| 摘要 |
<p>1. Articulated two-wheeled manually drawn cart for transporting or handling goods, can be used on any kind of grounds, including stairs, made up of an upper frame (1) which carries the load, and an under frame (2) which ensures the mobility of the device and which, part from the two standard wheels (4) comprises two belts (5), either notched or smooth moving, facing the ground, around a rounded undeformable profile, this profile can be an arc of a circle, an ellipse, a section of a parabola or any other kind of rounded profile, and in case an arc of a circle is chosen, this section being part of a large diameter wheel, the two frames (1 and 2) being articulated round a common oscillation axis (3) allowing one frame to swiwel with regard to the other while the cart is moving, the belt (5) being retained to the rounded profile by roller supports (6) that prevent deformation of the belt when the cart touches an obstacle, characterized by the fact that the rounded profile is placed on the under frame (2), facing the ground, also by the fact that the common oscillation centre (3) of the two frames (1 and 2) is geometrically distinct from the axes of the wheels (4), the axes of the roller supports (6), and the axes of the running wheels (7) an by the fact that a multiple action spring system (8 and 9) ensures the following functions : a. It controls the moving of the under frame (2) and brings it constantly back to a suitable position with regard to the upper frame (1) and with regard to the obstacle to pass, b. It ensures the suspension of the load, c. It creates a distance between the two frames when the cart is brought into vertical position for loading.</p> |
