| 摘要 |
The device comprises a frame (1a) mounted via a suspension (4a) on an axle (2) common to a pair of wheels, and a braking element actuated by a brake pedal and capable of braking the rotation of at least one wheel. The brake pedal (12, 13) is mounted so as to be fixed in rotation on the axle (2). The suspension element (4a) is mounted in the vicinity of the wheel (3a) about a cam (11a) integral with the axle (2), and comprises a braking member (9a). The wheel (3a) comprises a drum brake (15a) integral with the wheel and capable of interacting, at its periphery, with the corresponding braking member (9a) when the axle (2) is driven in rotation in a first direction by acting on the brake pedal (12), thus causing the braking member (9a) to be brought nearer to and into contact with the periphery of the brake drum (15a). The same action is controlled simultaneously on the other wheel of the axle (2).
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