WO2007019645A1 - Crank assemblies - Google Patents
Crank assemblies Download PDFInfo
- Publication number
- WO2007019645A1 WO2007019645A1 PCT/AU2006/001194 AU2006001194W WO2007019645A1 WO 2007019645 A1 WO2007019645 A1 WO 2007019645A1 AU 2006001194 W AU2006001194 W AU 2006001194W WO 2007019645 A1 WO2007019645 A1 WO 2007019645A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear
- shaft
- arm
- longitudinal axis
- axis
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
- F16H21/22—Crank gearings; Eccentric gearings with one connecting-rod and one guided slide to each crank or eccentric
- F16H21/30—Crank gearings; Eccentric gearings with one connecting-rod and one guided slide to each crank or eccentric with members having rolling contact
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- 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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- 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
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
- B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
- B62M11/145—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the bottom bracket
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- 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
- B62M3/00—Construction of cranks operated by hand or foot
- B62M3/06—Construction of cranks operated by hand or foot with elliptical or other non-circular rotary movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
- F01B9/02—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with crankshaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/36—Modified dwell of piston in TDC
Definitions
- the present invention relates to crank mechanisms and more particularly but not exclusively to crank mechanisms employed in engines (both 2 stroke and 4 stroke) and vehicles propelled by a rider applying a force to a pedal (such in the case of bicycles).
- Crank mechanisms do not typically take best advantage of the forces applied thereto.
- the force applied to the pedal when the pedal is at the top or bottom of the stroke is applied with greatly minimised torque is applied to the driving sprocket.
- crank mechanism including: a base; a shaft rotatably supported on the base, the shaft having a longitudinal axis about which the shaft is rotatably driven; an arm fixed to the shaft and extending therefrom so that a force applied to the arm at a radial distance displaced from the axis results in a torque applied to the shaft to drive the shaft; a first gear fixed to the base so as to be stationary, the first gear having a first gear longitudinal axis; a second gear, the second gear being rotatably supported on the arm at a radial distance displaced from the shaft axis, the second gear having a longitudinal second gear axis parallel to the first gear axis, with the second gear being meshingly engaged with the first gear; and a connecting rod rotatably attached to the second gear at a position radially displaced from the second gear axis and to apply a force to the second gear to cause rotation thereof about the second gear axis and therefore the first gear axis to cause rotation of the arm
- said second gear has a gear radius, with said predetermined radial distance being approximately equal to said gear radius.
- said predetermined radial distance is less than said gear radius.
- said first gear longitudinal axis is coincident with the longitudinal axis of said shaft so that said arm is rotatably driven about the longitudinal axis of said first gear and said shaft.
- a crank mechanism including: a base; a shaft supported by the base for rotation about a longitudinal axis of the shaft; an arm extending from the shaft; a first gear, said first gear being rotatably supported on the arm at a radial distance displaced from the longitudinal axis of the shaft, said first gear having a first gear longitudinal axis about which the first gear is rotatably driven; a further arm, said further arm being fixed to said first gear and extending therefrom; a connecting rod rotatably attached to the further arm at a radial distance displaced from the longitudinal axis of the first gear so that a force applied to the connecting rod causes rotation of the first gear about the longitudinal axis thereof; a ring gear, said ring gear having an internal gear with the longitudinal axis generally coincident with the longitudinal
- crank mechanism including: a base; a shaft supported by the base and having a longitudinal axis about which the shaft is rotatably driven; a first gear, said first gear being fixed to said shaft so as to rotate therewith; 5 a planetary gear meshingly engaged with the first gear and having a longitudinal axis about which the planetary gear rotates; a track of generally circular configuration extending about the longitudinal axis of said shaft; a connecting rod attached to the second gear at a radial distance displaced from io the longitudinal axis of the second gear so that upon a force being applied to the connecting rod said second gear is caused to rotate about the longitudinal axis of the second gear; and wherein said second gear is operatively associated with the track so as to move therealong and to be guided thereby in a circular path about the longitudinal axis of the shaft.
