US 11,806,841 B2
Magnetic clamping device, and magnetic force generating mechanism for magnetic clamping device
Ichiro Kitaura, Itami (JP); Taichiro Kitaura, Itami (JP); and Hiroo Hashimoto, Itami (JP)
Assigned to Pascal Engineering Corporation, Itami (JP)
Appl. No. 17/251,890
Filed by Pascal Engineering Corporation, Itami (JP)
PCT Filed Jun. 12, 2019, PCT No. PCT/JP2019/023376
§ 371(c)(1), (2) Date Dec. 14, 2020,
PCT Pub. No. WO2019/240201, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 2018-113212 (JP), filed on Jun. 13, 2018.
Prior Publication US 2021/0122011 A1, Apr. 29, 2021
Int. Cl. B25B 11/00 (2006.01)
CPC B25B 11/002 (2013.01) 10 Claims
OG exemplary drawing
 
1. A magnetic clamping device having a baseplate comprising soft magnetic material provided with a securing surface for holding an object to be clamped so as to abut one outer surface;
a plurality of hollow housing portions that pass all the way therethrough from the securing surface thereof to the back being provided at this baseplate;
one magnetic force generating mechanism being housed within each of the respective hollow housing portions;
these magnetic force generating mechanisms each being such that
a housing cover body comprising soft magnetic material is arranged centrally at the securing surface of the hollow housing portion, at a height which is coplanar with the securing surface of the baseplate, and in such fashion as to be separated from the hollow housing portion;
a nonmagnetic metal frame body is arranged in the vicinity of the securing surface, at a portion separated from and between an outer edge portion at an inner wall of the hollow housing portion of the baseplate and an outer edge portion at the outside circumference of this housing cover body;
at the back of this nonmagnetic metal frame body, a portion separated from and between the inner wall of the hollow housing portion and the housing cover body is made to serve as magnet housing space, multipartite nonreversible permanent magnets being housed therewithin in such fashion as to be arrayed along the outside circumference of the housing cover body;
in a space remaining at a back portion within the hollow housing portion at which this housing cover body and these nonreversible permanent magnets arrayed along the outside circumference thereof are arranged, a reversible permanent magnet is arranged at a central region thereof in opposed fashion with respect to the housing cover body, a magnetic polarity switching coil for the reversible permanent magnet being arranged peripherally about this reversible permanent magnet;
a back opening of the hollow housing portion at the baseplate is closed by a base cover body;
a plurality of the magnetic force generating mechanisms being arranged within the baseplate;
the magnetic clamping device being characterized in that the metal frame body is furthermore respectively joined in integral fashion to the baseplate at a location in the vicinity of the securing surface at the outer edge portion at the inner wall of the hollow housing portion, and to the housing cover body at a location in the vicinity of the outer edge portion at the outside circumference thereof.