US 12,145,826 B2
Transmission assembly and lifting column
Weiqiang Li, Zhejiang (CN); and Bing Li, Zhejiang (CN)
Assigned to NINGBO HEALTHKEY MOTION TECHNOLOGY CO., LTD, Zhejiang (CN)
Appl. No. 17/625,101
Filed by NINGBO HEALTHKEY MOTION TECHNOLOGY CO., LTD, Zhejiang (CN)
PCT Filed Dec. 30, 2019, PCT No. PCT/CN2019/129814
§ 371(c)(1), (2) Date Jan. 6, 2022,
PCT Pub. No. WO2020/135858, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 201811632729.5 (CN), filed on Dec. 29, 2018.
Prior Publication US 2022/0274814 A1, Sep. 1, 2022
Int. Cl. B66F 3/00 (2006.01); B66F 3/10 (2006.01); B66F 3/44 (2006.01); F16H 25/20 (2006.01)
CPC B66F 3/10 (2013.01) [B66F 3/44 (2013.01); F16H 25/20 (2013.01); F16H 2025/2059 (2013.01); F16H 2025/2084 (2013.01); F16H 2025/209 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A transmission assembly, comprising a first screw rod, a second screw rod, a first transmission sleeve sleeved over the first screw rod, and an actuating device for driving the first transmission sleeve to rotate, wherein an end of the first screw rod proximal to the actuating device is fixed and does not rotate, and an end of the second screw rod distant from the actuating device is fixed and does not rotate; a second transmission sleeve is disposed between the first screw rod and the second screw rod, the second transmission sleeve and the first transmission sleeve are synchronously rotatable and are axially extensible and retractable relative to each other, and both ends of the second transmission sleeve are in threaded transmission connection with the first screw rod and the second screw rod, respectively.