- crank mechanism including: a base; a shaft, the shaft being rotatably supported by the base for rotation about a longitudinal axis of the shaft; a first arm, said first arm being fixed to said shaft and extending therefrom so 20 that upon a force being applied to the arm said shaft is caused to rotate; a second arm, said second arm being also rotatably supported by the base; a connecting rod rotatably attached to the second arm so that upon a force being applied to the connecting rod, the second arm is caused to rotate about an arm axis generally parallel to the longitudinal axis of the shaft but displaced radially therefrom; 2 5 and wherein said arms are operatively associated and coupled so that rotation of said second arm about the second arm axis causes rotation of the first arm about the longitudinal axis of said shaft by a force being applied to said connecting rod.
- said second arm has a slot
- said first arm has a portion slidably 3 o guided in said slot so that the rotation of said second arm causes the rotation of said first arm.
- crank mechanism including: a driven ring gear supported for rotation about a ring gear axis; a sun gear that is fixed and having a longitudinal axis coincident with said ring 35 gear axis; a planetary gear to rotate about said sun gear and meshingly engage therewith; a connecting rod rotatably attached to the sun gear so that upon a force being applied thereto said sun gear is caused to rotate about said sun gear, with said planetary gear being meshingly engaged with said ring gear to cause rotation thereof.
- said mechanism includes a circular slot extending longitudinally about said ring gear axis, and a pin attached to the connecting rod slidably located in said slot.
- Figure l is a schematic front elevation of a crank mechanism
- Figure 2 is a schematic front elevation of a modification of the crank mechanism of Figure 1;
- Figure 3 is a schematic front elevation of a second crank mechanism
- Figure 4 is a schematic front elevation of a third crank mechanism
- Figure 5 is a schematic front elevation of a fourth crank mechanism.
- crank mechanism 10 In Figure 1 there is schematically depicted a crank mechanism 10.
- the mechanism 10 includes a driven shaft 11 having a longitudinal axis 12.
- the shaft 11 is rotatably supported by bearings 13 on a base 14.
- Fixed to and extending generally radially from the shaft 11 is a crank arm 15 that terminates at its radially outer end with a bearing 16.
- first gear 17 Fixed to the base 14 is a first gear 17 that has external teeth 18.
- second gear 19 Rotatably supported by the bearing 16 is a second gear 19, meshingly engaged with the first gear 18.
- Rotatably attached to the second gear 19 is a connecting rod 20 via a bearing 21, the bearing 21 providing a rotational axis 22.
- the bearing 16 provides a rotational axis 23.
- the bearing 23 is moved radially inward relative to the axis 23.
- FIG. 3 there is schematically depicted a crank mechanism 30.
- the mechanism 30 includes a driven shaft 31 that is supported by means of a bearing 32 in the base 33. Fixed to and extending from the shaft 31 is an arm 34, at me radially outer end of which there is provided a bearing 35.
- the bearing 35 rotatably supports a first gear 36.
- the gear 36 is meshingly engaged with a gear 37 that is part of a ring 38.
- the ring 38 is also externally geared so as to provide an external gear 39.
- Fixed to the gear 36 is an arm 37, with the arm 37 having at its radially outer end a bearing 38 to which a connecting rod 39 is attached.
- the shaft 31 has a longitudinal axis 40 while the bearing 35 provides a longitudinal axis 41.
- the bearing 38 provides a longitudinal axis 42, with the axes 40, 41 and 42 being generally parallel, hi that regard the ring 38 has at its longitudinal axis the axis 40.
- the ring 39 is
- the gear 36 is caused to move angularly about the axis 40 as well as to rotate about the axis 41. Accordingly the arm 34 is driven about the axis 40.
- the shaft 31 merely supports the arm 34, with output being provided by a gear 44 meshingly engaged with the gear 39.
- the gear 44 being supported by a shaft 45 having a longitudinal axis 46.
- crank mechanism 50 has a base 51 that rotatably supports an arm 52 via a bearing 53.
- the radially outer extremity of the arm 52 is provided with a bearing 54.
- the bearing 53 provides a longitudinal axis 55 that is also the longitudinal axis of the shaft 56 to which the arm 52 is attached.
