Coaxial bidirectional drill bit of stable roadbed mixing pile machine

Abstract

The invention relates to roadbed stirring equipment, in particular to a coaxial bidirectional drill bit of a stable roadbed stirring pile machine. The coaxial bidirectional drill bit comprises a conical threaded mud breaker, an inner hollow transmission shaft is fixedly connected to the upper end of the conical threaded mud breaker, a first blade is fixedly mounted on the outer side of the lower end of the inner hollow transmission shaft, a driving gear is fixedly mounted on the outer side of the upper part of the inner hollow transmission shaft, the outer side of the lower portion of the inner hollow transmission shaft is movably sleeved with a positioning shaft sleeve, and a cross shaft gear is fixedly installed on the outer side of the upper end of the positioning shaft sleeve. The lower end of a driven gear is connected with the inner side of a box body, and a third blade is fixedly installed on the outer side of the box body, so that the box drives the blade to carry out rotary crushing in the direction opposite to the conical threaded mud breaker, and the effect of improving roadbed soil crushing efficiency and crushing quality is achieved; and meshing teeth on the outer sides of a driving gear, a transition gear and a driven gear are inclined spiral gear teeth, so that the meshing force, the wear resistance, the anti-seismic effect and the mute effect of bevel gears compared with straight teeth can be improved.

Description

technical field [0001] The invention relates to the field of roadbed mixing equipment, in particular to a coaxial two-way drill bit for a stable roadbed stirring pile machine. Background technique [0002] Subgrade, the structure directly supporting the track formed by filling or excavation, is also called the substructure of the line. The subgrade is connected with bridges and tunnels to form a line together. There are two basic types of subgrade according to its terrain conditions: embankment and cutting, commonly known as filling and excavation. Subgrade is a relatively loosely connected structure with weak resistance to dynamic loads. The materials used to build the subgrade, whether filled or excavated, are mainly soil-rock bulk materials, so the subgrade is a geotechnical structure that is often attacked and damaged by changes in natural conditions such as geology, water, rainfall, climate, and earthquakes, and has poor resistance. Therefore, the subgrade should have...

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Problems solved by technology

[0003] The existing subgrade soil needs to be crushed before it can be used, but most of the existing subgrade soil crushing devices can only be crushed in one direction, so that the crushing efficiency is limited and the crushing quality is poor, and the existing subgrade soil is crushed. The addition is poured from above, and cannot be directly introduced into the interior of the roadbed soil, further reducing the processing efficiency of the roadbed soil

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