| 摘要 |
In order to render a wheeled vehicle, particularly an infant's pushchair, more stable on uneven ground, front and rear pairs of wheels are mounted on pivotal axes and a mechanical connection between the two axles translates pivotal movement of the front axis into opposite pivotal movement of the rear axis. If, for example, the left-hand front wheel rides-up over a bump as compared to the right-hand front wheel, then the right-hand ear wheel is causes to ride-up and the left-hand rear wheel is driven down which compensates the tendency of the pushchair to tilt in response to the riding-up of the left-hand front wheel. Various different mechanical connections are disclosed including linkages of different kinds and interconnecting gears. Application to lawnmowers, hand carts, supermarket trolleys, wheelbarrows etc is disclosed, and also to tables and the like where compensation for uneven ground is required. |
