Vibrating mechanism with stepless adjustable eccentric moment

Abstract

The invention relates to a vibrating mechanism with stepless adjustable eccentric moment. At least four eccentric shafts are arranged on a box body of the vibrating mechanism, wherein half of the eccentric shafts are arranged side by side at the upper part of the box body to form an upper eccentric group, the other half of the eccentric shafts are arranged side by side at the lower part of the box body to form a lower eccentric group, all the eccentric shafts are provided with eccentric blocks and gears respectively, the gears of the upper eccentric group and the gears of the lower eccentric group are meshed with each other respectively, one eccentric shaft in the upper eccentric group is connected with a hydraulic motor, the other eccentric shaft in the upper eccentric group is provided with an upper chain wheel, one eccentric shaft in the lower eccentric group is connected with the hydraulic motor, the other eccentric shaft in the lower eccentric group is provided with a lower chain wheel, the upper chain wheel and the lower chain wheel are connected through a chain, two adjusting chain wheels are arranged between the upper and the lower eccentric groups and connected with the chain, and the two adjusting chain wheels are connected with connecting rods which are fixedly connected with a telescopic rod of a hydraulic cylinder. The invention can achieve the effect of selectively adjusting and controlling the working vibration amplitude of the engineering machine, can prolong the service life of the machine and improve the work efficiency and the work adaptability, and has a strong practicability and a wide prospect for market application.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a vibration mechanism with stepless adjustable eccentric moment. Background technique [0002] At present, in various fields that use eccentric vibration mechanisms, such as hydraulic vibratory pile hammers, impact drilling rigs, vibratory rollers, vibratory crushers and other construction machinery that require vibration operations, in order to improve work efficiency, it is necessary to select different optimal amplitudes for different working conditions. And in order to avoid damage to the machine due to resonance in the resonance area when starting and stopping, it is hoped that the eccentric torque can be adjusted. [0003] At present, various eccentric torque adjustment schemes at home and abroad generally have several forms: (1) manual adjustment, the eccentric torque is adjusted by changing the phase or weight of the eccentric block, and the adjustment must ...

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Problems solved by technology

(4) Four-axis helical spline adjustment shaft type. Two large-lead helical splines with opposite directions of rotation are manufactured on the adjustment shaft. A gear is installed on each end of the key, and one of the gears meshes with the synchronous gear below. The other gear meshes with the upper synchronous gear through the intermediate gear, and the adjustment shaft is slid axially. The lower set of eccentric blocks rotates relative to the upper set of eccentric blocks, which can also achieve the purpose of stepless frequency modulation. Very demanding, poor control, high cost

[0004] Therefore, among the various torque adjustment methods of vibratory pile hammers existing at home and abroad, some have poor adjustment ability, and some have complex mechanisms, especially in the rigid synchronous transmission mode of gears, due to the complex structure, transmission parts such as gears are easy to be damaged, resulting in stepless adjustment. Rectangular vibrating mechanism is difficult to popularize and apply so far

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