US 2003/0227154 A1Published application

Hand-pull powered scooter

OwnerJen-Hsien Yoinventor

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Abstract

A hand-pull powered scooter comprises a platform body, the front end of which is connected with a headtube shaft; an actuation bar pivotally located at the top of the headtube shaft for swinging movement; a frontfork an upper end of which is inserted into said headtube shaft, a lower end of which is rotatbly pivoted to a front wheel; a gearbox, which includes a plurality of shafts, a plurality of unidirectional gears supported on said shafts, and reduction gears set provided below the platform body; a pair of rear wheels which are rotatably supported on the shaft of the end gear of the gearbox. The lower end of the actuation bar moves a horizontal rack in reciprocative movement via the ends of a plurality of connecting rods. The forward stroke of rack drives a uni-directional gear, and the backward stroke another reverse uni-directional gear, and the rack also drives the end gear in both strokes and both directions.

Claims10

Dependent claims

A hand-pull powered scooter 1, comprising:

a platform body 10, a front end of which is connected with a headtube shaft 20;
an actuation bar 50, a lower end of which pivotally locates at the top of the headtube shaft 20 for swinging movement;
a frontfork 30, an upper end of which is inserted into said headtube shaft 20, and a lower end of which is rotatably pivoted to a front wheel 40;
a gear box 60, which includes a plurality of shafts 61a, 61b, 61c, 61d, a plurality of unidirectional gears 62a, 62b supported on the shafts, and a plurality of reduction gears 63a, 63b, 63c, 63d, and end gear 64, provided below the platform body 10;
a pair of rear wheels 80 which are rotatably supported on the shaft 61d of the end gear 64 of the gearbox 60;
characterized in that:
the lower end of the actuation bar 50 moves together with a horizontal rack 75 in reciprocative movement via the ends of a plurality of connecting rods 71, 72, 73, 74;
moreover, during the reciprocative movement of the horizontal rack 75 caused by the swinging of said actuation bar, the forward stroke of rack 75 drives a unidirectional gear 62a, the backward stroke another unidirectional gear 62b, and the movement of the rack 75 also drives the end gear 64 in both strokes and both directions through reduction gears 63a, 63b, 63c, 63d, so as to accelerate the rear wheels forward continuously.

5 more elements

A hand-pull powered scooter 1, comprising:

a platform body 10 which is mounted on a pair of longitudinal parallel ribs 11, and the front end of which is connected with a headtube shaft 20;
a frontfork 30, an upper end of wich is pivoted and rotates within said headtube shaft 20, and a lower end of which is rotatably pivoted to a front wheel 40;
an actuation bar 50, an upper end of which comprises a handbar 52, and a lower end of which comprises a universal joint 54 provided at its lower end pivotally located at the top of the headtube shaft 20 for swinging movement;
a gear box 60, which includes a plurality of shafts 61a, 61b, 61c, 61d, a plurality of unidirectional gears 62a, 62b supported on the shafts, and a plurality of reduction gears 63a, 63b, 63c, 63d and an end gear 64, and the front end of which gearbox 60 is pivotally mounted on the parallel ribs 11, middle portion of which gearbox 60 is supported below the parallel ribs 11 via a damping spring 68;
and
a guide slot 65 which is provided at the top wall of said gearbox 60;
a plurality of connecting rods 71, 72, 73, 74, in which the first connecting rod 71 is connected at the lower end of said actuation bar 50, while the last connecting rod 74 is connected to a horizontal rack 75, and said horizontal rack 75 is inserted within the guide slot 65 of the gearbox 60, with its teeth meshed with unidirectional gear 62a and a reverse unidirectional gear 62b;
a pair of rear wheels 80 which are rotatably supported on the axle 61d of the end gear 64 of the gearbox 60.

5 more elements

Dependencies are inferred from the claim text.