cause uneven force and affect the stiffness of the whole bridge, thereby affecting the bearing capacity.

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