Patent ID: 7116026
Filing Date: 2006-10-03
Classification: H02K

Abstract:
1. An adhesion structure for a motor for adhering a rotor or a stator having a first linear expansion coefficient to a plurality of magnets arranged circumferentially on the rotor or stator, said magnets having a second linear expansion coefficient, which differs from the first linear expansion coefficient, the adhesion structure comprising: a circumferentially continuous groove formed in a surface of one of said rotor and said stator to form a thickness determining means extending in an axial direction of the rotor; and an adhesive agent in the circumferentially continuous groove for forming an adhesive agent layer; wherein the thickness determining means determines the thickness of the adhesive agent layer formed from the adhesive agent so as to absorb shearing stress produced by the difference between the first and second linear thermal expansion coefficients at a surface adhered to the magnets, wherein the thickness determining means further includes: an opposing surface defined on a surface of each of the magnets opposed to the rotor or the stator and having a radius of curvature that is smaller than the radius of the rotor or the stator; and a gap defined between the rotor or the stator and the opposing surface of each of the magnets.