| 摘要 |
A lawn mower comprising a cutting deck (2) mounted on at least one castor wheel assembly (4) and a wheel alignment mechanism (30, 38) for orientating the direction of travel of the castor wheel assembly (4) characterised in that the wheel alignment mechanism (30, 38) comprises a cam mechanism which orientates the castor wheel assembly (4) to and holds it in a predetermined position when operated. The wheel alignment mechanism (30, 38) comprises a first part mounted on the deck (2) and a second part mounted on the castor wheel assembly (4), a cam (30) mounted on one part which is rotatable relative to an abutment surface (56) mounted on the other part, the direction of travel of the castor wheel assembly (4) being dependent on the relative orientation of the cam (30) and abutment surface (56) wherein the abutment surface (56) is movable relative to the cam (30) is able to freely rotate relative to the abutment surface (56), and a second position where the cam (30) is held in a predetermined angular orientation relative to the abutment surface (56) by the abutment surface (56), the abutment surface (56) engaging and angularly orientating the cam (30) relative to the abutment surface (56) into the predetermined angular position during its movement from the first position to the second position. <IMAGE> |
