Shaft linear motor with improved structural strength

摘要

A shaft linear motor includes an armature portion, a magnetic way and a sealing resin. The armature portion includes a frame, two ribs and a bobbin. The frame is formed with a receiving space therein. The two ribs are disposed on an inner wall of the frame. The ribs are respectively formed with a sectional surface. The bobbin is disposed in the receiving space and formed with an axially penetrated hole. The magnetic way is linearly and movably disposed in the axially penetrated hole. The sealing resin is fully filled in the receiving space for wrapping the inner wall of the frame and the sectional surfaces.

主权项

1. A shaft linear motor comprising:
an armature portion comprising:
a frame formed with two sidewalls and a receiving space defined between the two sidewalls;at least one first rib and at least one second rib, disposed in the receiving space, and arranged on an inner wall of the frame, the first rib comprising at least one first sectional surface, the second rib comprising at least one second sectional surface, wherein the first sectional surface and the second sectional surface are respectively adjacent to the inner wall of the frame, the first rib is formed with at least one first screw passage communicated with an outer surface of one of the two sidewalls of the frame, and the second rib is formed with at least one second screw passage communicated with an outer surface of the other of the two sidewalls of the frame; anda bobbin disposed in the receiving space, being reeled with a coil winding set on an outer wall of the bobbin, and spaced with an interval with respect to the first rib and the second rib, the bobbin being formed with an axially penetrated hole; a magnetic way linearly and moveably disposed in the axially penetrated hole of the bobbin; and a sealing resin fully filled in the receiving space for wrapping the inner wall of the frame, the coil winding set and the first sectional surface and the second sectional surface.