Electric wheelchair hub motor

Abstract

The invention discloses an electric wheelchair hub motor. The electric wheelchair hub motor comprises a macro-axis fixed with a wheelchair support, a hub body assembled on the macro-axis in a rotatingmode as well as a motor body and a planetary reducing mechanism which are arranged in the hub body, wherein the motor body comprises a motor shell fixed with the macro-axis, a stator and a rotor which are arranged in the motor shell as well as an output rotating shaft which is fixed with the rotor and extends out of the motor shell, and the output rotating shaft is in transmission connection withan inner gear ring arranged on the inner wall of the hub body through the planetary reducing mechanism; the electric wheelchair hub motor also comprises a built-in electromagnetic braking device, thedevice comprises an armature disk, a first friction disk and a second friction disk which are sequentially arranged between the inner end of the macro-axis and the motor shell along an axial direction, the first friction disk is a non-metallic friction disk and is fixed on the output rotating shaft, and the second friction disk is fixed with the motor shell; and the electric wheelchair hub motoralso comprises a braking coil which is arranged at the inner end of the macro-axis and is in electromagnetic attraction with the armature disk and an elastic mechanism of which the elasticity direction is opposite to the electromagnetic attraction direction. The electric wheelchair hub motor disclosed by the invention is compact in volume, high in working efficiency and capable of realizing efficient braking.

Description

technical field [0001] The invention relates to a wheel hub motor of an electric wheelchair. Background technique [0002] At present, the driving device of conventional electric wheelchairs mostly uses a brushed DC motor to drive the wheel shaft to rotate through the shaft transmission mechanism. The disadvantage of this device is that it is large in size, heavy in weight, low in efficiency and bloated when installed on the wheelchair. On the other hand, for the consideration of driving safety, the braking part of the electric wheelchair is usually not equipped with a mechanical hand brake, but a special electromagnetic brake is used. This electromagnetic brake is usually assembled on the shaft transmission mechanism, which further increases the volume and weight of the device. [0003] The hub motor is currently a widely used driving component on electric bicycles, and has the advantages of large reduction ratio and small size. This type of motor also tends to be designe...

AI Technical Summary

Problems solved by technology

This type of motor also tends to be designed and applied to electric wheelchairs, but encounters the following technical problems: the hub motors on electric bicycles usually use a clutch and cooperate with a mechanical brake mechanism to achieve braking, bu

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