GB2334154A - Electricity generation for pedalled vehicles - Google Patents

Electricity generation for pedalled vehicles Download PDF

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Publication number
GB2334154A
GB2334154A GB9802026A GB9802026A GB2334154A GB 2334154 A GB2334154 A GB 2334154A GB 9802026 A GB9802026 A GB 9802026A GB 9802026 A GB9802026 A GB 9802026A GB 2334154 A GB2334154 A GB 2334154A
Authority
GB
United Kingdom
Prior art keywords
spindle
generator
tread portion
pedal
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9802026A
Other versions
GB2334154B (en
GB9802026D0 (en
Inventor
Richard Banfield Hicks
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INVENTIVE STEP Ltd
Pedalite Ltd
Original Assignee
INVENTIVE STEP Ltd
Pedalite Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INVENTIVE STEP Ltd, Pedalite Ltd filed Critical INVENTIVE STEP Ltd
Priority to GB9802026A priority Critical patent/GB2334154B/en
Publication of GB9802026D0 publication Critical patent/GB9802026D0/en
Priority to US09/241,511 priority patent/US6104096A/en
Priority to CN99802609A priority patent/CN1106311C/en
Priority to KR1020007008398A priority patent/KR20010040533A/en
Priority to JP2000530011A priority patent/JP2002501858A/en
Priority to EP99902717A priority patent/EP1053167B1/en
Priority to RU2000122775/11A priority patent/RU2234437C2/en
Priority to PCT/GB1999/000347 priority patent/WO1999038758A1/en
Priority to AU22925/99A priority patent/AU741184B2/en
Priority to CA002318841A priority patent/CA2318841C/en
Priority to NZ506611A priority patent/NZ506611A/en
Priority to DE69912243T priority patent/DE69912243T2/en
Priority to AT99902717T priority patent/ATE252480T1/en
Priority to DK99902717T priority patent/DK1053167T3/en
Publication of GB2334154A publication Critical patent/GB2334154A/en
Application granted granted Critical
Publication of GB2334154B publication Critical patent/GB2334154B/en
Priority to HK01105931A priority patent/HK1036037A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/06—Arrangement of lighting dynamos or drives therefor
    • B62J6/10—Gear drives
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/0094—Structural association with other electrical or electronic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/06—Arrangement of lighting dynamos or drives therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/06—Arrangement of lighting dynamos or drives therefor
    • B62J6/14—Belt drives
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1861—Rotary generators driven by animals or vehicles

Abstract

A generator 3 mounted within the tread portion 2 of a pedal 20 of a bicycle or the like is driven via pulleys 4 and 5 of unequal diameter and a gear box 7 so that the speed of rotation of the rotor of the generator is a multiple of the speed of relative rotation between the spindle 1 of the pedal and the tread portion 2 when the latter is held horizontal by a foot resting on it and the crank (not shown) from which the spindle 1 extends is rotated to propel the bicycle. The gearing up of the generator enables sufficient output voltage to illuminate an array 9 of LEDs and charge a capacitor 8 which will keep them illuminated while the pedal is temporarily stationary.

