Patents by Inventor Chunrui LI

Chunrui LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240269819
    Abstract: A power tool includes a transmission mechanism provided with transmission gears for making an output shaft output different rotational speeds, where the number of transmission gears is greater than or equal to 3; the transmission mechanism includes multi-stage planetary gear sets; each stage of the multi-stage planetary gear sets includes one layer of planet gears in an axial direction; the total number of the multi-stage planetary gear sets is less than or equal to the number of transmission gears; and among the multi-stage planetary gear sets in the multiple stages, a first-stage planetary gear set closest to a motor shaft includes a first drive state and a first variable state, and any one of the remaining planetary gear sets is connected to a clutch mechanism.
    Type: Application
    Filed: April 22, 2024
    Publication date: August 15, 2024
    Inventors: Chunrui Li, Shubin Tong, Hanqing Zheng
  • Publication number: 20230128074
    Abstract: A power tool includes an output assembly and a battery pack. The output assembly is disposed at an end portion of a first handle, the output assembly includes at least two output units spaced apart and used for connecting working accessories, and the output assembly is rotatable about a shift axis to shift an output unit among the at least two output units to a working position or a non-working position. The battery pack is disposed at a bottom of a body, the battery pack includes a standing surface through which the power tool is capable of standing, and when the power tool stands, a projection of a center of gravity of the power tool on the standing surface is in the standing surface.
    Type: Application
    Filed: December 20, 2022
    Publication date: April 27, 2023
    Inventors: Hanqing Zheng, Xiangqing Fu, Liang Chen, Chunrui Li
  • Publication number: 20230019359
    Abstract: A torque output tool includes an output shaft, a motor, a transmission assembly, and a gearbox. The gearbox is used for accommodating the transmission assembly. The transmission assembly includes a first planetary gearset and a second planetary gearset. The transmission assembly is capable of being switched to a first state and a second state such that the transmission assembly outputs a first gear ratio or a second gear ratio separately, where the first gear ratio is greater than the second gear ratio. When the transmission assembly outputs the first gear ratio, a rotational speed of the output shaft is greater than or equal to 300 r/min and less than or equal to 800 r/min. A length of the gearbox in an axial direction is greater than or equal to 38 mm and less than or equal to 46 mm.
    Type: Application
    Filed: September 30, 2022
    Publication date: January 19, 2023
    Inventors: Chunrui Li, Shubin Tong, Hejun Wang, Hanqing Zheng
  • Publication number: 20230007837
    Abstract: An electric drill and an electric tool, including: a housing provided with an air inlet and an air outlet; a motor received in the housing, wherein the motor at least comprises a motor shaft; a drill bit, acting on a workpiece; the motor shaft is connected to the drill bit; a gearbox arranged in the housing for accommodating the transmission assembly; a fan supported by the motor shaft; wherein the gearbox is formed with a passage, and at least a part of a flow path of an airflow that enters the housing from the air inlet and flows out of the housing from the air outlet is provided on the passage.
    Type: Application
    Filed: June 22, 2022
    Publication date: January 12, 2023
    Inventors: Hanqing Zheng, Chunrui Li, Rui Zhan
  • Patent number: 10843314
    Abstract: A power tool includes a motor, an output shaft and a gearbox assembly. The output shaft outputs torque when driven by the motor to rotate around a first axis. The gearbox assembly transmits power between the motor and the output shaft. The gearbox assembly includes a first case and a second case. The first case and the second case are configured to be coupled to each other to form an accommodating cavity. The gearbox assembly further includes a ring gear, a planet gear, a sun gear, and a front ring gear. The ring gear is rotatably disposed in the accommodating cavity. The planet gear is engaged with the ring gear. The sun gear is engaged with the planet gear.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 24, 2020
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventor: Chunrui Li
  • Publication number: 20180318988
    Abstract: A power tool includes a motor, an output shaft and a gearbox assembly. The output shaft outputs torque when driven by the motor to rotate around a first axis. The gearbox assembly transmits power between the motor and the output shaft. The gearbox assembly includes a first case and a second case. The first case and the second case are configured to be coupled to each other to form an accommodating cavity. The gearbox assembly further includes a ring gear, a planet gear, a sun gear, and a front ring gear. The ring gear is rotatably disposed in the accommodating cavity. The planet gear is engaged with the ring gear. The sun gear is engaged with the planet gear.
    Type: Application
    Filed: April 18, 2018
    Publication date: November 8, 2018
    Inventor: Chunrui LI