Rotary vibratory force head main shaft device

Abstract

The invention discloses a rotary vibratory force head main shaft device. Shaft necks at the upper and lower ends of a main shaft are respectively provided with upper and lower crossed roller bearing pairs, wherein the inner end surface of an inner ring of an inner crossed roller bearing in each crossed roller bearing pair is adhered to the end surfaces of the shaft necks of the main shaft, the outer end surface of an inner ring of an outer crossed roller bearing in the upper crossed roller bearing pair is locked successively by virtue of a holding loop, a hoop and a circlip for a shaft so a to be locked, and an outer ring of the outer crossed roller bearing is locked by virtue of an upper gland and a locknut; the outer ring and inner ring of the outer crossed roller bearing in the lower crossed roller bearing pair are respectively locked by virtue of a lower gland and a locknut, the outer end of the lower gland is provided with a labyrinth sealing ring, and the upper gland and the lower gland are respectively provided with an upper oil passage and a lower oil passage. The rotary vibratory force head main shaft device is high in alternating stress endurance capacity, convenient to assemble, adjust and replace, and capable of improving the working stability of a rotary vibratory force head.

Description

technical field [0001] The invention relates to the technical field of drilling machinery, in particular to the technical field of the main shaft structure of a drilling power head. Background technique [0002] Rotary vibrating head is a common component of construction equipment such as drilling. It has the function of rotation and vibration, and is widely used in foundation pile holes or large-diameter drilling construction machinery. The main shaft part is the core mechanism of the rotary vibratory head. Its lower end is connected with the drill pipe, and its upper end is connected with the reducer. It is the main force transmission or force receiving part in the drilling process. Its accuracy directly affects the drilling diameter and straightness. Its reliability directly restricts the working life of the whole machine. Due to the complexity and variability of its force, it poses new challenges to the design and research of the main shaft structure. [0003] At prese...

AI Technical Summary

Problems solved by technology

Due to the complexity and variability of its force, it poses new challenges to the design and research of the main shaft structure

[0003] At present, most manufacturers use short cylindrical roller bearings or centripetal plane bearings for the main shaft support of rotary vibratory heads, which have poor ability to withstand alternating stress and are difficult to assemble and adjust.

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