Self-energizing magnetorheological fluid brake device capable of recycling brake energy

Abstract

The invention relates to a self-energizing magnetorheological fluid brake device capable of recycling brake energy. The device is characterized by comprises a drive gear, a brake disc, a driven gear, a motor, a magnetorheological device, a return spring, a connecting rod, and a wedge self-energizing device. The drive gear is fixedly connected to a wheel axle. The brake disc is fixedly connected to the wheel axle. The driven gear is fixedly connected to a driven shaft and meshed with the drive gear. The motor is rotatably connected to one end of the driven shaft through a coupler. The magnetorheological device is rotatably connected to the other end of the driven shaft. The return spring is connected between a spring seat on a vehicle body and the shell of the magnetorheological device. One end of the connecting rod is ball hinged to the shell of the magnetorheological device. The wedge self-energizing device is ball hinged to the other end of the connecting rod. The self-energizing magnetorheological fluid brake device is simple in structure, large in brake torque and widely applicable to the automobile brake field, brake energy recycling can be performed at the same time, and energy consumption can be lowered.

Description

technical field [0001] The invention relates to a vehicle braking device, in particular to a self-energizing magnetorheological fluid braking device capable of recovering braking energy. Background technique [0002] Magnetorheological fluid is a new type of intelligent material, which is a stable suspension liquid composed of ultrafine metal soft magnetic particles with high magnetic permeability and low magnetic hysteresis uniformly dispersed in a non-magnetic base fluid through a surfactant Tie. In the case of zero magnetic field, the viscosity is very low, and it appears as a free-flowing Newtonian fluid; under the action of an external magnetic field, it can be transformed into a high-viscosity, difficult-to-flow Bingham fluid within milliseconds, and this change is continuous. Instantaneous and reversible. At the same time, the shear stress of the magnetorheological fluid has a stable corresponding relationship with the magnitude of the applied magnetic field intensi...

AI Technical Summary

Problems solved by technology

Although the former can effectively increase the braking torque by increasing the number of brake discs or changing the structure of the brake disc, it also greatly increases the complexity of the brake structure, which is difficult to process and assemble, and has high requirements for the cooling system. Poor performance will have a great impact on the working performance of the magnetorheological fluid; the latter can increase the braking torque to a certain extent by squeezing the magnetorheological fluid, but the corresponding relationship between the magnitude of the squeezing force and the magnitude of the braking torque Complicated, increasing the difficulty of controlling the brakes

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