Apparatus for in situ chamfering motor commutator segments
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorSakuhei Ohashi
Life of this patent
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Abstract
An apparatus for the in situ chamfering of DC motor commutator segments 1 separated by insulating spacers 2 is directly mountable on the motor yoke 62, and includes a frame 32 mounting a reversible drive motor 30 and slidably carrying a reciprocating work table 42. A cutter head 44 mounting a chamfering bit 45 is rotatably mounted to the work table by a pin 43 and is swung out of engagement with the commutator segment assembly 11 during each return pass of the work table, during which time the motor rotor is advanced one pitch by a worm driven roller 53.
Claims15
An apparatus for the in situ chamfering of DC motor commutator segments, comprising:
- (a) frame means (32) stationarily mountable on a yoke (62) of a DC motor,
- (b) reversible drive means (30) stationarily mounted to the frame means,
- (c) cutter means including a cutter head (44) carrying a cutter bit (45),
- (d) a work table (42) movably mounting the cutter means and engaged with the drive means for linear reciprocation thereby in a direction parallel to a longitudinal axis of the motor,
- (e) means (47) mounted to the work table for moving the cutter means into engagement with a commutator segment assembly (11) of the motor during the movement of the work table in a first direction to effect the chamfering of two adjacent segments,
- (f) means (53) mounted to the frame means for incrementally rotating a rotor of the motor a distance corresponding to one pitch of the commutator segment assembly during the movement of the work table in a second, opposite direction, and
- (g) indexing means (46) mounted to the cutter means for engaging the commutator segment assembly to establish a precise centering of the cutter means relative to a gap between adjacent commutator segments.
Dependencies are inferred from the claim text.