Air bag type intermediate supporting device for transmission shaft of commercial vehicle, assembling method and using method

Abstract

The invention provides an air bag type intermediate supporting device for a transmission shaft of a commercial vehicle, an assembling method and a using method. The air bag type intermediate supporting device comprises a rim type bearing seat. The rim type bearing seat is provided with an inner ring and an outer ring which are connected with each other; a bearing is pressed on the periphery of theinner ring; a clamping groove is formed between the outer edge of the inner ring and the outer ring; an elastic check ring is installed in the clamping groove and used for axially fixing the bearing;an annular air bag is arranged outside the outer ring; the inner side face of the annular air bag abuts against the outer ring face, and the outer side face of the annular air bag is connected with an annular combined support; and the annular combined bracket is connected with the frame. The radial rigidity of the supporting assembly is adjusted by adjusting the air pressure of the air bag, so the inherent frequency of the supporting assembly is adjusted, the resonance frequency is avoided or disturbed, and the driving comfort of the whole vehicle is improved. Meanwhile, the problem of heat dissipation of vulcanized rubber supporting is effectively solved, and the service life of the bearing is prolonged. The device is simple in structure, simple and convenient in assembly process and reliable in performance.

Description

technical field [0001] The invention relates to the technical field of commercial vehicle transmission shafts, in particular to an airbag-type intermediate support device for commercial vehicle transmission shafts, an assembly method and a use method. Background technique [0002] Long-wheelbase commercial vehicles need to arrange more than two transmission shafts to realize power transmission. The middle support device of the transmission shaft fixes the front and rear transmission shafts to the frame crossbeam, and its function is to bear the weight of the transmission shaft and buffer the shaft generated during the operation of the transmission shaft. to and radial impact. The excitation generated during the operation of the transmission shaft is transmitted to the frame through the intermediate support. If the excitation frequency is consistent with the driving system frequency, it is easy to form resonance, which will cause vibration and abnormal noise problems in the v...

AI Technical Summary

Problems solved by technology

The excitation generated during the operation of the transmission shaft is transmitted to the frame through the intermediate support. If the excitation frequency is consistent with the frequency of the driving system, it is easy to form resonance, resulting in vibration and abnormal noise of the vehicle, which affects the driving comfort of the vehicle.

[0003] At present, the intermediate support of the transmission shaft generally adopts a vulcanized rubber structure. The rubber structure is complex and diverse to achieve different cushioning effects. However, after the structure is finalized, the inherent stiffness becomes a fixed value, and its natural vibration frequency cannot be changed.

Once the first or second order frequency of the transmission shaft is close to the frequency of the intermediate support, it is easy to cause resonance, and the resonance frequency cannot be avoided by adjusting the stiffness of the intermediate support; in addition, the vulcanized rubber structure is thick and the heat dissipation performance is poor, which affects the service life of the bearing.

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