| 摘要 |
<p>A push-pull chain garage door operator system includes a drive module (20) and an elongated guide rail (22) for a push-pull chain (101) connected to a carriage assembly (28) mounted on the guide rail. The chain is engaged with a sprocket (138) mounted on a generally rectangular plate-like molded plastic support member (30) which includes a serpentine idle chain storage slot (100) formed therein. The support member is releasably connected to a stamped metal frame plate (34) for covering the storage slot and supporting the drive module. The bottom wall of the support member supports a right angle speed reduction drive unit (50) connected to a drive motor (46) retained in a cradle (54) formed by an integral boss (56) on the support member. The motor and a starting capacitor therefor are retained in respective cradle portions of the boss by a removable retaining strap (58). A control circuit board (64) is mounted on the underside of the support member and a two-part shroud (66, 82) for the operator mechanism is releasably secured to the frame plate.</p> |
