The embodiment of the invention provides a braking device, and belongs to the technical field of non-friction braking. The braking device includes a braking box body, a box cover, shear thickening liquid, two rotor shear rods, a
stator shear rod, a shaft and a ventilation plug; a
stator and rotors are placed inside the box body, the inside of the box body is filled with the shear thickening liquid, and the rotor shear rods and the
stator shear rod are immersed in the shear thickening liquid. The rotor shear rods are fixed to the shaft in an assembled mode. The stator shear rod is placed at theposition, between the two rotor shear rods, inside the box body and is separated from the shaft. The physical characteristics of the shear thickening liquid (non-
Newtonian fluid) are used, a reduction gearbox body is filled with shear thickening liquid, shearing is performed in the shear thickening liquid through the rotors, the
viscosity of the liquid changes under
impact, physical characterization changes from a
liquid phase to a
solid phase, at the moment, the rotation of the rotors is subjected to great resistance, and the resistance output is achieved through the shaft, the rods and other components connected to the rotors to achieve the purpose of braking. The
solid-
liquid phase transition of the shear thickening liquid is fast and reversible, so that the braking effect and the heatdissipation effect of the braking device are very good. The braking device has the characteristics such as large braking power,
high heat dissipation efficiency and high reliability, and is widely used in high-speed and high-power vehicles and industrial fields.