Patent ID: 11897095
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An impact power tool comprising:
a main housing;
a motor;
a transmission housing coupled to the main housing, the transmission housing including a bearing pocket open to a front of the transmission housing and defined at least partially by a radially inward-extending flange;
an output shaft;
a cylinder concentrically disposed about the output shaft which receives torque from the motor causing the output shaft to rotate;
a bearing positioned within the bearing pocket adjacent and in abutting relationship with the radially inward-extending flange for rotatably supporting the output shaft in the transmission housing; and
a radially outward-extending flange on the output shaft that radially overlaps at least a portion of the bearing on an opposite side of the bearing as the radially inward-extending flange;
wherein a line of action of an axial reaction force applied to the output shaft is directed to the transmission housing via the radially outwardly-extending flange, the bearing, and the radially inward-extending flange, and
wherein the cylinder imparts repeated rotational impacts upon the output shaft through a plurality of protrusions, and
wherein a nominal axial clearance between a rear end of the output shaft and the cylinder is maintained in response to the application of the axial reaction force on the output shaft.