Gate opening apparatus with gear assembly

A gate opening apparatus, comprising:

• a housing having a supporting portion pivotally connected to an external anchor, and a mounting portion extending toward a door gate, the housing having a receiving cavity and an engagement slot communicating the receiving cavity with an exterior of the housing;
• a motor received in the receiving cavity of the housing, the motor being configured as a synchronous motor;
• a gear assembly, which comprises:
• a gear rod having one end connected to the motor without connecting through any clutching device, and another end extending in the receiving cavity toward the mounting portion of the housing, the gear rod having a plurality of first teeth spirally formed thereon;
• and
• a driven member connecting to the door gate, the driven member comprising an engagement body and having a plurality of second teeth forming on the engagement body and engaging with the first teeth of the gear rod, in such a manner that when the gear rod is driven to rotate, the driven member is arranged to move along a longitudinal direction of the housing, the engagement body having a through hole, wherein the second teeth are formed on a circumferential boundary of the through hole, the gear rod being arranged to pass through the through hole, in such a manner that the first teeth are arranged to engage with the second teeth, so that when the gear rod is driven to rotate, the engagement body is driven to move along the longitudinal direction of the gear rod, the driven member further comprising a coupling arm pivotally connecting the engagement body to the door gate so that when the engagement body is driven to move along the gear rod, the coupling arm is arranged to transmit a mechanical force to the door gate and to pivotally open or close the door gate with respect to the external anchor;
• and
• a range adjustment mechanism which comprises a sliding track mounted on the top side of the housing, and a first and a second adjustment sliders slidably mounted on the sliding track, the first adjustment slider and the second adjustment slider being spaced apart from each other on the sliding track, wherein a distance between the first adjustment slider and the second adjustment slider dictates a range of motion on the driven member;
• the motor being arranged to drive the gear assembly to rotate, in such a manner that when the motor is connected to a power source, the motor is arranged to possess a predetermined amount of mechanical resistance so as to prevent users from manually actuating the motor for opening or closing the door gate;
• the gate opening apparatus being arranged to be selectively operated between a power mode and a manual mode, wherein in the power mode, the motor is electrically activated to drive the gear rod to rotate so as to drive the driven member to move along a longitudinal direction of the housing for driving the door gate to move in a pivotal manner with respect to the external anchor, wherein in the manual mode, the motor is cut off from electricity and is arranged to exert minimal mechanical resistance so that a user is able to manually move the door gate for opening or closing thereof.