WO1996029237A1 - Transmission device - Google Patents

Transmission device Download PDF

Info

Publication number
WO1996029237A1
WO1996029237A1 PCT/EP1995/001089 EP9501089W WO9629237A1 WO 1996029237 A1 WO1996029237 A1 WO 1996029237A1 EP 9501089 W EP9501089 W EP 9501089W WO 9629237 A1 WO9629237 A1 WO 9629237A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulleys
belts
rigid
transmission device
central pulley
Prior art date
Application number
PCT/EP1995/001089
Other languages
French (fr)
Inventor
Guido Covre
Original Assignee
Guido Covre
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 Guido Covre filed Critical Guido Covre
Priority to AU21111/95A priority Critical patent/AU2111195A/en
Priority to PCT/EP1995/001089 priority patent/WO1996029237A1/en
Publication of WO1996029237A1 publication Critical patent/WO1996029237A1/en

Links

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
    • B62M1/28—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers characterised by the use of flexible drive members, e.g. chains

Definitions

  • This invention relates to a transmission device.
  • the object of the invention is to provide a transmission device which enables reciprocating motion imparted to two separate pulleys by levers to be converted into circular motion of a driven shaft.
  • a transmission device comprising a central pulley rigid with two pulleys mounted on free wheels and engaging corresponding belts engaged by two pulleys, each of which is driven with reciprocating motion by a lever, the belts also engaging in opposite directions two mutually rigid pulleys.
  • the device of the invention comprises two sprocket wheels 1,1', each keyed onto mutually coaxial but separate corresponding shafts 2,2' which are each mounted in bearings 3,3' and also have keyed thereon a pedal crank 4,4' provided at its end with a pedal 5,5'.
  • the two sprocket wheels 1,1' rotate two chains 6,6' driving two free wheels 7,7' which are rigid with a single central ring gear 8 mounted on a shaft 9.
  • said central ring gear 8 rotates a pinion 13 rigid with the shaft 14 of a rotatable element such as a bicycle wheel, a propeller etc..
  • the chains 6,6' engage corresponding chain tensioners 10,10' mounted in slotted holes 16 and also engage in opposite directions two coaxial sprocket wheels 11,11' made mutually rigid by a shaft 15.
  • the transmission system is operated by alternately pressing on the pedal cranks 4,4' in that a variable angular movement in one direction, for example anticlockwise, of the pedal crank 4' provides a corresponding angular clockwise movement of the other pedal crank 4 by virtue of the fixed coupling between the sprocket wheels 11,11'.
  • a variable angular movement in one direction for example anticlockwise
  • the pedal crank 4' provides a corresponding angular clockwise movement of the other pedal crank 4 by virtue of the fixed coupling between the sprocket wheels 11,11'.
  • the reciprocating motion of the sprocket wheel 1' deriving from the angular movement of the pedal crank is converted into continuous circular motion of the free wheel 7' and of the ring gear 8 rigid therewith, and hence of the pinion 13.
  • the boat propeller is rigidly connected to the driven shaft and the two pedal cranks are longitudinally aligned, to be used either by a single rower or by two opposite rowers.
  • the lateral surface of the ring gear 8 is toothed and is coupled to a bevel gear mounted on a shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A transmission device comprising a central pulley (8) rigid with two pulleys (7, 7') mounted on free wheels and engaging corresponding belts (6, 6') engaged by two pulleys (1, 1'), each of which is driven with reciprocating motion by a lever (4, 4'), the belts (6, 6') also engaging in opposite directions two mutually rigid pulleys (11, 11').

