GB2065576A - A drive mechanism for a wheel of a cycle or the like - Google Patents

A drive mechanism for a wheel of a cycle or the like Download PDF

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Publication number
GB2065576A
GB2065576A GB7943589A GB7943589A GB2065576A GB 2065576 A GB2065576 A GB 2065576A GB 7943589 A GB7943589 A GB 7943589A GB 7943589 A GB7943589 A GB 7943589A GB 2065576 A GB2065576 A GB 2065576A
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United Kingdom
Prior art keywords
drum
wheel
sectors
pedals
pinion
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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.)
Withdrawn
Application number
GB7943589A
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MARRACCINI M
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MARRACCINI M
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Publication date
Application filed by MARRACCINI M filed Critical MARRACCINI M
Priority to GB7943589A priority Critical patent/GB2065576A/en
Publication of GB2065576A publication Critical patent/GB2065576A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/24—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers
    • B62M1/30—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers characterised by the use of intermediate gears

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A mechanism for driving a wheel of a cycle or the like comprises two toothed sectors (3, 12) which are fastened to oscillating pedal levers (17, 18), pivotable about a shaft (2), and are in mesh with a pinion (1) so that the two levers are constrained to pivot in opposite directions. A conical toothed wheel (9) is connected to rotate with the pinion (1) and meshes with two planet wheels (5, 14) connected via ratchet wheels (6, 15) to a drum (7) on the wheel so that the latter is continuously rotated by means of the alternate oscillation of the pedal levers. Spring means designed to restore each pedal lever to a resting position during the driving phase of the other are also provided. <IMAGE>

