US 12,409,532 B2
Coupling device for replacement of gear box of electric torque wrench
Keum Joon Park, Suncheon-si (KR)
Assigned to BOLTING MASTER, Suncheon-si (KR)
Appl. No. 18/009,744
Filed by BOLTING MASTER, Suncheon-si (KR)
PCT Filed Dec. 14, 2021, PCT No. PCT/KR2021/019013
§ 371(c)(1), (2) Date Dec. 12, 2022,
PCT Pub. No. WO2023/090524, PCT Pub. Date May 25, 2023.
Claims priority of application No. 10-2021-0158559 (KR), filed on Nov. 17, 2021.
Prior Publication US 2024/0100665 A1, Mar. 28, 2024
Int. Cl. B25B 23/147 (2006.01); B25B 21/00 (2006.01)
CPC B25B 21/00 (2013.01) [B25B 23/147 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A coupling device for replacement of gear box of electric torque wrench, the coupling device comprising a coupling socket (100) including: a socket shaft (110) coupled with a motor rotating shaft of an electric motor mounted on a main body casing (10) of the electric torque wrench;
a socket body (120) mounted on a gear box coupling surface (11) corresponding to a coupled portion with the gear box (20) in the main body casing (10); and
a coupling adapter (200) attachably and detachably coupled to the coupling socket by being mounted on a main body coupling surface (21) corresponding to a coupled portion with the main body casing (10) in the gear box (20),
wherein the socket body (120) is integrally manufactured by including a base plate part (121) forming a bottom surface of the socket body and a cylindrical body part (122) forming an upper surface of the socket body,
the base plate part (121) is so manufactured as to cover the gear box coupling surface (11) matching to an outer shape of the gear box coupling surface (11), and provided at a center part of plate bottom surface with an inner circumferential cavity (121A), and includes a plurality of bolting coupling holes (121B) at an outer side of the plate for bolted fixing with the gear box coupling surface (11), and
the cylindrical body part (122) is protrusively formed toward an upper direction of the base plate part (121) while having a diameter smaller than that of the base plate part (121), has an inner circumferential cavity (122A) having a same sized diameter as that of the inner circumferential cavity (121A) while communicating with of the inner circumferential cavity (121A) provided on the base plate part (121), includes a through hole (122B) to allow the socket shaft (110) to be installed therethrough while being provided at an upper center part to communicate with the inner circumferential cavity, includes a ball bearing accommodation rail (122C) having a predetermined width depressed toward an inner side along an upper perimeter, and includes a plurality of first spline taps (122D) provided in an equidistance along a bottom perimeter of the cylindrical body part (122) at a connected portion between the base plate part (121) and the cylindrical body part (122).