- the bearing 54 has a longitudinal axis 57.
- a further arm 58 is rotatably supported by the base 51 by means of a bearing 59.
- the bearing 59 provides a longitudinal axis 60.
- the arm 58 is longitudinal slotted so as to provide a guide 61 within which the bearing 54 is movably located.
- Attached to the arm 58 by means of a bearing 62 is a crank arm 63.
- the 62 provides a longitudinal axis 64.
- the axes 55, 57, 60 and 64 are generally parallel.
- crank mechanism 70 there is schematically depicted a crank mechanism 70.
- the mechanism 70 includes input drive connecting rods 72 rotatably attached to planetary gears 73.
- the planetary gears 73 meshingly engage sun gears 74.
- the gears 73 are rotatably attached to their respective connecting rods 72 for rotation about axes 75. Attached to each connecting rod 72 is a pin 76 slidably received within a slot 77.
- each gear 73 Meshingly engaged with each gear 73 is a ring gear 78 that is driven so as to rotate about the central longitudinal axis 79.
- the connecting rods may be driven by a piston, pedal or other force applying member.
- the advantage of ameliorating problems in respect of pre-ignition This is obtained by increasing the rate of compression due to increased speed of the piston towards top dead centre. After top dead centre movement of the piston is also more rapid relative to a conventional internal combustion engine.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
Abstract
Crank mechanism (10) comprises driven shaft (11) concentric with fixed gear (17). Crank arm (15) holds planetary gear (19) in mesh with fixed gear (17). Connecting rod (20) which may be joined to the pedal of a bicycle, the piston of an engine, etc is rotatably attached to gear (19) so as to cause rotation thereof and therefore rotation of arm (15) to drive shaft (11). The mechanism is designed to increase the torque applied by a pedal or piston when at the 'top dead centre' position. A similar crank mechanism employs a circular guide track to keep the gears in mesh during orbital motion. Alternative crank mechanism have meshing gears in the form of planetary gears which orbit within ring gears. A still further alternative crank mechanism employs merely multiple crank arms which can slide with respect to each other.
Description
CRANK ASSEMBLIES
Technical Field
The present invention relates to crank mechanisms and more particularly but not exclusively to crank mechanisms employed in engines (both 2 stroke and 4 stroke) and vehicles propelled by a rider applying a force to a pedal (such in the case of bicycles).
Background of the Invention
Crank mechanisms do not typically take best advantage of the forces applied thereto. For example in the case of bicycles, the force applied to the pedal when the pedal is at the top or bottom of the stroke is applied with greatly minimised torque is applied to the driving sprocket.
In the case of engines, considerable force is generated by combustion gases at the upper end of the stroke of the piston, again resulting in reduced torque being applied to the crank shaft.
Further disadvantages in respect of internal combustion engines and their crank mechanisms is their tendency towards pre-ignition particularly in higher compression ratio engines.
Object of the Invention
It is the object of the present invention to overcome or substantially ameliorate at least one of the above disadvantages.
Summary of the Invention
There is disclosed herein a crank mechanism including: a base; a shaft rotatably supported on the base, the shaft having a longitudinal axis about which the shaft is rotatably driven; an arm fixed to the shaft and extending therefrom so that a force applied to the arm at a radial distance displaced from the axis results in a torque applied to the shaft to drive the shaft; a first gear fixed to the base so as to be stationary, the first gear having a first gear longitudinal axis; a second gear, the second gear being rotatably supported on the arm at a radial distance displaced from the shaft axis, the second gear having a longitudinal second gear axis parallel to the first gear axis, with the second gear being meshingly engaged with the first gear; and
a connecting rod rotatably attached to the second gear at a position radially displaced from the second gear axis and to apply a force to the second gear to cause rotation thereof about the second gear axis and therefore the first gear axis to cause rotation of the arm about the longitudinal axis of said shaft. Preferably, said rod is rotatably attached to said second gear for rotation about a rod axis that is generally parallel to the second gear axis, with said rod axis being displaced at a predetermined radial distance from the second gear axis.
