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    • 3. 发明授权
    • Armature for high-speed electric motors force-ventilated in air
containing abrasive dust
    • 用于高速电动机的电枢在含有磨料粉尘的空气中强制通风
    • US5352948A
    • 1994-10-04
    • US966164
    • 1993-01-11
    • Manfred KirnWerner GrammerGerhard KraemerMeinhard Eule
    • Manfred KirnWerner GrammerGerhard KraemerMeinhard Eule
    • H02K3/34H02K3/38H02K3/487H02K3/51H02K3/48
    • H02K3/487H02K3/51
    • The armature (1) for high-speed electric motors force-ventilated in air containing abrasive dust, in particular in electric tools including right angle grinders, has windings which are laid in slots (7) of an armature laminate stack (5), and are held down in the slots (7) by elongated, elastic slot seals (15), and forth winding overhangs (9, 11) on the end faces of the armature. To increase the strength of the armature winding, the resistance to cooling air containing abrasive dust, and to improve the cooling, the slot seals (15) project over the slots (7), follow the contour of the winding overhangs (9, 11), in particular along surface lines, in the armature longitudinal direction, extend up to the end faces of the armature (1), and their ends are secured there by a ring (19) or cord winding (17).
    • PCT No.PCT / DE91 / 00456 Sec。 371日期:1993年1月11日 102(e)日期1993年1月11日PCT 1991年5月28日PCT PCT。 出版物WO92 / 00626 日期:1992年1月9日。用于高速电动机的电枢(1)在含有磨料粉尘的空气中强制通风,特别是在包括直角磨床的电动工具中具有绕组,其放置在电枢的槽(7)中 并且通过细长的弹性狭缝密封件(15)和电枢的端面上的第四绕组突出部(9,11)将其压紧在槽(7)中。 为了增加电枢绕组的强度,阻止含有磨料粉尘的冷却空气,并且为了改善冷却,槽密封件(15)突出在槽(7)上,沿着绕组突出部(9,11)的轮廓, 特别是沿着电枢纵向的表面线延伸到电枢(1)的端面,并且它们的端部通过环(19)或电线绕组(17)固定在那里。