Description

SPECIFICATION A kinematic drive mechanism for a wheel of a cycle or the like This invention relates to a kinematic drive mechanism for a wheel of a cycle or the like, particularly, but not exclusively suitabie for providing a drive for a cycle or the like provided with pedals moving with alternate motion.
As is known, the pedals in a traditional bicycle carry out fuil rotation. This means that the muscular strength of the cyclist cannot be fully exploited, because of dead-points in the pedal movement and the limited length of the pedals. Moreover, as the transmission is exterior to the bicycle frame, it is necessary to provide a suitable protection means, so that the cyclists clothes do not get caught up in the transmission mechanism. There is thus a need for a generaily improved kinematic drive mechanism.
According to the present invention there is provided a kinematic drive mechanism for a wheel of a cycle or the like, including a drum fixedly connectible to the wheel to be driven for rotation therewith, two toothed sectors housed in the drum and each fixedly connectible to a pedal for pivotal movement therewith, a pinion housed in the drum and meshing with the two sectors, a conical toothed wheel in the drum and fixedly attached to the pinion for rotation therewith, two planet wheels housed in the drum meshing with the conical toothed wheel, and connected to the drum through respective ratchet wheels, so that the drum may be set in continuously rotating motion by means of alternate pivotal operation of the pedals when connected to the sectors, and means for restoring each of the sectors and thereby each of the pedals when connected thereto, to a rest or start position in turn during the driving stroke of the other.
For a better understanding of the present invention and to show how the same may be carried into effect, reference will now be made by way of example to the accompanying single figure drawing which shows in vertical section a view through a kinematic drive mechanism according to the invention.
As shown in the drawing a kinematic drive mechanism of the invention for a wheel of a cycle or the like includes a shaft 2 secured to the cycle frame. A pair of coupling portions 1 9 fit on this shaft 2, in such a way as to perform a 90 pivotal movement around the shaft axis. One end of each coupling portion 1 9 is connectible to a pedal 18, and the other end to a respective toothed sector 3. There is also a return spring (not shown). Sector 13 meshes with a pinion 1, to which a conical toothed wheel 9 is rotatively connected.The wheel 9 meshes with two opposed planet wheels 5 and 14, which are freely rotatively mounted via ball races on the coupling portions 19, and are exteriorly connected to a drum 7 through ratchet wheels 6 and 1 5. The drum 7 is fixedly securable to a wheel and may form the wheel hub.
Pedal 18, by moving around the wheel shaft 2 through 90 , pivots sector 3 too, which, while turning around shaft 2 in mesh with pinion 1 makes it turn.
At the same time, pinion 1 makes the sector 1 2 turn the other way round, and drives the return of the opposite pedal. Pinion 1 is connected to the conical toothed wheel 9 which makes planet wheels 14 and 5 turn in the opposite direction the one with reference to the other. The ratchet wheels 6 and 1 5 are linked to the planet wheels and to drum 7.
The alternate turning of wheels 6 and 1 5 cause drum rotation.
When the pedals are still, the drum can turn freely on the ratchet wheels. Thus by means of the alternate motion of the pedals, a continuous rotation of the drum is effected and thus of the driving wheel. As the run thereof is limited to a parabola without dead points, peak efficiency is thus approached.
1. A kinematic drive mechanism for a wheel of a cycle or the like, including a drum fixedly connectible to the wheel to be driven for rotation therewith, two toothed sectors housed in the drum and each fixedly connectible to a pedal for pivotal movement therewith, a pinion housed in the drum and meshing with the two sectors, a conical toothed wheel in the drum and fixedly attached to the pinion for rotation therewith, two planet wheels housed in the drum, meshing with the conical toothed wheel, and connected to the drum through respective ratchet wheels, so that the drum may be set in continuously rotating motion by means of alternatie pivotal operation of the pedals when connected to the sectors, and means for restoring each of the sectors and thereby each of the pedals when connected thereto, to a rest or start position in turn during the driving stroke of the other.
2. A mechanism according to claim 1, including a shaft attachable to a frame having the wheel to be driven, on which shaft the sectors, planet wheels and ratchet wheels are mounted in the drum.
3. A mechanism according to claim 2, in which the two sectors are arranged to act alternately in response to a pivotal movement of approximately 90 of the pedals when connected thereto.
4. A mechanism according to claim 2 or claim 3, in which the drum is connected to the planet wheels via the two ratchet wheels which are arranged to act alternately.
5. A mechanism according to any one of claims 2 to 4, in which the sectors each include a tubular coupling portion pivotally
