Abstract: A linear motor includes a stator module, a rotor module and an extension rod. The stator module includes a first stator unit and a second stator unit. The first stator unit includes an upper end cap including an upper holder member and an upper bobbin integrally extended from the upper holder member. The second stator unit includes a bottom end cap and a second winding. The bottom end cap includes a bottom holder member and a bottom bobbin connected to the bottom holder member and abutted against the upper bobbin. The rotor module is rotatably mounted in the stator module. The extension rod is linearly movably mounted in the stator module. The upper bobbin is integrally extended from the upper holder member. The fabrication of the linear motor is simple, ensuring a high level of precision.

Abstract: An anti-jam structure for linear actuator includes a screw nut including a screw rod passage defining an internal thread segment and a threadless segment and one or multiple elongated slots longitudinally extended from one end thereof corresponding to the threadless segment and in communication between the screw rod passage and the atmosphere, a cover member mounted on the outside of the screw nut to block the elongated slots, and a magnet holder defining therein an accommodation chamber that accommodates the screw nut and the cover member. Thus, during operation of the linear actuator, the elongated slots enable the screw nut to be elastically compressed, reducing the risk of screw rod jam due to bearing of a load or high vibrations.

Abstract: A linear motor includes a stator module, a rotor module and an extension rod. The stator module includes a first stator unit and a second stator unit. The first stator unit includes an upper end cap including an upper holder member and an upper bobbin integrally extended from the upper holder member. The second stator unit includes a bottom end cap and a second winding. The bottom end cap includes a bottom holder member and a bottom bobbin connected to the bottom holder member and abutted against the upper bobbin. The rotor module is rotatably mounted in the stator module. The extension rod is linearly movably mounted in the stator module. The upper bobbin is integrally extended from the upper holder member. The fabrication of the linear motor is simple, ensuring a high level of precision.