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Mini scooter

Imported: 24 Feb '17 | Published: 06 Jan '04

Yuan-Fen Chung

USPTO - Utility Patents

Abstract

A mini scooter includes a wheel member, a wheel support member, a steering rod, a steering rod support, a wheel cover plate, and a pedal. The wheel member includes a wheel with a transmission ring in the center, and a unidirectional rotary bearing, a pivot shaft of which serves as a wheel axle. Two ends of the wheel axle are respectively provided with cover plates. The cover plates are connected to the transmission ring. The wheel support member includes a wheel support with a top portion having a through hole and having an inverted U-shaped cross section. Securing bolts extend through through holes in the wheel support and engage with nuts. Two ends of the bearing pivot shaft are provided with axle bearings. Two sides of the wheel support respectively form circular holes for receiving the axle bearings. The wheel cover plate is disposed on and secured to the securing bolts in the through holes in the wheel support. The wheel cover plate has a top portion provided with front and rear stop blocks. A rear end of the wheel cover plate is connected to the pedal. The steering rod support includes a steering rod upper support and two steering rod side supports connected to two ends of the wheel axle and disposed on outer sides of the wheel support. Two steering rod side supports are respectively connected to the steering rod upper support. The steering rod is secured on a top portion of the steering rod upper support at a middle position such that when the steering rod swings forward and rearward, the swinging angles are limited within a range defined by the front and rear stop blocks.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other features and advantages of the present invention will be more clearly understood from the following detailed description and the accompanying drawings, in which,

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of major components of a unidirectional rotary bearing body of the present invention;

FIG. 3 is an exploded view of the major components of another unidirectional rotary bearing;

FIG. 4 is an assembled perspective view of the unidirectional rotary bearing body of the invention and a wheel;

FIG. 5 is a schematic view illustrating clockwise rotation of the unidirectional rotary bearing body of the invention;

FIG. 6 is a schematic view illustrating that counterclockwise rotation of the unidirectional rotary bearing body of the invention drives a transmission ring to rotate therewith;

FIG. 7 is a schematic view illustrating clockwise rotation of another unidirectional rotary bearing body of the invention

FIG. 8 is a schematic view illustrating counterclockwise rotation of another unidirectional rotary bearing body of the invention, which drives a transmission ring to rotate therewith;

FIG. 9 is an exploded view of assembly of a wheel support of the invention;

FIG. 10 is an assembled perspective view of the wheel support of the invention;

FIG. 11 is an exploded view of assembly of the wheel support and a wheel;

FIG. 12 is an assembled perspective view of the wheel support;

FIG. 13 is a perspective view of assembly of the wheel support of the invention and a wheel;

FIG. 14 is an exploded view of assembly of the wheel, a wheel cover plate and a platfoam of the mini scooter of the invention;

FIG. 15 is an assembled perspective view of the assembly of the wheel, the wheel cover plate and the platfoam of the mini scooter;

FIG. 16 is an exploded view of assembly of steering rod left and right side supports and a wheel axle;

FIG. 17 is an exploded view of a final assembly of the invention;

FIG. 18 is an assembled perspective view of the final assembly;

FIG. 19 is a side view of the final assembly;

FIG. 20 is a front view of the final assembly;

FIGS. 21A,

21B and

21C are schematic top views of the invention when connecting type return springs are employed to rotate the wheel;

FIG. 22 is a perspective view showing the final assembly of the invention employing a linking type return spring;

FIG. 23 is a perspective view of the linking type return spring of the invention;

FIGS. 24A,

24B and

24C are schematic top views of the invention when the linking type return spring is employed to rotate the wheel;

FIG. 25 is a schematic perspective view showing rotation of the wheel;

FIG. 26 is an exploded view of assembly of the wheel support and transmission gears of the invention;

FIG. 27 is an exploded view of assembly of the wheel support, the wheel, and force-outputting gears of the invention;

FIG. 28 is an assembled view of the assembly of the wheel support, the gears and the wheel of the invention;

FIG. 29 is an exploded view of the assembled wheel and the assembled wheel cover plate and the platform of the mini scooter of the invention;

