Impeller type magneto rheological fluid brake for vehicle

Abstract

The invention discloses an impeller magneto rheological fluid brake for a vehicle. The fluid brake consists of a shell, a braking impeller, an electromagnetic device, a bearing shaft, a conical roller bearing, a sealing ring, an end cover and an auxiliary electromagnetic clutch, wherein the electromagnetic device comprises a magnet exciting coil and a magnet insulating copper sleeve; a half shaft on a driving wheel or a steering joint on a non-driving wheel can be taken as the bearing shaft; blades with rectangular sections are distributed on the peripheries of both sides of a disk of the braking impeller; the auxiliary electromagnetic clutch consists of a driving disk, a driven disk and a middle disk which consists of two branch disks transversely crossing the brake shell; the two branch disks are connected through a guide shaft, and form a conjugate friction pair together with the driving and driven disks of the clutch; and the closing and opening states of the conjugate friction pair are controlled by using the resultant force of the pre-tightening force of pre-tightening spring groups on both sides of the shell and the electromagnetic force of the clutch, so that zero-field loss of a magneto rheological fluid can be effectively avoided by using the brake during normal running of the vehicle, the real-time, active and continuous ABS (Antilock Brake System) braking process of the vehicle can be realized during braking, and a braking control process with higher performance than that of a hydraulic mechanical braking system is realized on a low-adhesion road surface.

Description

Technical field [0001] The invention relates to an in-wheel brake for a vehicle, in particular to an impeller type magneto-rheological fluid brake which realizes normal braking of a vehicle by working in combination with an auxiliary electromagnetic clutch. Background technique [0002] Magneto-rheological fluid is a new kind of smart material. Under the action of an external magnetic field, it can realize continuous reversible rheology between low-viscosity easy-flowing Newtonian fluid and high-viscosity hard-flowing plastic Bingham fluid in a very short time. thereby changing the shear force. This characteristic of magnetorheological fluid is used in many fields such as aerospace, mechanical instrumentation, petrochemical industry and transportation, and is considered to be a new key technology to realize the integration of electromechanical and hydraulic. [0003] Magneto-rheological fluids can also be used to design vehicle brakes, especially brakes that can continuousl...

AI Technical Summary

Problems solved by technology

However, magnetorheological fluid brakes like the above generally work in a single shear mode. When applied to automobile braking, due to the limitation of the space in the vehicle wheel, the structural size of the magnetorheological fluid brake is restricted. Often can not provide enough braking torque

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