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A kinematic drive mechanism for a wheel of a cycle or the like This invention relates to a kinematic drive mechanism for a wheel of a cycle or the like, particularly, but not exclusively suitabie for providing a drive for a cycle or the like provided with pedals moving with alternate motion. As is known, the pedals in a traditional bicycle carry out fuil rotation. This means that the muscular strength of the cyclist cannot be fully exploited, because of dead-points in the pedal movement and the limited length of the pedals. Moreover, as the transmission is exterior to the bicycle frame, it is necessary to provide a suitable protection means, so that the cyclists clothes do not get caught up in the transmission mechanism. There is thus a need for a generaily improved kinematic drive mechanism. According to the present invention there is provided a kinematic drive mechanism for a wheel of a cycle or the like, including a drum fixedly connectible to the wheel to be driven for rotation therewith, two toothed sectors housed in the drum and each fixedly connectible to a pedal for pivotal movement therewith, a pinion housed in the drum and meshing with the two sectors, a conical toothed wheel in the drum and fixedly attached to the pinion for rotation therewith, two planet wheels housed in the drum meshing with the conical toothed wheel, and connected to the drum through respective ratchet wheels, so that the drum may be set in continuously rotating motion by means of alternate pivotal operation of the pedals when connected to the sectors, and means for restoring each of the sectors and thereby each of the pedals when connected thereto, to a rest or start position in turn during the driving stroke of the other. For a better understanding of the present invention and to show how the same may be carried into effect, reference will now be made by way of example to the accompanying single figure drawing which shows in vertical section a view through a kinematic drive mechanism according to the invention. As shown in the drawing a kinematic drive mechanism of the invention for a wheel of a cycle or the like includes a shaft 2 secured to the cycle frame. A pair of coupling portions 1 9 fit on this shaft 2, in such a way as to perform a 90 pivotal movement around the shaft axis. One end of each coupling portion 1 9 is connectible to a pedal 18, and the other end to a respective toothed sector 3. There is also a return spring (not shown). Sector 13 meshes with a pinion 1, to which a conical toothed wheel 9 is rotatively connected.The wheel 9 meshes with two opposed planet wheels 5 and 14, which are freely rotatively mounted via ball races on the coupling portions 19, and are exteriorly connected to a drum 7 through ratchet wheels 6 and 1 5. The drum 7 is fixedly securable to a wheel and may form the wheel hub. Pedal 18, by moving around the wheel shaft 2 through 90 , pivots sector 3 too, which, while turning around shaft 2 in mesh with pinion 1 makes it turn. At the same time, pinion 1 makes the sector 1 2 turn the other way round, and drives the return of the opposite pedal. Pinion 1 is connected to the conical toothed wheel 9 which makes planet wheels 14 and 5 turn in the opposite direction the one with reference to the other. The ratchet wheels 6 and 1 5 are linked to the planet wheels and to drum 7. The alternate turning of wheels 6 and 1 5 cause drum rotation. When the pedals are still, the drum can turn freely on the ratchet wheels. Thus by means of the alternate motion of the pedals, a continuous rotation of the drum is effected and thus of the driving wheel. As the run thereof is limited to a parabola without dead points, peak efficiency is thus approached. CLAIMS
1. A kinematic drive mechanism for a wheel of a cycle or the like, including a drum fixedly connectible to the wheel to be driven for rotation therewith, two toothed sectors housed in the drum and each fixedly connectible to a pedal for pivotal movement therewith, a pinion housed in the drum and meshing with the two sectors, a conical toothed wheel in the drum and fixedly attached to the pinion for rotation therewith, two planet wheels housed in the drum, meshing with the conical toothed wheel, and connected to the drum through respective ratchet wheels, so that the drum may be set in continuously rotating motion by means of alternatie pivotal operation of the pedals when connected to the sectors, and means for restoring each of the sectors and thereby each of the pedals when connected thereto, to a rest or start position in turn during the driving stroke of the other.
2. A mechanism according to claim 1, including a shaft attachable to a frame having the wheel to be driven, on which shaft the sectors, planet wheels and ratchet wheels are mounted in the drum.
3. A mechanism according to claim 2, in which the two sectors are arranged to act alternately in response to a pivotal movement of approximately 90 of the pedals when connected thereto.
4. A mechanism according to claim 2 or claim 3, in which the drum is connected to the planet wheels via the two ratchet wheels which are arranged to act alternately.
5. A mechanism according to any one of claims 2 to 4, in which the sectors each include a tubular coupling portion pivotally carried on the shaft so that a respective pedal may be attached to an end of the respective coupling portion projecting from the drum with the other end of each coupling portion being provided with the respective toothed sector located such that the two toothed sectors are in spaced facing array in the drum with the pinion therebetween and meshing therewith, each planet wheel being rotatably mounted on its associated coupling portion in mesh with the conical toothed wheel and carrying its associated ratchet wheel.
6. A mechansim according to any one of claims 1 to 5, wherein the rest position restoring means is a spring.
7. A kinematic drive mechanis for a wheel of a cycle or the like substantially as hereinbefore described with reference to the accompanying drawing.
8. A cycle having a kinematic drive mechanism according to claim 1, substantially as hereinbefore described with reference to the accompanying drawing.
GB7943589A 1979-12-18 1979-12-18 A drive mechanism for a wheel of a cycle or the like Withdrawn GB2065576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7943589A GB2065576A (en) 1979-12-18 1979-12-18 A drive mechanism for a wheel of a cycle or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7943589A GB2065576A (en) 1979-12-18 1979-12-18 A drive mechanism for a wheel of a cycle or the like