Description

"ELECTRICITY GENERATION FOR PEDALLED VEHICLES" This invention relates to electricity generation for pedalled vehicles and ucre particularly to improvements in the generation of electricity by pedal power and its use in contributing to road safety.
Pedalled vehicles such as bicycles are particularly vulnerable to road accidents not only because they offer little or no pratection to the rider but primarily because the drivers of other vehicles my not see them, especially in the dark or poor weather additions. It is of course mandatory in itost cxxmtries for bicycles to use lights in the dark and not are equipped with reflectors, but conventional lighting systems leave march to be desired. If lighting is by dry batteries these may fail or the rider my simply fail to turn tbem on. The drawbacks of conventional generators, either incorporated in a wheel hub or driven by a tyre, include the fact that they make pedalling harder, which is a disincentive to using therm, and that the illumination they provide ceases as soon as the bicycle stops, representing a considerable danger e.g. when the bicycle is waiting at traffic lights or at a road junction. Reflectors are of course only effective when illuminated by the @ncoming vehicle, which will not occur if the latter has no adequate lights or is approaching at an angle.
In recent years LEDs (light emitting diodes) have been used either instead of or to supplement light bulbs. Taking advantage of their relatively low power consultion it is practicable to have than permanently in use, even in daylight. Flashing 1EDs attract attention and it has been appreciated that it is particularly advantageous to mount than upon the pedals. Their rotary motion attracts attention and moreover an oncoming driver can judge his orientation relative to the bicycle by whether the rotating LEDs describe a circle (when at right angles) a vertical line (when in front or behind) or an elipse when approaching at an angle. Direction can of course be judged by the colour of the visible Reds, usually red indicating the rear of the bicycle and a white or green light indicating that it is approachLng.
While the use of LEDs on the pedals of a bicycle is highly advantageous, if their power is derived from a dry battery this my fail unbeknownst to the rider and in any event the use of dry batteries is undesirable if it can be avoided both because of their high cost and the environmental problems associated with their disposal.
Japanese Patent Publication No. 07291174A and United States Patent No.
5662405 prcpose the modification of a bicycle pedal to serve as a generator of electricity to illuminate LEDs mounted on the frame or tread portion of the pedal. Permanent magnets are attached to the pedal shaft or spindle and the pedal frame or tread portion is provided with windings or solenoids and relative rotation between the permanent magnets and the windings as relative rotation occurs ke*ween the pedal spindle and tread portion generates current by magnetic lixiuction on the sane principles as in the case of a conventional bicycle dynamo.
The voltage generated by an inductance generator is a function of the number of windings of the stator and the speed of rotation of the rotor. The essential weakness of a system such as described in the said Japanese patent publication resides in the relatively very low speed of rotation of the rotor or spindle under normal circumstances. A pedal spindle will rotate only once relative to the tread portion or frame mounted upon it for every revolution of the crank on which the spindle is mounted. A cyclist typically will pedal at between 30 and 60 revolutions of the pedal crank per minute. Japanese Patent publication No. 07291174A recognizes this problem but the only solution proposed is to increase the number of windings. The present Applicants have calculated that this is ixrpracticable because it would increase unacceptably the cost and/or size of the stator carpent, bearing in mirwi that this is to be incorporated in the tread portion of a pedal.
Another disadvantage of using the pedal spindle itself as the rotor is that it, and the associated bearings, will be subjected to the wear and abuse in service which pedal spindles usually experience. It is preferable that the relatively delicate and accurate bearings of a generator should not be directly exposed to such treatment.
A principal object of the present invention is to improve upon the proposals of the said Japanese Patent publication and offer solutions to the problems associated therewith.
In accordance with the invention there is provided electricity generating apparatus for a vehicle equipped with pedals, such as a bicycle, 'wherein at least one said pedal comprises a spindle and a tread portion relatively rotatable about the spindle, electicity generating means mounted upon the tread portion and transmission means between the spindle and generator such that for each revolution of the spindle relative to the tread portion the generator undergoes more than one revolution.
Preferably the rotor of the generator is rotatably mounted within the tread portion to rotate about an. axis generally parallel with that of the spindle and the generator preferably comprises stator means generally parallel with the spindle and stationary relative to the tread portion.
The transmission means may drive the rotor of the generator via gears at one end of the generator stator.
The transmission means may comprise meshing gear wheels of unequal diameter one of which is stationary relative to the spindle and the other of which drives the rotor of the generator or it my comprise pulleys of unequal diameter one of which is stationary relative to the spindle and the other of which drives the rotor of the generator, said pulleys being connected by an endless belt. The ratio of said gear wheels or of said pulleys is preferably of the order of 2:1.
The said gears are preferably included in a gear b which has a 5:1 output ratio.
