Direct-current brushless driving wheel structure of electric wheelchair

Abstract

The invention provides a direct-current brushless driving wheel structure of an electric wheelchair and belongs to an article for daily use of people. The direct-current brushless driving wheel structure comprises tires, a motor, a speed reducing mechanism, a wheel hub driving disc and a power-losing braking mechanism, and is characterized in that the motor comprises a stator shell, a stator winding, a rotor and a rotor shaft, wherein the stator shell is provided with a stator winding cavity, and a stator winding is arranged in the stator winding cavity; the rotor is arranged in a rotor containing cavity of the stator winding; a rotor shaft hole is formed at the center of the rotor; the rotor shaft is arranged on the rotor in a penetrating manner; one end of the rotor shaft is connected with the speed reducing mechanism, and the other end of the rotor shaft is matched with the power-losing braking mechanism; the speed reducing mechanism comprises a box body of a speed reducing box, a first-grade planetary speed reducing device and a second-grade planetary speed reducing device; the box body of the speed reducing box is fixed with the stator shell; the first-grade planetary speed reducing device is matched with one end of the rotor shaft; and the second-grade planetary speed reducing device is matched with the first-grade planetary speed reducing device and the wheel hub driving disc. The direct-current brushless driving wheel structure disclosed by the invention is high in transmission efficiency, good in energy-saving effect, high in operation efficiency, simple in structure, convenient to manufacture and assembly, convenient to maintain and flexible to use.

Description

technical field [0001] The invention belongs to the technical field of daily necessities for human beings, and in particular relates to a DC brushless driving wheel structure of an electric wheelchair. Background technique [0002] Electric wheelchairs, also known as electric wheelchairs, are transportation tools for special groups such as the disabled, elderly and infirm, and medical and clinical rehabilitation patients. There is also a lot of technical information about electric wheelchairs in published Chinese patent documents, such as Authorized announcement number CN2745544Y recommends "multifunctional electric wheelchair" (four-wheel structure), CN201379725Y provides "obstacle avoidance electric wheelchair", CN101589979B introduces "multifunctional electric wheelchair" and CN201684098U discloses "electric wheelchair", etc. Wait. [0003] Not limited to the power part of the driving wheel of the electric wheelchair listed above usually includes a motor, a reduction bo...

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Problems solved by technology

[0003] Not limited to the power part of the driving wheel of the electric wheelchair listed above usually includes a motor, a reduction box that is a reduction mechanism and a power-off braking mechanism. Since the motor is a high-speed DC brush motor, the carbon brush is easy to wear and has a short service life, and The operating efficiency is about 60-70%, and the energy loss is relatively large; the reduction mechanism is composed of a worm gear and a spur gear reducer, and the operating efficiency is also about 60-70%; the power-off brake mechanism is a power-off brake Although it has the characteristics of releasing when energized and braking when deenergized, it is not convenient to release the braking state when manually pushing in the deenergized state, which causes inconvenience in use.

[0004] At present, manufacturers of electric wheelchairs generally use the technical means of increasing the power of the motor to compensate for the aforementioned power loss, but practice has proved that this is a superficial measure rather than a permanent solution, because increasing the power of the motor can meet the needs of electric wheelchairs. Walking speed and continuation time, but the energy consumption exceeds the standard

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