Publications (1)

Publication Number Publication Date
GB2065576A true GB2065576A (en) 1981-07-01

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GB7943589A Withdrawn GB2065576A (en) 1979-12-18 1979-12-18 A drive mechanism for a wheel of a cycle or the like

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3404562A1 (en) * 1984-02-09 1985-08-22 Michael Greifenberg Tread transmission with non-uniform transmission ratio, in particular for bicycles and other vehicles and home exercise equipment with leg-powered drive
DE3736486A1 (en) * 1986-10-30 1989-01-05 Erika Zeddies Apparatus for motor-drive of bicycles
GB2210431A (en) * 1987-09-29 1989-06-07 Micron Sprayers Ltd Drive unit for a spraying machine
GB2213226A (en) * 1987-12-07 1989-08-09 Stan Cucek Power transmission device
GB2219261A (en) * 1988-06-03 1989-12-06 Alan David Ferrie Reciprocating human drive mechanism
DE4033744A1 (en) * 1990-10-24 1991-03-28 Werner Guenther Dipl Ing Fh Treadle-lever drive ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ - is for bicycle and has bevel wheels accommodated in transmission casing
GR890100305A (en) * 1989-05-08 1991-10-10 Iraklis Zervas Bicycle mechanism of energy amplifier and other uses thereof
WO1995021090A1 (en) * 1994-02-04 1995-08-10 Novator, L.L.C. Pedal mechanism for cycle and exercise equipment
FR2726532A1 (en) * 1994-11-04 1996-05-10 Toulet Claude Device for transformation of bicycle crank lever oscillations into continuous rotational movement
FR2753431A1 (en) * 1996-09-19 1998-03-20 Chih Yin Chung Speed changing device for bicycle
US5884927A (en) * 1996-10-16 1999-03-23 Mahaney; Joseph B. 2-way bicycle drive unit
WO2001092092A3 (en) * 2000-05-31 2002-04-25 Vladimir Markovic Drive gear for conversion of swinging motion into continuous rotation with single- or double-acting drive and incorporated coupling and brake
GB2407305A (en) * 2003-10-24 2005-04-27 Frederick John Adams Reciprocatory twin lever power transmission system
GB2438183A (en) * 2006-05-19 2007-11-21 Robert Maclean Muirhead Bicycle with arcuately reciprocating pedal crank arms
ITTO20100499A1 (en) * 2010-06-11 2011-12-12 Testi S R L REVERSAL DEVICE FOR THE ROTATION OF THE PEDALING.

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3404562A1 (en) * 1984-02-09 1985-08-22 Michael Greifenberg Tread transmission with non-uniform transmission ratio, in particular for bicycles and other vehicles and home exercise equipment with leg-powered drive
DE3736486A1 (en) * 1986-10-30 1989-01-05 Erika Zeddies Apparatus for motor-drive of bicycles
GB2210431A (en) * 1987-09-29 1989-06-07 Micron Sprayers Ltd Drive unit for a spraying machine
GB2213226A (en) * 1987-12-07 1989-08-09 Stan Cucek Power transmission device
GB2219261A (en) * 1988-06-03 1989-12-06 Alan David Ferrie Reciprocating human drive mechanism
GR890100305A (en) * 1989-05-08 1991-10-10 Iraklis Zervas Bicycle mechanism of energy amplifier and other uses thereof
DE4033744A1 (en) * 1990-10-24 1991-03-28 Werner Guenther Dipl Ing Fh Treadle-lever drive ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ - is for bicycle and has bevel wheels accommodated in transmission casing
US5662347A (en) * 1994-02-04 1997-09-02 Novator, L.L.C. Pedal mechanism for cycle and exercise equipment
WO1995021090A1 (en) * 1994-02-04 1995-08-10 Novator, L.L.C. Pedal mechanism for cycle and exercise equipment
US5551718A (en) * 1994-02-04 1996-09-03 Novator Llc Pedal mechanism for cycle and exercise equipment
US5662346A (en) * 1994-02-04 1997-09-02 Novator, L.L.C. Pedal mechanism for cycle and exercise equipment
FR2726532A1 (en) * 1994-11-04 1996-05-10 Toulet Claude Device for transformation of bicycle crank lever oscillations into continuous rotational movement
FR2753431A1 (en) * 1996-09-19 1998-03-20 Chih Yin Chung Speed changing device for bicycle
US5884927A (en) * 1996-10-16 1999-03-23 Mahaney; Joseph B. 2-way bicycle drive unit
WO2001092092A3 (en) * 2000-05-31 2002-04-25 Vladimir Markovic Drive gear for conversion of swinging motion into continuous rotation with single- or double-acting drive and incorporated coupling and brake
GB2407305A (en) * 2003-10-24 2005-04-27 Frederick John Adams Reciprocatory twin lever power transmission system
GB2438183A (en) * 2006-05-19 2007-11-21 Robert Maclean Muirhead Bicycle with arcuately reciprocating pedal crank arms
ITTO20100499A1 (en) * 2010-06-11 2011-12-12 Testi S R L REVERSAL DEVICE FOR THE ROTATION OF THE PEDALING.
EP2394898A1 (en) * 2010-06-11 2011-12-14 Testi S.r.l. Device for inverting the direction of rotation of the pedal stroke for bicycles

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