Preferably, said second gear has a gear radius, with said predetermined radial distance being approximately equal to said gear radius. In an alternative form, said predetermined radial distance is less than said gear radius.
Preferably, said first gear longitudinal axis is coincident with the longitudinal axis of said shaft so that said arm is rotatably driven about the longitudinal axis of said first gear and said shaft. There is further disclosed herein a crank mechanism including: a base; a shaft supported by the base for rotation about a longitudinal axis of the shaft; an arm extending from the shaft; a first gear, said first gear being rotatably supported on the arm at a radial distance displaced from the longitudinal axis of the shaft, said first gear having a first gear longitudinal axis about which the first gear is rotatably driven; a further arm, said further arm being fixed to said first gear and extending therefrom; a connecting rod rotatably attached to the further arm at a radial distance displaced from the longitudinal axis of the first gear so that a force applied to the connecting rod causes rotation of the first gear about the longitudinal axis thereof; a ring gear, said ring gear having an internal gear with the longitudinal axis generally coincident with the longitudinal axis of the first shaft, said first gear being meshingly engaged with said internal gear, said ring gear having an external gear having a longitudinal axis coincident with the longitudinal axis of the first shaft; and a driven gear meshingly engaged with the external gear so that a force applied to said connecting rod causes rotation of the first gear about the longitudinal axis of the first shaft, with rotation of the first gear causing rotation of the ring gear to drive a second gear. There is further disclosed herein a crank mechanism including:
a base; a shaft supported by the base and having a longitudinal axis about which the shaft is rotatably driven; a first gear, said first gear being fixed to said shaft so as to rotate therewith; 5 a planetary gear meshingly engaged with the first gear and having a longitudinal axis about which the planetary gear rotates; a track of generally circular configuration extending about the longitudinal axis of said shaft; a connecting rod attached to the second gear at a radial distance displaced from io the longitudinal axis of the second gear so that upon a force being applied to the connecting rod said second gear is caused to rotate about the longitudinal axis of the second gear; and wherein said second gear is operatively associated with the track so as to move therealong and to be guided thereby in a circular path about the longitudinal axis of the shaft. I5 There is still further disclosed herein a crank mechanism including: a base; a shaft, the shaft being rotatably supported by the base for rotation about a longitudinal axis of the shaft; a first arm, said first arm being fixed to said shaft and extending therefrom so 20 that upon a force being applied to the arm said shaft is caused to rotate; a second arm, said second arm being also rotatably supported by the base; a connecting rod rotatably attached to the second arm so that upon a force being applied to the connecting rod, the second arm is caused to rotate about an arm axis generally parallel to the longitudinal axis of the shaft but displaced radially therefrom; 25 and wherein said arms are operatively associated and coupled so that rotation of said second arm about the second arm axis causes rotation of the first arm about the longitudinal axis of said shaft by a force being applied to said connecting rod.
Preferably, said second arm has a slot, and said first arm has a portion slidably 3o guided in said slot so that the rotation of said second arm causes the rotation of said first arm.
There is disclosed herein a crank mechanism including: a driven ring gear supported for rotation about a ring gear axis; a sun gear that is fixed and having a longitudinal axis coincident with said ring 35 gear axis;
a planetary gear to rotate about said sun gear and meshingly engage therewith; a connecting rod rotatably attached to the sun gear so that upon a force being applied thereto said sun gear is caused to rotate about said sun gear, with said planetary gear being meshingly engaged with said ring gear to cause rotation thereof. Preferably, said mechanism includes a circular slot extending longitudinally about said ring gear axis, and a pin attached to the connecting rod slidably located in said slot.
Brief Description of the Drawings
Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings wherein:
Figure l is a schematic front elevation of a crank mechanism;
Figure 2 is a schematic front elevation of a modification of the crank mechanism of Figure 1;
Figure 3 is a schematic front elevation of a second crank mechanism; Figure 4 is a schematic front elevation of a third crank mechanism;
Figure 5 is a schematic front elevation of a fourth crank mechanism.
