Hub reductor for mine electric drive heavy-duty car

Abstract

The invention is suitable for the field of mechanical transmission devices, in particular to the field of transmission devices for large-tonnage mining dump trucks with electric wheels, and provides a hub reductor for a mine electric drive heavy-duty car. The hub reductor is characterized by adopting three stages of planetary reducing mechanisms; the first-stage and the second-stage planetary reducing mechanisms are differential gear trains; the third-stage planetary reducing mechanism is an ordinary gear train; in first-stage transmission and second-stage transmission, sun gears are power input components, and planet carriers and gear rings are power output components; and in third-stage transmission, a sun gear is a power input component, a planet carrier is fixed, and a gear ring is a power output component. The invention has the benefits that the transmission ratio changes within a large range, so as to transmit even larger torque; one more stage of planetary reducing mechanism is adopted for providing driving torque required by driving the heavy duty car, so that the bending fatigue stress and the contact fatigue stress of a last stage gear are reduced, which ensures higher safety factor; and the axial space utilization rate of the whole hub reductor is improved while the radial space is fully used, so that the integral radiating area is enlarged to achieve integral thermal balance better.

Description

[0001] technical field [0002] The invention is suitable for the field of mechanical transmission devices, especially the field of transmission devices for large-tonnage electric wheel mining dump trucks. Background technique [0003] The wheel reducer is a commonly used power transmission device on vehicles or construction machinery, especially in electric wheel mine dump trucks, it is the only deceleration and torque increasing mechanism, which plays a key role in power transmission. At present, most mining vehicles use two-stage planetary reducers. Document 1 (Mining Machinery; March 2008; 38) introduces a wheel-side two-stage planetary reducer for mining vehicles, which is used in large-tonnage electric wheel mining dump trucks. In the process, there are problems such as limited variation range of transmission ratio, affecting the working performance of the motor, small transmission torque, low axial space utilization, gear bending fatigue, and insufficient safety fa...

AI Technical Summary

Problems solved by technology

At present, most mining vehicles use two-stage planetary reducers. Document 1 (Mining Machinery; March 2008; 38) introduces a wheel-side two-stage planetary reducer for mining vehicles, which is used in large-tonnage electric wheel mining dump trucks. In the process, there are problems such as limited variation range of transmission ratio, affecting the working performance of the motor, small transmission torque, low axial space utilization, gear bending fatigue, and insufficient safety factor of contact fatigue.

Images