US 11,967,876 B2
Industrial heavy load electric linear actuator
Yu-Chang Lin, New Taipei (TW)
Assigned to TIMOTION TECHNOLOGY CO., LTD., New Taipei (TW)
Filed by TIMOTION TECHNOLOGY CO., LTD., New Taipei (TW)
Filed on Jan. 18, 2022, as Appl. No. 17/577,864.
Claims priority of application No. 110214592 (TW), filed on Dec. 7, 2021.
Prior Publication US 2023/0179073 A1, Jun. 8, 2023
Int. Cl. H02K 41/00 (2006.01); H02K 7/00 (2006.01); H02K 7/116 (2006.01); H02K 41/02 (2006.01)
CPC H02K 41/02 (2013.01) [H02K 7/003 (2013.01); H02K 7/116 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An industrial heavy load electric linear actuator, comprising:
a gearbox (10);
an electric motor (20), connected to the gearbox (10);
a lead screw (30), a portion thereof received inside the gearbox (10) and driven by the electric motor, and another portion thereof extended to outside of the gearbox (10);
an extension pipe (40), movably fastened with the lead screw (30); and
a load bearing structure (50), comprising a sleeve (51), a bearing (52), a fastening element (53), a fixation seat ring (54) and a rear supporting seat (55), the sleeve (51) mounted on the lead screw (30) and holding the bearing (52) jointly with the fastening element (53), and the fixation seat ring (54) and the rear supporting seat (55) holding the bearing (52) and disposed on outer perimeters of the sleeve (51) and the fastening element (53),
wherein the bearing (52) comprises an inner ring (521) and an outer ring (522) disposed on outer perimeter of the inner ring (521), the sleeve (51) and the fastening element (53) jointly hold the inner ring (521), and the fixation seat ring (54) and the rear supporting seat (55) jointly hold the outer ring (522);
wherein the lead screw (30) comprises a first threaded section (31), a first shaft section (32) extended from the first threaded section (31), a second shaft section (33) extended from the first shaft section (32) and a second threaded section (34) extended from the second shaft section (33), a diameter of the second shaft section (33) is smaller than a diameter of the first shaft section (32), and a stopping surface (321) is disposed between the first shaft section (32) and the second shaft section (33);
wherein the first threaded section (31) is movably fastened to the extension pipe (40), the sleeve (51) is mounted on the second shaft section (33) and abuts against the stopping surface (321), and the fastening element (53) is fastened to the second threaded section (34) and presses the inner ring (521) jointly with the sleeve (51).