US 11,986,930 B2
High-torque impact wrench
Xiaorong Li, Zhejiang (CN); and Fazheng Yang, Zhejiang (CN)
Assigned to Zhejiang Rongpeng Air Tools Co., Ltd., Zhejiang (CN)
Filed by Xiaorong Li, Zhejiang (CN); and Fazheng Yang, Zhejiang (CN)
Filed on Aug. 25, 2021, as Appl. No. 17/412,240.
Prior Publication US 2023/0072316 A1, Mar. 9, 2023
Int. Cl. B25B 21/02 (2006.01)
CPC B25B 21/02 (2013.01) 7 Claims
OG exemplary drawing
 
1. A high-torque impact wrench, comprising
a case, an engine body and a handhold disposed in the case,
a base disposed at a bottom of the handhold,
a battery pack disposed in an inside of the base,
a motor disposed at a rear end of the engine body,
an output shaft disposed at a front end of the engine body, and a front end of the output shaft extending out of the engine body,
a spindle disposed between the motor and the output shaft, a spindle seat disposed at a rear end of the spindle,
an impact block disposed outside the spindle,
a steel ball track disposed at outer wall of the spindle,
a steel ball, which is matching the impact block, disposed inside the steel ball track, the motor shaft of the motor being connected to the spindle through an impact mechanism;
a ring-shaped hidden trough disposed at a rear end of the impact block includes;
a ring-shaped ball slideway disposed at a bottom of the hidden trough has;
a plurality of balls evenly distributed on the circumference of the ball slideway;
a ring-shaped swivel plate disposed at the bottom of the hidden trough has; a front sidewall of the swivel plate be attached to a rear end of the ball;
a movement gap disposed between an inner wall of the swivel plate and an inner wall of the hidden trough;
an impact spring disposed in the hidden trough; wherein an front end of the impact spring is pressed against a rear side wall of the swivel plate, a rear end of the impact spring extends backward to an outside of the hidden trough and is pressed against a front side wall of the spindle seat.