US 2010/0293860 A1Published application

Hand-pulling drive mechanism for an industrial door

OwnerWei Waninventor

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Abstract

A hand-pulling drive mechanism for an industrial door is installed on a motor end cover of the motor. The mechanism includes a hand drive device to operate manually and a shaft connected with the hand drive device. The mechanism farther includes a gear pair to change an engagement state and a disengagement state, a rotation propelling device connected with the shaft, and an eccentric pulling device including a shaft pin placed on the shaft and a torsion jacket pivotally connected to the shaft and rotated relative to the shaft pin. The gear pair includes a drive gear sleeved on the shaft for switching between the two states, and a follower gear secured to a motor shaft. The rotation propelling device is moveably connected with the drive gear. The torsion jacket and the drive gear jointly move to pull the torsion jacket through eccentric rotation of the shaft pin when the shaft is rotated, so that the drive gear moves in an axial direction and the follower drive engages with and disengages from the drive gear.

Claims16

Dependent claims

A hand-pulling drive mechanism for an industrial door, the mechanism being installed on a motor end cover of a motor used to move the industrial door upward or downward, comprising a hand drive device for users to manually operate the mechanism and a shaft connected with the hand drive device, the hand-pulling drive mechanism further comprising:

a gear pair having an engagement state and a disengagement state, comprising a drive gear sleeved on the shaft to switch between the two states, and a follower gear secured to a motor shaft;
a rotation propelling device connected with the shaft to cause rotation of the drive gear, the rotation propelling device being moveably connected with the drive gear;
an eccentric pulling device comprising a shaft pin radially positioned on the shaft and a torsion jacket pivotally connected to the shaft and capable of rotate relative to the shaft pin, wherein the torsion jacket and the drive gear rotate together such that eccentric rotation of the shaft pin causes axial movement of the torsion jacket and the drive gear during rotation of the shaft, thereby leading to engagement and disengagement between the drive gear and the follower gear.

Dependencies are inferred from the claim text.