Johnson Electric S.a.

Zte Corporation

Hong Yu Ding

Jing Ning Ta

Yue Li

Tao Zhang

Chui You Zhou

Yue Wang

Xiao Wang

Jie Chai

Xiaojiang Han

Gang Zhao

Dennis Francis Gorosin

Xing Ju Yi

Zhong Ping Wu

Guo Ping Zhang

Chi Wang Cheung

A drive apparatus for an electric bike includes a hollow housing body, an internal ring gear fixed to the housing body, and a main shaft. At least two motor units are mounted in the housing body. Each motor unit includes a support bracket and a number of motors mounted on the support bracket. Each motor drives the internal gear through a transmission mechanism to rotate the housing body about the main shaft. The motors share one controller. Peaks of the motor cogging torque can be staggered.

Drive apparatus

A drive unit includes an electric motor, a worm shaft coupled to the motor, a worm gear engaging with the worm shaft, and an output shaft connected to the worm gear. The motor has a motor shaft on which the worm shaft is fixed. The worm shaft is made of plastic. The drive unit further includes a metallic sleeve press fitted to the motor shaft. An outer profile of the sleeve is non-circular. A correspondingly shaped receiving hole is formed in the worm shaft to receive the sleeve. The sleeve rotates with the motor shaft and drives the worm shaft.

Drive unit

The planetary gear train includes a first sun gear driven by the motor, a first ring gear, a first carrier, and a plurality of first planetary gears arranged at one side of the first carrier and meshing with the first sun gear and the first ring gear. The first sun gear, first planetary gears and first ring gear are helical gears so that meshing surface is increased. Helical teeth formed on an inner surface of the first ring gear mesh with the helical teeth of the first planetary gears. Therefore, the operation is stable and the noise is low. The planetary gears are made of plastic to further decrease the noise. The first ring gear is made by sintered powder metallurgy.

A method and apparatus for handover between base stations are disclosed. The method includes: a first base station sending handover request messages to neighboring base stations (); the neighboring base stations judging whether to accept the handover according to information in the handover request messages, and sending judgment results to the first base station through request response messages (); the first base station determining one destination base station from the neighboring base stations which are able to accept the handover, and sending a confirmation handover message to the destination base station (); the destination base station allocating resources for a user equipment after receiving the confirmation handover message, and sending the allocated resources to the first base station through a confirmation handover response message (); and the first base station indicating that the user equipment hands over to the destination base station after receiving the confirmation handover response message ().

Method and device for switching between base stations

Growing community of inventors

Shenzhen, China

Hong Yu Ding