US 12,247,646 B2
Self-locking drive and linear actuator
Yujie Cen, Shaoxing (CN); and Shiyi Tang, Shaoxing (CN)
Assigned to ZHEJIANG JIECANG LINEAR MOTION TECHNOLOGY CO., LTD., Shaoxing (CN)
Appl. No. 18/271,268
Filed by ZHEJIANG JIECANG LINEAR MOTION TECHNOLOGY CO., LTD., Zhejiang (CN)
PCT Filed Apr. 24, 2022, PCT No. PCT/CN2022/088648
§ 371(c)(1), (2) Date Jul. 7, 2023,
PCT Pub. No. WO2022/267669, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 202121418470.1 (CN), filed on Jun. 24, 2021.
Prior Publication US 2024/0068550 A1, Feb. 29, 2024
Int. Cl. F16H 25/20 (2006.01); F16H 25/22 (2006.01)
CPC F16H 25/2015 (2013.01) [F16H 25/229 (2013.01); F16H 2025/2031 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A self-locking drive, comprising:
a housing and a drive shaft for outputting a driving force, wherein:
an endcap is provided at an end portion of the housing;
a self-locking mechanism configured to apply a self-locking force to the drive shaft is provided in the endcap;
the self-locking mechanism comprises a friction seat sleeved over the drive shaft and rotatable synchronously with the drive shaft, and a friction ring mounted in the endcap and secured to the endcap, the friction seat being interference-fitted with the friction ring to enable two-way self-locking to the drive shaft; and
the friction ring comprises:
an inner race and an outer race, the friction ring being sleeved to an outer periphery of the friction seat via the inner race, the outer race being snap-fitted with an inner wall of the endcap to limit circumferential rotation of the friction ring; and
a positioning flange connected to the outer race, wherein a bearing is provided outside the drive shaft, a positioning step is provided at the inner wall of the endcap, and the positioning flange is limited between the bearing and the positioning step.