Snap-on fan cover for an electric motor

Electrical generator or motor structure – Dynamoelectric – Rotary

Patent

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Details

310 51, 310 85, H02K 500, H02K 524

Patent

active

053270363

ABSTRACT:
A motor assembly has a stator and rotor housed within a frame. An end shield is attached to one end of the frame for rotatably supporting a shaft extending therethrough. A fan is mounted to the shaft adjacent the end shield. A fan cover is mounted to the end shield and about the fan in a snap-fit manner. The end shield includes a front face and an annular side face, and has a plurality of slots formed in the annular face. The end shield also includes a boss adjacent each slot, which is formed to include at least one bearing surface and a ramp thereon. The fan cover includes a plurality of mounting brackets spaced about its inner periphery and extending outwardly toward the end shield. Each mounting bracket has a projection thereon, which is receivable within the slot on the annular face of the end shield. Each bracket also includes a backstop with a crushable rib thereon. As the projection is received in the slot, the bearing surface of the boss contacts and deforms the crushable rib on the backstop, thus ensuring a tight, snap-fit between the fan cover and the end shield.

REFERENCES:
patent: 4356930 (1982-11-01), Roper
patent: 4513214 (1985-04-01), Dieringer
patent: 4534088 (1985-08-01), Ricke
patent: 4742935 (1988-05-01), Schellenberg
patent: 5008575 (1991-04-01), Ishimoto et al.
patent: 5026476 (1991-06-01), Ishimoto et al.
patent: 5059843 (1991-10-01), Ishimoto et al.

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