| 摘要 |
A subframe for a motor and a transmission to be employed in a portable power tool. The subframe is formed of two plate-like elements that are substantial mirror images of one another containing complementary cut out portions for receiving the motor and transmission and which are secured together to define the subframe. Each plate-like member includes complementary struck out portions for receiving bearings for mounting rotating parts of the transmission and the motor. The recesses may be semi-spherical for receiving spherical bearings or cylindrical for receiving sleeve or cylindrical or ball bearings. The plate-like members may be secured together by any of a variety of means such as sheet metal screws, struck metal tabs, spot welding or adhesives. The subframe may include a rotary output or may mount within its confines a mechanism for converting rotary motion to any desired type of motion as for example, reciprocating motion. Alternately, a subframe having a rotary output shaft may be employed in conjunction with an adaptor for converting rotary motion to reciprocating motion so that a single type of subframe may be employed in power tools requiring both rotary outputs and reciprocating outputs. |