The generator and gear b may be arranged in longitudinal alignment within the tread portion on one side of the spindle and a capacitor may be arranged within the tread portion on the opposite side of the spindle, the capacitor being arranged to store electricity generated by the generator.
One or more arrays of LEDs may be mounted on the tread portion and arranged to be energised by electricity generated by the generator. LEDs exposed to view at one side of the tread portion may differ from lEDs exposed at the opposite side of the tread portion and the weight of the tread portion my be different on opposite sides of the spindle such that it adopts a nonhorizontal attitude before a foot is placed upon it. Alternatively, or in addition, the underside of the tread portion my have an outward projection.
In this way a cyclist can determine whether a pedal tread portion is the right way round or not (i.e. to offer the carrect TRn displays in the correct directions) when puting a foot on it. The said difference between the LEDs may be one of colour, nuneer, distribution or any connination of these.
The arrangement is preferably such that the generator has an output of approximately 2 volts when relative rotation between the spindle and tread portion is 30 rp.
A preferred eetxxislent of the invention will now be described with reference to the accompanying Drawings, in which: Figure 1 is a longitudinal section through a bicycle pedal assembly in accordance with the Present invention, Figure 2 is a sectional elevation taken on the line II-II of Figure 1, and Figure 3 is a sectional elevation taken on the line III-III of Figure 1.
The bicycle pedal 20 illustrated in Figure 1 is designed to extend at one end 21 fran a crank (not shown) of a bicycle. As is wall knawn per se the bicycle has a second crank similarly equipped with a pedal at 180 to the first, and by placing one foot on each pedal and rotating the cranks the cyclist propels the machine. The pedal comprises a shaft or spindle 1 which will be stationary relative to the associated crank and upon which is mounted a frame or tread portion 2 to be relatively rotatable by means of bearings 22 and 23. With a cyclists' foot resting on it the tread portion 2 will be held in a horizontal attitude and so for each full revolution of the crank there is one full revolution of the spindle 1 relative to tread portion 2. As so far described the pedal 20 is conventional so that no further description is considered necessary.
In accordance with the present invention, however, there is disposed at the distal end of the spindle 1 and stationary with respect thereto a pulley 4 which is connected by an endless belt 6 to a smaller pulley 5 with a ratio of 2:1. The pulley 5 is at one end of and drives the gears of a gear box 7 which in turn drives the rotor of a generator 3, the gear box having the effect that the rotor of the generator 3 is rotated at five times the speed of the pllley 5. The assembly of gear box 7 and generator 3 is a proprietary product readily available on the market so that no further description thereof is considered necessary. It is hosed within the tread 2 on one side of the spindle 1. Housed in the tread 2 on the opposite side of the spindle is a capacitor 8 which is arranged to store electricity generated by the generator 3 sO as to continue to energise an array 9 of LEDs, if for only a short time, after the generator ceases to rotate either because the bicycle is stationary or because the cyclist is free-wheeling.
It will be seen that by this aLLX3.L for each full rotation of the crank, and with the tread 2 held horizontal by a foot placed upon it, there will be one full revolution of the pulley 4 relative to the tread 2 and in consequence the rotor of the generator will be rotated at a speed which is a multiple of the speed of rotation of the crank, typically 300 rpm when the rate of rotation of the crank is between 30 and 60 rpn. A speed of rotation of the rotor of the generator of 300 rpm is sufficient to output 2 volts or more, this being the minimum required simultanecusly to energise the Tins 9 and charge the capacitor 8.
The array 9 of LEDs is housed in a lens 13 at the distal end of the pedal tread portion 2 and mirrored surfaces 12 within the lens are arranged to project light beams in the fore and aft direction as well as laterally outwardly of the bicycle. m In acecrdbnce with an optional feature of the invention the light knitted rearwardly is red and the light emitted forwardly and laterally is a different colour, so that the drivers of other vehicles will know in which direction the bicycle is travelling. To prevent placing a foot on the pedal with the tread the wrong way round (i.e. so that red light shows forward) the pedal has a projection 15 on its underside which will alert a rider if he places his foot on it and/or the assembly 37 is of greater weight than the capacitor 8 so that the pedal assumes a non-horizontal attitude when there is no foot upon it. When msunting the bicycle the rider will know that the pedal should be tilting backward rather than forward before placing a foot upon it.
It will be evident that both pedals of the same bicycle or other pedal driven or pedal equipped vehicle my similarly be provided with electricity generating and/or capacitor and/or lED means. It will also be evident that the electricity generated by the generator 3 might be used instead or additionally to energies some other device such as a sanic slant.
The present invention provides for the first tine a practicable way of achieving that a bicycle or the like will be provided witch a lighting or other alarm or alerting system which dees not rely either upon batteries or upon the rider remembering to switch it on. The system is an in-built and foolproof safety feature which could be made mandatory for bicycles without unacceptably increasing their cost or having implications for the envirament such as arise from the use of batteries. A further advantage is that pedals according to the invention my be offered as replacement or "retro fit" items, so that existing machines can be equipped with them at little cost as well as new ones.

