Patent ID: 8276881
Filing Date: 2012-10-02
Classification: B66F

Abstract:
1. A lifting mechanism with self-locking function, comprising: a bed; a guide section for linear reciprocal motion; an ascending/descending seat mounted on and guided by the guide section to up and down reciprocally move in the direction of Z-axis; a rocking member with a predetermined length, a first end of the rocking member being pivotally connected to the ascending/descending seat; a drive section having a power output terminal connected to a second end of the rocking member for driving the rocking member to pivotally move between an ascending position and a descending position, when positioned in the ascending position, the length of the rocking member being parallel to Z-axis, while when positioned in the descending position, the length of the rocking member and the Z-axis containing a predetermined angle; and a prestressing section for changing sliding friction of the guide section, wherein the guide section includes two elongated Z-axis guide members disposed on the bed and spaced in parallel to each other, the ascending/descending seat being bridged between the Z-axis guide members, the guide section further including an elongated horizontal guide member horizontally disposed on the bed between bottoms of the Z-axis guide members; wherein the guide members are cross roller ways, each of the guide members having two parallel pairs of elongated guide rails, a first guide rail of each pair of guide rails having a side face adjacent to a side face of a second guide rail of the pair of guide rails, two roller sets being held between the adjacent side faces of the first and second guide rails of the two pairs of guide rails, whereby the first and second guide rails can be slid relative to each other.