US 11,719,314 B2
Nut structure for electric pushing rod
Yu-Chang Lin, New Taipei (TW)
Assigned to TIMOTION TECHNOLOGY CO., LTD., New Taipei (TW)
Filed by TIMOTION TECHNOLOGY CO., LTD., New Taipei (TW)
Filed on Apr. 11, 2021, as Appl. No. 17/227,353.
Claims priority of application No. 110202305 (TW), filed on Mar. 3, 2021.
Prior Publication US 2022/0282775 A1, Sep. 8, 2022
Int. Cl. F16H 25/24 (2006.01); F16B 37/00 (2006.01)
CPC F16H 25/24 (2013.01) [F16B 37/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A nut structure for an electric pushing rod, the electric pushing rod comprising a guide screw (A), the guide screw (A) comprising an outer thread (A1), the nut structure comprising:
a metal cylinder (10), comprising a pivot hole (11) being passed through by the guide screw (A), and an inner thread (12) directly formed on an inner wall of the metal cylinder (10), wherein the metal cylinder (10) comprises an axial direction (D1) and a positioning groove (13) formed on the inner wall along the axial direction (D1) and cutting through the inner thread (12) till the inner wall, and a filling hole (14) is formed through the metal cylinder (10) and communicates with the pivot hole (11) for plastic liquid filling therethrough to completely fill the positioning groove (13) to form a positioning protrusion (23) after solidifying, wherein the positioning protrusion (23) is corresponding to and engaging with the positioning groove (13); and
a plastic intermediate component (20), insert molding into the metal cylinder (10) and covering the inner thread (12), disposed between the outer thread (A1) and the inner thread (12), and comprising a fixed side thread (21) mounted on the inner thread (12) and a driving side thread (22) screwed with the outer thread (A1);
wherein a thickness (t) of the plastic intermediate component (20) between a surface of the fixed side thread (21) and a surface of the driving side thread (22) is between 0.6 mm and 1 mm.