US 12,263,564 B2
Wrench with preset torque
Jun Shao, Hangzhou (CN); Liang Hua, Hangzhou (CN); Linwei Xue, Hangzhou (CN); and Qiliang Xu, Hangzhou (CN)
Assigned to HANGZHOU XINMAI TECHNOLOGY CO., LTD., Hangzhou (CN)
Filed by Hangzhou Xinmai Technology Co., Ltd., Hangzhou (CN)
Filed on Nov. 15, 2022, as Appl. No. 17/986,985.
Claims priority of application No. 202211277291.X (CN), filed on Oct. 19, 2022.
Prior Publication US 2024/0131663 A1, Apr. 25, 2024
Prior Publication US 2024/0227134 A9, Jul. 11, 2024
Int. Cl. B25B 23/142 (2006.01); B25B 23/16 (2006.01)
CPC B25B 23/142 (2013.01) [B25B 23/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A wrench with preset torque, comprises a handle, a tube, an actuating part and a scale mark area, wherein an end of the tube is interpolated inside the scale mark area, a rocker arm of the actuating part extends into the tube, and cooperates with the tube via rotary movements, a front end portion of the actuating part is configured to conduct tool installation and dismantling work; the handle is provided at a tail portion of the scale mark area; the handle comprises a hollow rotation handle, a movable plug, a screw rod drive component and a locking component, an end portion of the hollow rotation handle cooperates with the scale mark area via rotary movements, and an end of the tube that extends into the scale mark area extends into the hollow rotation handle, the movable plug is provided at a tail end portion of the hollow rotation handle and is adjustable by pulling backwards, the screw rod drive component comprises a rotary portion and a screw rod portion, an adjusting threaded sleeve is sleeved over the screw rod portion and the adjusting threaded sleeve is slidable axially in the hollow rotation handle; the screw rod portion can drive the adjusting threaded sleeve to move during rotation, the adjusting threaded sleeve can drive the rocker arm to pivot against wherein the rocker arm is connected with the tube; a tube positioning piece is provided on the rotary portion and the tube positioning piece engages with the rotary portion by rotation, and the tube positioning piece is integrally connected with the tube; the locking component comprises a handle insert and a plurality of positioning pins, the handle insert is installed on the rotary portion via at least one key, and an outer portion of the handle insert is connected with an inner surface of the hollow rotation handle, the plurality of positioning pins are provided at a front end portion of the movable plug, the plurality of positioning pins pass through at least one hole in the handle insert, and is inserted into at least one positioning hole provided at a tail end surface of the tube positioning piece, wherein, the plurality of positioning holes at the tail end surface of the tube positioning piece is circumferentially distributed.