Armature assembly with creepage shield
AssigneeRyobi North America, Inc.
InventorsR. Gerald Satterfield, W. Keith Glenn
Life of this patent
Estimating the term…
Abstract
An armature assembly for use in a motor has an annual creepage shield received on the armature shaft between the bearing and the commutator. The creepage shield has a first face adjacent to the commutator, and a second face adjacent to the bearing. The second face has at least one generally annular surface interruption to increase effective creepage distance between the commutator and the bearing.
Claims20
An armature assembly for use in a motor, the assembly comprising:
- an armature shaft having first and second ends;
- a commutator affixed generally adjacent to the armature shaft first end for rotation together with the armature shaft;
- a bearing received on the armature shaft first end;
- and
- an annular creepage shield received on the armature shaft between the bearing and the commutator, the creepage shield having a first face immediately adjacent and in close proximity to the commutator, and a second face adjacent to and abutting the bearing, the second face having at least one generally annular surface interruption to increase effective creepage distance between the commutator and the bearing.
A motor assembly comprising:
- a housing;
- a field disposed in the housing;
- a rotatable armature shaft extending through the housing and having first and second ends;
- a commutator affixed generally adjacent to the armature shaft first end for rotation together with the armature shaft;
- a pair of brushes affixed to the housing and contacting the commutator;
- a bearing received on the armature shaft first end;
- and
- an annular creepage shield received on the armature shaft between the bearing and the commutator, the creepage shield having a first face immediately adjacent and in close proximity to the commutator, and a second face adjacent to and abutting the bearing, the second face having at least one generally annular surface interruption to increase effective creepage distance between the commutator and the bearing.
For use in an armature assembly of a motor, the armature assembly including an armature shaft having first and second ends, a commutator affixed generally adjacent to the armature shaft first end for rotation together with the armature shaft, and a bearing received on the armature shaft first end, a component comprising:
- an annular creepage shield for placement about the armature shaft between the bearing and the commutator, the creepage shield having a first face immediately adjacent and in close proximity to the commutator, and a second face adjacent to and abutting the bearing when placed about the armature shaft, the second face having at least one generally annular surface interruption to increase effective creepage distance between the commutator and the bearing.
Dependencies are inferred from the claim text.