Impeller type magneto rheological fluid brake for vehicle

A magneto-rheological fluid and brake technology, applied in the direction of liquid resistance brakes, brake types, brake actuators, etc., can solve the problem of not being able to provide a large enough braking torque, and achieve the effect of zero field follow-up loss

Inactive Publication Date: 2012-04-04
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Impeller type magneto rheological fluid brake for vehicle
  • Impeller type magneto rheological fluid brake for vehicle
  • Impeller type magneto rheological fluid brake for vehicle

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Embodiment Construction

[0010] figure 1 As shown, the present invention includes a brake housing (29 or 35), an electromagnetic device part (28 or 36) placed inside the housing, a bearing shaft (half shaft 25 or steering knuckle 31), and a bearing shaft (25 or 31) Fixedly connected brake impeller (27 or 34), a pair of tapered roller bearings (22 or 41) supporting the brake housing (29 or 35) on both sides of the impeller (27 or 34) and covering the brake housing (29 Or 35) sealing end covers (23 or 40) on both sides and auxiliary electromagnetic clutch. Both sides of the disk of the braking impeller (27 or 34) are provided with blades with rectangular cross-sections, and the blades are perpendicular to the end face of the disk and distributed radially. The magnetorheological fluid (18 or 32) works on the casing (29 or 35), the impeller (27 or 34) and the sealing ring (20 or 39) on both sides and the magnetic isolation copper sleeve (28-1 or 36-1 ), the external control circuit can pass through the ...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): F16D57/02F16D65/14
Inventor 丁柏群何永明宋宇
Owner NORTHEAST FORESTRY UNIVERSITY
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