| 摘要 |
A number of improvements to lawn mowers having a blade rotating about a vertical axis are described. These include improvements to a height adjustment mechanism (Figs. 1-6), a cutting blade (Figs. 7-11), a height adjustable rear roller (Figs. 12-16), a folding handle (Figs. 17-21), a grass distribution system (Figs. 24-26) and a grass collecting box (Figs. 22-28). Of more general applicability are improvements to the electrical connection of batteries in battery powered mowers (Figs. 30-32). The height adjustment mechanism acts on all four wheels of the mower simultaneously. Each wheel (14,20, Fig. 1) is carried by a stub axle 17, 21 mounted on a pivot arm 15, 22. Each pivot arm pivots about axles 16, 23 which are mounted to the body of the mower and which extend across the width of the mower to connect together pivot arms located on opposite sides. A link arm 25 is pivotally coupled to the front and rear pivot arms on one side of the mower and a spring (26, Fig. 1) secured between the link arm and an axle biases the mower into a high position. The link arm is held at selected positions by means of a downwardly projecting indexing member 28 provided on the link arm which cooperates with an upwardly biased engaging member 29 mounted on the body of the mower. |
