Vibration hammer adjustable eccentric moment drive assembly

Abstract

The invention relates to a vibration hammer drive assembly with eccentric torque adjustable. The vibration hammer drive assembly with eccentric torque adjustable comprises a vibration hammer shell, a main rotating shaft and an auxiliary rotating shaft, wherein the main rotating shaft and the auxiliary rotating shaft are arranged on the vibration hammer shell and are linked, the main rotating shaft is driven by a motor, the main rotating shaft and the auxiliary rotating shaft are identical in rotating speed and opposite in rotating direction and are respectively sleeved with eccentric blocks, the eccentric blocks rotate along with the shafts, the eccentric blocks comprise the first eccentric blocks distributed in the circumferential direction and the second eccentric blocks distributed in the circumferential direction, the first eccentric block of the main rotating shaft and the first eccentric block of the auxiliary rotating shaft rotate synchronously in a linkage mode, the second eccentric block of the main rotating shaft and the second eccentric block of the auxiliary rotating shaft rotate synchronously in a linkage mode, and the main rotating shaft is further provided with a distance adjustment mechanism which is used for adjusting the distance between the first eccentric block and the second eccentric block of the main rotating shaft in the circumferential direction. By the adoption of the scheme, the vibration hammer drive assembly with eccentric torque adjustable is high in starting speed, small in starting load and capable of avoiding mechanical resonance.

Description

technical field [0001] The invention relates to a vibratory hammer, in particular to an adjustable eccentric moment drive assembly of the vibratory hammer. Background technique [0002] The vibratory hammer uses an electric motor or a hydraulic motor to drive the pair of eccentric blocks to rotate in opposite directions, so that the horizontal centrifugal forces generated by them cancel each other out, while the vertical centrifugal forces are superimposed on each other. Through the high-speed rotation of the eccentric wheel, the vibratory hammer shell produces a vertical up and down motion. Vibration, so as to achieve the purpose of pile sinking. [0003] The drive assembly of a traditional vibratory hammer includes a vibratory hammer housing. The vibratory hammer housing is provided with rotating shafts driven by a motor to rotate in opposite directions. Eccentric blocks are respectively fixed on the rotating shafts. When the vibratory hammer starts, The motor needs to pr...

AI Technical Summary

Problems solved by technology

[0003] The drive assembly of a traditional vibratory hammer includes a vibratory hammer housing. The vibratory hammer housing is provided with rotating shafts that are driven by a motor to rotate in opposite directions. Eccentric blocks are fixed on the rotating shafts. When the vibratory hammer starts, The motor needs to provide enough torque to overcome the gravity and eccentric torque of the entire eccentric block on the two rotating shafts, which increases the starting load of the motor and delays the starting speed of the vibratory hammer; secondly, there is resonance between the eccentric block and the rotating shaft Frequency, the value of the frequency is affected by the shape and material, and the shape formed by the eccentric block and the rotating shaft generally does not change, causing the motor to start or shut down as the speed gradually increases or decreases, and resonance will be triggered at a certain moment Drive the vibratory hammer shell to produce severe vibration and noise, which will affect the surrounding working environment and staff, and also reduce the overall safety performance of the vibratory hammer

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