An improved drive machine for electric vehicle hub electromotor

Abstract

The utility model relates to an improved transmission mechanism for wheel hub motors of electric vehicles, which comprises an electric motor, a wheel hub casing, a main shaft, a speed reducer and a clutch; wherein, the stator and the stator casing of the electric motor are fixedly connected on the main shaft; the rotor is arranged inside the stator and the stator casing and is connected with the speed reducer; the speed reducer is connected with the wheel hub casing through the clutch. The utility model is characterized in that: the speed reducer comprises two positioning disks, a planetary gear, a bearing, a connecting shaft and a casing. The three planetary gears are symmetrically arranged between the front and the rear positioning discs; both ends of rotating shafts of the planetary gear are fixedly connected on the front and the rear positioning discs; a circle of teeth are arranged inside the casing and meshed with the three planetary gears; the casing is mechanically fixed with the electric stator and stator casing. The utility model has the advantages of small motor output loss, low noise, and long service life.

Description

technical field [0001] The invention relates to electric vehicle motor technology, in particular to an improvement of a transmission mechanism of an electric wheel hub motor. Background technique [0002] The electric wheel hub has gradually evolved from the earliest brushed motor to the currently widely used brushless motor, and the brushless motor has gradually developed from the previous direct drive of the motor, and the current drive is driven by the reduction mechanism to increase the output torque; such as the Chinese Patent Announcement No. It is: an electric hub motor of CN1937363. This hub motor is composed of a hub shell, a motor, a reducer and a clutch. The motor, reducer and clutch are arranged in sequence and arranged coaxially. The main shaft is connected to the hub shell through a bearing. The motor transmits power to the clutch through the reducer at a high torque and low speed, and drives the hub shell to rotate through the clutch to drive the electric vehi...

AI Technical Summary

Problems solved by technology

[0002] The electric wheel hub has gradually evolved from the earliest brushed motor to the currently widely used brushless motor, and the brushless motor has gradually developed from the previous direct drive of the motor, and the current drive is driven by the reduction mechanism to increase the output torque; such as the Chinese Patent Announcement No. It is: an electric hub motor of CN1937363. This hub motor is composed of a hub shell, a motor, a reducer and a clutch. The motor, reducer and clutch are arranged in sequence and arranged coaxially. The main shaft is connected to the hub shell through a bearing. The motor transmits power to the clutch through the reducer at a high torque and low speed, and drives the hub shell to rotate through the clutch to drive the electric vehicle. The hub motor of this electric vehicle has a large output torque, low power consumption, and low heat generation. The working performance is stable, but because the internal components are not tightly matched, there is uneven force between the components, the noise increases after a period of use, the inner wear of the hub is serious, and the service life is not long; the applicant has long-term practice It was found that the concentricity of the transmission mechanism inside the hub motor is not high. Due to the uneven force on each component, under the high-speed rotation of the motor, the local force on each working part of the transmission mechanism is relatively large, which is likely to cause the component to be stressed first. Abrasion occurs. Partial wear of parts causes the combination of various parts to be no longer as tight as before, and the internal parts become loose, so the noise increases during operation, and the speed of wear gradually accelerates until it cannot continue to work, thus making the entire hub motor The noise is loud and the service life is not long. In addition, the wear of the transmission parts increases the power output by the motor to overcome the resistance of the transmission mechanism, which reduces the actual output power and reduces the mileage of the battery after each charge.

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