Description

TRANSMISSION DEVICE
This invention relates to a transmission device. The object of the invention is to provide a transmission device which enables reciprocating motion imparted to two separate pulleys by levers to be converted into circular motion of a driven shaft.
This and further objects which will be more apparent from the following description are attained according to the invention by a transmission device comprising a central pulley rigid with two pulleys mounted on free wheels and engaging corresponding belts engaged by two pulleys, each of which is driven with reciprocating motion by a lever, the belts also engaging in opposite directions two mutually rigid pulleys. The present invention is further clarified hereinafter with reference to the accompanying drawings, in which: Figure 1 is a schematic side view of a transmission device according to the invention; and Figure 2 is a longitudinal section therethrough. As can be seen from the figures the device of the invention comprises two sprocket wheels 1,1', each keyed onto mutually coaxial but separate corresponding shafts 2,2' which are each mounted in bearings 3,3' and also have keyed thereon a pedal crank 4,4' provided at its end with a pedal 5,5'.
The two sprocket wheels 1,1' rotate two chains 6,6' driving two free wheels 7,7' which are rigid with a single central ring gear 8 mounted on a shaft 9. By means of a chain 12 said central ring gear 8 rotates a pinion 13 rigid with the shaft 14 of a rotatable element such as a bicycle wheel, a propeller etc.. In particular, the chains 6,6' engage corresponding chain tensioners 10,10' mounted in slotted holes 16 and also engage in opposite directions two coaxial sprocket wheels 11,11' made mutually rigid by a shaft 15.
The transmission system is operated by alternately pressing on the pedal cranks 4,4' in that a variable angular movement in one direction, for example anticlockwise, of the pedal crank 4' provides a corresponding angular clockwise movement of the other pedal crank 4 by virtue of the fixed coupling between the sprocket wheels 11,11'. In the same manner the reciprocating motion of the sprocket wheel 1' deriving from the angular movement of the pedal crank is converted into continuous circular motion of the free wheel 7' and of the ring gear 8 rigid therewith, and hence of the pinion 13.
When the thrust action on the pedal crank 4' is completed, the thrust is exerted on the other pedal crank 4 to again convert the reciprocating motion into circular motion of the free wheel 7 and at the same time to return the pedal crank 4' into its raised position for a further thrust action.
From the aforegoing it is apparent that the transmission device of the invention has numerous advantages, and in particular:
- it can be used as a propulsion device for a bicycle and in particular it is simple to use by persons who have lost the use of one leg, in that after being secured to the pedal crank the healthy leg can be used to push and raise a single pedal crank,
- it can be used as a propulsion device for a canoe; in this case the boat propeller is rigidly connected to the driven shaft and the two pedal cranks are longitudinally aligned, to be used either by a single rower or by two opposite rowers.
In a further embodiment not shown in the drawings the lateral surface of the ring gear 8 is toothed and is coupled to a bevel gear mounted on a shaft.

Claims

C L A I M S
1. A transmission device comprising a central pulley (8) rigid with two pulleys (7,7') mounted on free wheels and engaging corresponding belts (6,6') engaged by two pulleys (1,1'), each of which is driven with reciprocating motion by a lever (4,4'), the belts (6,6') also engaging in opposite directions two mutually rigid pulleys (11,11') .
2. A device as claimed in claim 1 characterised in that the central pulley (8) is mechanically connected to a shaft (14) of a rotatable element.
3. A device as claimed in claim 1, characterised in that the pulleys (1,1') are sprocket wheels and the belts (6,6') are chains.
4. A device as claimed in claim 1, characterised in that the chains (6,6') are also guided about deviation sprocket wheels (10,10') .
5. A device as claimed in claim 4, characterised in that the deviation sprocket wheels are mounted on slotted holes (16) for their adjustment.
6. A device as claimed in claim 2, characterised in that the central pulley (8) is connected by a chain (12) to a pinion (13) .
7. A device as claimed in claim 1 characterised in that the lateral surface of the central pulley (8) is toothed and engages with a bevel gear provided on a shaft.
PCT/EP1995/001089 1995-03-23 1995-03-23 Transmission device WO1996029237A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU21111/95A AU2111195A (en) 1995-03-23 1995-03-23 Transmission device
PCT/EP1995/001089 WO1996029237A1 (en) 1995-03-23 1995-03-23 Transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1995/001089 WO1996029237A1 (en) 1995-03-23 1995-03-23 Transmission device

Publications (1)

Publication Number Publication Date
WO1996029237A1 true WO1996029237A1 (en) 1996-09-26

Family

ID=8165980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/001089 WO1996029237A1 (en) 1995-03-23 1995-03-23 Transmission device

Country Status (2)

Country Link
AU (1) AU2111195A (en)
WO (1) WO1996029237A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189513148A (en) * 1895-07-08 1895-10-12 Beaumaris Woodward Improvement in Driving Gear for Velocipedes.
FR609837A (en) * 1925-05-05 1926-08-25 Propelling device for cycles
FR2370624A1 (en) * 1976-11-10 1978-06-09 Houze Michel Motorcycle with weight transfer compensation - has axis of swing arms arranged higher than upper run of drive chain and anti-dive brake
US5368321A (en) * 1993-08-11 1994-11-29 Allan Douglas Dual-footboard low-profile exercise cycle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189513148A (en) * 1895-07-08 1895-10-12 Beaumaris Woodward Improvement in Driving Gear for Velocipedes.
FR609837A (en) * 1925-05-05 1926-08-25 Propelling device for cycles
FR2370624A1 (en) * 1976-11-10 1978-06-09 Houze Michel Motorcycle with weight transfer compensation - has axis of swing arms arranged higher than upper run of drive chain and anti-dive brake
US5368321A (en) * 1993-08-11 1994-11-29 Allan Douglas Dual-footboard low-profile exercise cycle

Also Published As

Publication number Publication date
AU2111195A (en) 1996-10-08

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