FIG. 30 is an assembled perspective view of the assembled wheel, the wheel cover plate and the platform of the mini scooter of the invention;

FIG. 31 is an exploded view of assembly of the steering rod support and force-inputting gears of the invention;

FIG. 32 is an exploded view of the assembled wheel, the steering rod support and the steering rod;

FIG. 33 is an assembled perspective view of a final assembly of the invention and additional speed change gears;

FIG. 34 is an assembled side view of a final assembly of the invention and additional speed change gears;

FIG. 35 is a front view of a final assembly of the invention and additional speed change gears;

FIG. 36 is a schematic perspective view illustrating operation of the final assembly with the speed change gears, in which the relative distances are enlarged; and

FIG. 37 is a schematic perspective view illustrating operation of the final assembly with the speed change gears, in which the relative distances are enlarged.

Claims

1. A mini scooter comprising: a wheel member, a wheel support member, a steering rod, a steering rod support, a wheel cover plate, and a platform, wherein:

2. The mini scooter as claimed in claim 1, wherein said cover plate and said transmission ring are connected via securing bolts.

3. The mini scooter as claimed in claim 1, wherein balls are provided between said through hole in said wheel support and said securing bolt, and a ball cover plate is fitted on said securing bolt, is disposed on an upper end of said wheel support, and has said securing bolt extending therethrough for engagement with said nut.

4. The mini scooter as claimed in claim 1, wherein said wheel support has curved recesses at two lateral bottom portions thereof, securing plates with curved recesses being secured to the lateral bottom portions of said wheel support via securing bolts, said curved recesses of said wheel support and said curved recesses of said securing plates forming said circular holes for receiving said axle bearings.

5. The mini scooter as claimed in claim 1, wherein said steering rod side supports and said steering rod upper support are connected via bolts.

6. The mini scooter as claimed in claim 1, wherein said bearing pivot shaft has middle portion with an outer side provided with a recess, the recess receives a rotary pin.

7. The mini scooter as claimed in claim 1, wherein said bearing pivot shaft has a middle portion with an outer side provided with a groove, said groove accommodating a spring and a braking plate therein, said transmission ring having a serrated groove.

8. The mini scooter as claimed in claim 1, wherein two sides of said steering rod upper support and two lateral bottom portions of said wheel cover plate are respectively provided with securing bolts, two connecting type return springs respectively engaging and pulling said securing bolts on the two sides of said steering rod upper support and said securing bolts on the lateral bottom sides of said wheel cover plate such that when said steering rod swings forward, said connecting type return springs provide a rearward pulling predetermined force.

9. The mini scooter as claimed in claim 1, wherein two lateral bottom portions of said wheel cover plate are respectively provided with securing bolts, a linking return spring winding around said steering rod, a spring portion of said linking return spring winding around said securing bolt on said wheel cover plate, two tail ends of said linking return spring fastening and pressing said platform to generate a predetermined force such that, when said steering rod swings forward, said linking return spring will be subjected to a force and will hence generate a predetermined force, and when said steering rod rotates leftward and rightward, said linking return spring will not increase the predetermined force, and the largest angles of the leftward and rightward rotation will be determined by the size of clearance when said wheel cover plate abuts against internal groove of said steering rod support when the latter rotates.

10. The mini scooter as claimed in claim 1, wherein two lateral sides of said wheel support are respectively provided with through holes, said through holes respectively accommodating transmission gear bearings, said transmission gear bearing being fitted with a transmission gear, said wheel support, said transmission gear bearing and said transmission gear being interconnected via bolts and nuts, two ends of said wheel axle being respectively connected to force-outputting gears via securing pins, force-inputting gears being secured on said two steering rod side supports via bolts, said force-inputting gears cooperating with said transmission gears, said transmission gears cooperating with said force-outputting gears.

11. The mini scooter as claimed in claim 10, wherein said force-inputting gears, said transmission gears and said force-outputting gears are formed from a plastic material and are configured to have teeth or to be cylindrical and in tight contact.