Magnetorheological-fluid-based planetary-gear-type differential mechanism with self-locking function

Abstract

The invention discloses a magnetorheological-fluid-based planetary-gear-type differential mechanism with a self-locking function. The magnetorheological-fluid-based planetary-gear-type differential mechanism with the self-locking function comprises a first shell; two half axle gears are arranged in the first shell in a relatively-rotatable mode; four planetary gears are meshed with the two half axle gears at intervals; four magnetorheological device sets are detachably and fixedly connected with the four planetary gears respectively; the magnetorheological device sets comprise second shells which are detachably arranged at the outer side of the first shell; inner cavities of magneto-rheological devices are fixed into the second shells in a sealed mode, and multiple first damping discs are arranged in the inner cavities of the magneto-rheological devices in parallel at intervals; one end of an output shaft of each magnetorheological device is rotatably arranged in the inner cavity of each magnetorheological device, the other end of the output shaft of each magnetorheological device is detachably fixed onto one corresponding planetary gear, and multiple corresponding second damping discs which are parallel to the multiple corresponding first damping discs at intervals are arranged at one end of the output shaft of each magnetorheological device; and magnet exciting coils are arranged between the inner cavities of the magneto-rheological devices and the second shells, and are connected with a power source. The magnetorheological-fluid-based planetary-gear-type differential mechanism with the self-locking function has the characteristic of magnetorheological-fluid-based differential mechanism self-locking.

Description

technical field [0001] The invention relates to the technical field of automobile transmission, and more specifically, the invention relates to a magneto-rheological fluid-based planetary gear differential with self-locking function. Background technique [0002] In automobile-based machinery, since the distance traveled by the inner and outer wheels of this type of machinery is different when cornering, the driving wheels need a differential to perform differential speed and transmit torque at the same time to ensure that the driving wheels on both sides are purely rolling. , thereby reducing tire wear and improving transmission efficiency. [0003] Ordinary planetary gear differentials perform differential speed through the torque of the two connected wheels. In special cases, the differential needs to be self-locking to get out of trouble. The principle is: by locking the planetary gears, the planetary gears cannot rotate relative to the gear frame, so that the rotationa...

AI Technical Summary

Problems solved by technology

Nowadays, differentials with limited slip function are commonly used to realize self-locking. This type of differential is usually of viscous coupling type and mechanical friction plate type. The viscous coupling type uses the viscosity of the liquid or the shearing effect of the oil film to lock. The working temperature and failure temperature of the liquid have a great influence on its mechanical properties. The mechanical friction plate locks through the friction generated when the friction plates slide relative to each other. The working process often involves a lot of wear and friction heat. All of the above It will affect the working stability of the differential, and the structure of the above-mentioned differential is complicated, the processing requirements are high, and the cost is high

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