| 摘要 |
1,271,144. Electrically-propelled vehicles; steering; suspensions. J. T. TRIPLETT. 7 May, 1969 [7 May, 1968], No. 23283/69. Headings B7H and B7D. [Also in Division F2] An electrically-propelled vehicle comprises a frame A, a pair of rear wheels C, and a steerable front wheel B driven by a motor D and mounted on an axle 27 carried by the lower of two circular angle-members 31, 32 defining therebetween a channel containing ball-bearings 33, the upper angle-member 31 being secured to the frame A and an endless cable 42 wrapped around a groove 41 in the lower angle-member 32 extending round pulleys 43, 44, 45 to a steering- wheel 14. Projections 35, 37 formed on the angle-members 31, 32 on opposite sides of the ball-bearings 33 prevent separation of the anglemembers, and a hole 38 for insertion of the ballbearings is closed by a screw 39. Stabilizing rollers 80 carried by a shaft 81 projecting from the frame A on opposite sides of the front wheel B are engageable with the ground if the vehicle tilts to prevent overturning. The rear wheels C are carried by an axle 56 positioned in longitudinal slots 58 by multiple flange members 59 which can be pivoted to allow repositioning of the axle by actuating a handle 62. An operator's platform 22 pivotally connected to the frame A is linked to brake shoes 68 engageable with the rear wheels C and loaded by a compression spring 70 so that the brakes are applied unless the operator's weight is exerted on the rear of the platform. The motor D is supported by braces 28 from the lower angle-member 32 and coupled to the front wheel B by a chain drive 49. Batteries 77 for energizing the motor D are carried in a removable battery pack E having a handle 79. A speed control member 15 is connected by a flexible cable to a switching device H which actuates three switches sequentially to apply voltage to the motor D in three stages by appropriate series and parallel connection of the batteries 77. A glass-fibre-reinforced plastics housing 16 mounted on the frame A carries a tub-shaped receptacle 82 located by protrusions which fit into corresponding indentations in the housing. A passenger seat may be substituted for the housing 12, a folding foot platform 84 being provided. |
