Speed reducer and wheel edge driving mechanism with speed reducer and electric vehicle

Abstract

The invention provides a speed reducer, a wheel edge driving mechanism with the speed reducer and an electric vehicle. The wheel edge driving mechanism of the electric vehicle comprises a wheel edge motor and the speed reducer which is in transmission connection with the wheel edge motor; any of transmission shafts of the speed reducer is provided with a ratchet wheel which rotates synchronously with the transmission shaft; a counting structure is arranged on the ratchet wheel; an ABS (anti-lock braking system) sensor for detecting the rotating speed of a wheel, which corresponds to the counting structure of the ratchet wheel, is arranged on a shell; and a parking pawl is also movably arranged on the shell and can stop and unlock the ratchet wheel during movement. The ratchet wheel is matched with the ABS sensor to cause an ABS system to detect the rotating speed of the wheel, and meanwhile is matched with the parking pawl to realize parking, so that the integration of ABS speed measurement and P-shift parking is realized, the functionality of the speed reducer is improved, the volume of the wheel edge driving mechanism is also greatly reduced, and the performance of the vehicle isoptimized; in addition, as the ratchet wheel does not involve in transmission, the ratchet wheel is not affected by transmission speed ratio, and therefore, the wheel edge driving mechanism can be matched with various electric vehicles in use.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a speed reducer, a wheel-side drive mechanism using the speed reducer, and an electric vehicle. Background technique [0002] With the continuous scarcity of oil and gas resources, green energy electric vehicles have been rapidly developed, and with the continuous maturity of motor technology, electric vehicles using wheel drive and wheel hub drive have been more and more used. In order to improve and optimize the various performances of electric vehicles, wheel drive mechanisms are developing in the direction of small size and high integration. [0003] For an electric vehicle, especially a passenger car, that uses a wheel-side drive mechanism, many functions need to be realized through the wheel-side drive mechanism, such as the ABS function and safe parking. However, the existing electric vehicles do not have a wide range of matching for the P gear, that is, the parking gear, on the w...

AI Technical Summary

Problems solved by technology

However, the existing electric vehicles do not have a wide range of matching for the P gear, that is, the parking gear, on the wheel drive mechanism, and most of the ABS sensors used for speed measurement are installed on the wheel hub, which takes up a large space and has a large impact on the transmission. The strength and weight of the shaft also have a great influence

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