Claims (16)

  1. CLAIMS: 1. Electricity generating apparatus for a vehicle equipped with pedals, such as a bicycle, wherein at least one said pedal comprises a spindle and a tread portion relatively rotatable about the spindle, electricity generating means mounted upon the tread portion and tranrrission means between the spindle and generator such that for each revolution of the spindle relative to the tread portion the gesE3nstar unde5~Fe3 mLre than one revolution.
  2. 2. Apparatus as claimed in claim 1, wherein the rotor of the generator is rotatably mounted within the tread portion to rotate about an axis generally parallel with that of the spindle.
  3. 3. Apparatus as claimed in either proeding claim, wherein the generator cc=Frises stator means generally parallel with the spindle and stationary relative to the tread portion.
  4. 4. Apparatus as claimed in any one of the preceding claims, wherein the transmis8ion means drives the rotor of the generator via gears at one end of the generator stator.
  5. 5. Apparatus as claimed in any one of the preceding claims, wherein the transmission means comprises meshing gear wheels of unequal diameter one of which is stationary relative to the spindle and the other of which drives the rotor of the generator.
  6. 6. Apparatus as clainied in any one of claims 1 - 4, wherein the tsansadssion means ccmprises pulleys of unequal diameter one of which is stationary relative to the spindle and the other of which drives the rotor of the generator, said pulleys being connected by an endless belt.
  7. 7. Apparatus as claimed in claim 5 or claim 6 wherein the ratio of said gear wheels or of said pllleys is of the order of 2:1.
  8. 8. Apparatus as claimed in claim 7 as appendant to claim 4, wherein the gears are included in a gear box which has a 5:1 output ratio.
  9. 9. ratus as claimed in claim 8, wherein the generator and gear box are arranged in longitudinal alignment within the tread portion on one side of the spindle and a capacitor is arranged within the tread portion on the opposite side of the spindle, the capacitor being arranged to store electricity generated by the generator.
  10. 10. Apparatus as claim in any one of the preceding claims and comprising one or more arrays of LEDs mounted on the tread portion and arranged to be energised by electricity generated by the generator.
  11. 11. ratus as ciaimd in claim 10 as appendant to claim 9, wherein Tins exposed to view at one side of the tread portion differ fran TRns exposed at the opposite side of the tread portion and wherein means is provided to enscurage the selection of a particular orientation of the pedal when a foot is placed upon it.
  12. 12. Apparatus as claimed in claim 11 wherein the said difference is in colour, number and/or distribution.
  13. 13. Apparatus as ciaiired in claim 11 or claim 12, wherein the weight of the tread portion is different on apposite sides of the spindle such that it adopts a ncn-horizontAl attitude before a foot is placed upon it.
  14. 14. Apparatus as claimed in any one of claims 11 - 13, wherein the underside of the pedal has a projection.
  15. 15. Apparatus as claimed in any one of the preceding claims wherein the arrangement is such that the generator has an output of approximately 2 volts when relative rotation between the spindle and tread portion is 30 rpm.
  16. 16. Electricity generating apparatus for a vehicle equipped with pedals, such as a bicycle, substantially as hereinbefore described with reference to and as shown in the accarpanying Drawings.
GB9802026A 1998-02-02 1998-02-02 Electricity generation for pedalled vehicles Expired - Fee Related GB2334154B (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
GB9802026A GB2334154B (en) 1998-02-02 1998-02-02 Electricity generation for pedalled vehicles
US09/241,511 US6104096A (en) 1998-02-02 1999-02-01 Electricity generation for pedalled vehicles
AU22925/99A AU741184B2 (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
DE69912243T DE69912243T2 (en) 1998-02-02 1999-02-02 ELECTRIC GENERATOR FOR PEDAL VEHICLES
JP2000530011A JP2002501858A (en) 1998-02-02 1999-02-02 Power generation for pedal vehicles
EP99902717A EP1053167B1 (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
RU2000122775/11A RU2234437C2 (en) 1998-02-02 1999-02-02 Electric current generator for pedal operated vehicles
PCT/GB1999/000347 WO1999038758A1 (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
CN99802609A CN1106311C (en) 1998-02-02 1999-02-02 Electricity generatior for pedalled vehicles
CA002318841A CA2318841C (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
NZ506611A NZ506611A (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
KR1020007008398A KR20010040533A (en) 1998-02-02 1999-02-02 Electricity generation for pedalled vehicles
AT99902717T ATE252480T1 (en) 1998-02-02 1999-02-02 ELECTRIC GENERATOR FOR PEDAL VEHICLES
DK99902717T DK1053167T3 (en) 1998-02-02 1999-02-02 Manufacture of electricity for pedal-driven vehicles
HK01105931A HK1036037A1 (en) 1998-02-02 2001-08-22 Electricity generation for pedalled vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9802026A GB2334154B (en) 1998-02-02 1998-02-02 Electricity generation for pedalled vehicles

