Seal arrangement with encoder and magnetization head for the encoder
View Patent ↗The invention relates to a seal arrangement for sealing off at least one radial interspace between at least one bearing ring which can rotate and at least one rotationally fixed bearing ring. The seal arrangement is provided with at least a first carrier, the first carrier carrying at least one resilient seal and being fixed to a rotationally fixed bearing ring, and a second carrier, the second carrier being fixed to the bearing ring that can rotate and carrying at least one encoder. The encoder has an outwardly oriented circumferential surface in the shape of a truncated circular cone.
1. A magnetization head for polarizing an encoder having an outwardly oriented circumferential surface which defines a truncated circular cone, in which the magnetization head has on its inner circumference an inner circumferential surface defining an inner cone, the inner circumferential surface corresponding with the circumferential surface of the truncated cone of the encoder; the rectilinear inner circumferential lines of the inner circumferential surface describing the inner cone being inclined with respect to the axis of rotation of the magnetization head, and being longer than the circumferential lines oriented in the same direction as the inner circumferential lines and describing the circumferential surface of the encoder.
2. The magnetization head as claimed in claim 1 , in which the smallest inner cone diameter of the inner cone is smaller than the smallest external diameter of the truncated circular cone, and in which the inner circumferential surface of the magnetization head, which is seated on the encoder during polarization and bears on the circumferential surface, projects axially beyond the circumferential surface of the encoder on both sides.
3. The magnetization head as claimed in claim 1 , further comprising an encoder having an outwardly oriented circumferential surface which defines a truncated circular cone, said encoder being engaged with said magnetization head.