Brush device for an electric machine, and electric machine

摘要

A brush device (100) for an electric machine (10), having a brush (20) which is arranged in a brush guide element (21; 21a) so as to be longitudinally displaceable in the direction of a contact element (16) and which bears against the contact element (16) by way of a contact surface (30), wherein the brush (20) has a longitudinal axis (25) arranged at a first oblique angle (α) with respect to an axis of rotation (11) of the contact element (16), wherein that face side (23) of the brush (20) which is situated opposite the contact surface (30) is subjected to the spring force (F) of a spring element (32) in an abutment region (31).

主权项

1. A brush device (100) for an electric machine (10), having a brush (20) which is arranged in a brush guide element (21; 21a) so as to be longitudinally displaceable in a direction of a contact element (16) having an axis of rotation, wherein the brush bears against the contact element (16) by way of a contact surface (30), wherein the brush (20) has a longitudinal axis (25) which runs within a cross section of the brush in a center area of the brush, the longitudinal axis of the brush intersecting the axis of rotation of the contact element and being arranged at a first oblique angle (α) with respect to the axis of rotation (11) of the contact element (16), the first oblique angle (α) being between 60° and 80°, wherein a face side (23) of the brush (20) which is situated opposite the contact surface (30) is subjected to a spring force (F) of a spring element (32) in an abutment region (31), which spring force, on the brush (20), has a first force component (F1) acting perpendicular to the longitudinal axis, and has a second force component (F2) acting in the direction of the longitudinal axis, wherein the first force component presses the brush (20) at least regionally against a wall (34; 38) of the brush guide element (21; 21a), characterized in that a face side (22) of the brush (20) which faces toward the contact element (16) bears against the contact element (16) only by way of a subregion that forms the contact surface (30).