Publications (3)

Publication Number Publication Date
GB9802026D0 GB9802026D0 (en) 1998-03-25
GB2334154A true GB2334154A (en) 1999-08-11
GB2334154B GB2334154B (en) 2000-04-05

Family

ID=10826178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9802026A Expired - Fee Related GB2334154B (en) 1998-02-02 1998-02-02 Electricity generation for pedalled vehicles

Country Status (15)

Country Link
US (1) US6104096A (en)
EP (1) EP1053167B1 (en)
JP (1) JP2002501858A (en)
KR (1) KR20010040533A (en)
CN (1) CN1106311C (en)
AT (1) ATE252480T1 (en)
AU (1) AU741184B2 (en)
CA (1) CA2318841C (en)
DE (1) DE69912243T2 (en)
DK (1) DK1053167T3 (en)
GB (1) GB2334154B (en)
HK (1) HK1036037A1 (en)
NZ (1) NZ506611A (en)
RU (1) RU2234437C2 (en)
WO (1) WO1999038758A1 (en)

Cited By (4)

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GB2389465A (en) * 2002-06-07 2003-12-10 Far Great Plastics Ind Co Ltd Geared generator for skateboard
WO2008032346A1 (en) * 2006-09-12 2008-03-20 Alfredo Agozzino Electrical power supply
NL1034664C2 (en) * 2007-03-13 2009-04-27 Dosun Solar Technology Co Luminous pedal for a bicycle.
FR3029167A1 (en) * 2014-12-01 2016-06-03 Connected Cycle CONNECTED PEDAL

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US6876096B2 (en) * 2001-02-20 2005-04-05 Deon John Du Plessis Electrical power generation unit
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CN104913774B (en) * 2014-03-10 2018-01-30 昆山研达电脑科技有限公司 Outdoor exercises navigator application of function automatic start up system and its method
JP6699036B2 (en) * 2016-02-29 2020-05-27 株式会社ミツバ Bicycle pedal light device and bicycle
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2389465A (en) * 2002-06-07 2003-12-10 Far Great Plastics Ind Co Ltd Geared generator for skateboard
WO2008032346A1 (en) * 2006-09-12 2008-03-20 Alfredo Agozzino Electrical power supply
NL1034664C2 (en) * 2007-03-13 2009-04-27 Dosun Solar Technology Co Luminous pedal for a bicycle.
FR3029167A1 (en) * 2014-12-01 2016-06-03 Connected Cycle CONNECTED PEDAL
WO2016087740A1 (en) * 2014-12-01 2016-06-09 Connected Cycle Connected pedal

Also Published As

Publication number Publication date
CN1106311C (en) 2003-04-23
ATE252480T1 (en) 2003-11-15
RU2234437C2 (en) 2004-08-20
AU741184B2 (en) 2001-11-22
JP2002501858A (en) 2002-01-22
CA2318841A1 (en) 1999-08-05
DE69912243T2 (en) 2004-07-15
EP1053167A1 (en) 2000-11-22
CA2318841C (en) 2004-11-30
NZ506611A (en) 2003-05-30
DE69912243D1 (en) 2003-11-27
EP1053167B1 (en) 2003-10-22
HK1036037A1 (en) 2001-12-21
US6104096A (en) 2000-08-15
KR20010040533A (en) 2001-05-15
WO1999038758A1 (en) 1999-08-05
GB2334154B (en) 2000-04-05
CN1289297A (en) 2001-03-28
DK1053167T3 (en) 2004-02-23
AU2292599A (en) 1999-08-16
GB9802026D0 (en) 1998-03-25

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Effective date: 20170202