Power tool
A power tool and torque adjustment technology, applied in the field of power tools, can solve problems such as short axial length of the fuselage
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[0025] refer to Figure 1 to Figure 2 , a three-function impact drill 1, can be operated in one of three modes of screwdriver, drilling and impact. The three-function hammer drill 1 includes a motor 3 having a rotating motor output shaft 5 for transmitting the rotational motion of the motor 3 to a spindle 7 . The main shaft 7 is located at the front end of the hammer drill 1 for driving the working head (not shown), and the rear end of the main shaft 7 is provided with an external spline 8 . A gear reduction mechanism 9 is provided between the motor 3 and the main shaft 7 , and the reduction gear mechanism 9 is used to reduce the higher rotational speed of the output shaft 5 of the motor and then transmit it to the main shaft 7 .
[0026] The gear reduction mechanism 9 includes a three-stage planetary gear set, the first-stage planetary gear set includes a first ring gear 11, the first planetary gear 13 meshes with the first ring gear 11, and the first sun gear 15 meshes with...
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