Integrated brake multi-stage reduction drive

Abstract

The invention discloses an integrated brake multi-stage speed reduction transmission device which comprises a bearing disc, a brake, a wheel hub, a transmission shaft and a speed reduction mechanism. The bearing disc is a T-shaped revolved body with the middle provided with a through hole, the transmission shaft is arranged in the through hole of the bearing disc in a penetrating manner, the brake is fixedly installed at the left end of the bearing disc through a bolt, and the power output end of the brake is connected with the transmission shaft through a spline; and the wheel hub is of a round shell structure with the two ends being open, one end of the wheel hub is arranged on the outer side of the horizontal part of the bearing disc in a sleeved manner and is supported by means of two bearings and a floating oil seal, the middle of the transmission shaft is arranged in an inner hole of the bearing disc in a supported manner by means of the bearings, the middle of the transmission shaft is fixedly connected with the power input end of the speed reduction mechanism, and the power output end of the speed reduction mechanism is fixedly connected with the wheel hub. The three-stage planetary gear reduction mechanism is adopted for speed reduction, and the transmission ratio is increased while structure layout is more flexible and compact; and parts are designed in a modular manner, universality is improved, the manufacturing difficulty and production cost are effectively lowered, and reliability is improved.

Description

technical field [0001] The invention relates to the technical field of crawler engineering vehicle transmission with hydrostatic transmission, in particular to an integrated braking multi-stage reduction transmission device. Background technique [0002] For traditional mechanical transmission or hydromechanical transmission system tracked engineering vehicles, due to the low engine speed, long transmission line, and small final drive deceleration ratio, two-stage spur gear reduction, two-stage planetary gear reduction or one-stage spur gear reduction are generally used. Adding a two-stage reduction mechanism in the form of a planetary system can meet the requirements. With the application of hydrostatic transmission on tracked engineering vehicles, due to the limitation of hydraulic technology, high-speed motors are mostly used for hydraulic drive, and the final reduction speed ratio is increased to about three times of the original. Due to the limitation of space structure...

AI Technical Summary

Problems solved by technology

With the application of hydrostatic transmission on tracked engineering vehicles, due to the limitation of hydraulic technology, high-speed motors are mostly used for hydraulic drive, and the final reduction speed ratio is increased by about three times. Due to the limitation of space structure, the traditional two It is difficult to realize the multi-stage reduction mechanism, and the current planetary gear transmission reducer matched with the motor adopts the transmission mode of the sun gear input ring gear output, although the structure is compact, it also correspondingly increases the manufacturing difficulty and strength requirements of the key ring gear. It is suitable for the low-speed and high-torque operating conditions of tracked engineering vehicles. However, the brakes integrated with the reducer generally have poor heat dissipation, and the separation of the friction plate and the dual plate is not complete. During the high-speed driving of the vehicle, it will cause heat. Rapid accumulation in a short period of time, and then the friction plate is burned, the brake fails, and the reliability is difficult to guarantee

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