Dual-drive tunnel heading machine speed reducer

Abstract

The invention discloses a dual-drive tunnel heading machine speed reducer. The speed reducer adopts a dual-input differential motion structure and an N-W type transmission output mechanism, the input motive power is converged through a differential motion mechanism and is output to a second-stage pinion through a connecting shaft, the pinion is externally engaged with three gearwheels in circumference distribution for realizing the power transmission and flow division, the gearwheels drive the rotation of a third-stage gear through a public shaft, the gears are internally engaged with a public inner tooth ring for realizing the convergence output, during the normal work, a large motor is used for driving, a small motor is used for braking, the large motor outputs at the rated power, when over-large soil and rock resistance moment or even collapse occurs, the large motor and the small motor are simultaneously used for driving, the difficulty escaping of a tunnel heading machine is realized, and in addition, the second and third states adopt the N-W type transmission mode. The dual-drive tunnel heading machine speed reducer has the advantages that the structure is simplified, the engagement point number is reduced, the uniform load performance is improved, the advantages of great reduction ratio, small size, light weight, simple structure and the like are also realized, and the low-speed large-torque output can be realized.

Description

technical field [0001] The invention relates to a speed reducer for a tunnel boring machine, in particular to a speed reducer for a tunnel boring machine. Background technique [0002] Tunnel boring machine is the main construction machine in shield construction. Because shield construction has the advantages of safety, reliability, small environmental impact, low labor intensity, less earthwork, and high efficiency, it is widely used in urban rail, water conservancy, municipal engineering, mines, and highways. , Railway tunnels and other fields are widely used. Since the tunnel boring machine is often constructed in a complex and harsh working environment, the drive and transmission system of the tunnel boring machine are required to be able to withstand heavy loads and large impacts, and to have high power, low speed and high torque output, etc. function; and these requirements have relatively high requirements for the material, manufacturing and processing of the transmi...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the shortcomings of the existing tunnel boring machine reducer, and adopts a double-input differential structure and an N-W type transmission output mechanism. The gears are externally meshed with three large gears distributed around the circumference to realize power transmission and flow splitting. The large gears drive the third-stage gears to rotate through the common shaft, and the gears are internally meshed with the public internal ring gear to realize confluence output. During normal operation, the large motor drives and the small motor Braking, the rated power output of the large motor, when the resistance moment of the earth and rocks is too large or even collapses, the large motor and the small motor are driven at the same time to realize the escape of the tunnel boring machine, and the second and third stages adopt N-W transmission form, which simplifies the structure and reduces the The number of meshing points improves the load sharing performance. The invention also has the advantages of large reduction ratio, small volume, light weight, and simple structure, and can realize low-speed high-torque output

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