Patent ID: 8267615

Claim:
A connecting mechanism, comprising: a transmission shaft, the transmission shaft comprising a first threaded portion and a second threaded portion axially spaced from said first threaded portion, said transmission shaft further comprising an assembly groove extending axially from the first threaded portion through the second threaded portion; an adjustment member threadingly engaging the first threaded portion; a transmission member comprising a connecting hole extending therethrough, wherein the transmission shaft is received in said connecting hole, and wherein said connecting hole comprises a wedge-shaped receiving groove extending axially along a sidewall thereof; a wedge-shaped key partially received in the assembly groove of the transmission shaft, and partially received in the receiving groove of the transmission member, said key comprising a first end face and a second end face opposite said first end face; and a fastening member threadingly engaging the second threaded portion, and engaging the first end face of said key; wherein tightening the fastening member onto the second threaded portion drives the second end face of said key into said adjustment member.