Detailed Description of the Preferred Embodiments
In Figure 1 there is schematically depicted a crank mechanism 10. The mechanism 10 includes a driven shaft 11 having a longitudinal axis 12. The shaft 11 is rotatably supported by bearings 13 on a base 14. Fixed to and extending generally radially from the shaft 11 is a crank arm 15 that terminates at its radially outer end with a bearing 16.
Fixed to the base 14 is a first gear 17 that has external teeth 18. Rotatably supported by the bearing 16 is a second gear 19, meshingly engaged with the first gear 18. Rotatably attached to the second gear 19 is a connecting rod 20 via a bearing 21, the bearing 21 providing a rotational axis 22. The bearing 16 provides a rotational axis 23.
In operation of the above described crank mechanism 10, upon a force being applied to the connecting rod 20, the gear 19 is still caused to rotate about the axis 23 that in turn causes rotation of the arm 15 about the axis 12, and therefore rotation of the shaft 11.
In the embodiment of Figure 2, the bearing 23 is moved radially inward relative to the axis 23.
In Figure 3 there is schematically depicted a crank mechanism 30. The mechanism 30 includes a driven shaft 31 that is supported by means of a bearing 32 in the
base 33. Fixed to and extending from the shaft 31 is an arm 34, at me radially outer end of which there is provided a bearing 35. The bearing 35 rotatably supports a first gear 36. The gear 36 is meshingly engaged with a gear 37 that is part of a ring 38. The ring 38 is also externally geared so as to provide an external gear 39. Fixed to the gear 36 is an arm 37, with the arm 37 having at its radially outer end a bearing 38 to which a connecting rod 39 is attached. The shaft 31 has a longitudinal axis 40 while the bearing 35 provides a longitudinal axis 41. The bearing 38 provides a longitudinal axis 42, with the axes 40, 41 and 42 being generally parallel, hi that regard the ring 38 has at its longitudinal axis the axis 40. The ring 39 is supported by bearings 43.
In operation of the mechanism 30, upon force being applied to the rod 39, the gear 36 is caused to move angularly about the axis 40 as well as to rotate about the axis 41. Accordingly the arm 34 is driven about the axis 40.
In an alternative embodiment, the shaft 31 merely supports the arm 34, with output being provided by a gear 44 meshingly engaged with the gear 39. The gear 44 being supported by a shaft 45 having a longitudinal axis 46.
In Figure 5 there is schematically depicted a crank mechanism 50. The crank mechanism 50 has a base 51 that rotatably supports an arm 52 via a bearing 53. The radially outer extremity of the arm 52 is provided with a bearing 54. The bearing 53 provides a longitudinal axis 55 that is also the longitudinal axis of the shaft 56 to which the arm 52 is attached. The bearing 54 has a longitudinal axis 57.
Also rotatably supported by the base 51 is a further arm 58 by means of a bearing 59. The bearing 59 provides a longitudinal axis 60. The arm 58 is longitudinal slotted so as to provide a guide 61 within which the bearing 54 is movably located. Attached to the arm 58 by means of a bearing 62 is a crank arm 63. The bearing
62 provides a longitudinal axis 64. The axes 55, 57, 60 and 64 are generally parallel.
Upon a force being applied to the arm 63, the arm 63 causes angular movement of the arm 50 about the axis 60. Angular movement of the arm 58 in turn causes angular movement of the arm 50 and therefore rotation of the shaft 56. Due to the radial displacement of the axis 60 from the axis 55, the bearing 54 will move longitudinally of the guide 61. hi Figure 4 there is schematically depicted a crank mechanism 70. The mechanism 70 includes input drive connecting rods 72 rotatably attached to planetary gears 73. The planetary gears 73 meshingly engage sun gears 74. The gears 73 are
rotatably attached to their respective connecting rods 72 for rotation about axes 75. Attached to each connecting rod 72 is a pin 76 slidably received within a slot 77.
Meshingly engaged with each gear 73 is a ring gear 78 that is driven so as to rotate about the central longitudinal axis 79. In operation of the above crank mechanism 70, upon a force being applied to the connecting rod 72, the planetary gears 73 rotate about their respective axes 75 whilst also rotating about the central longitudinal axis 76. This rotation in turn causes rotation of the associated ring gear 78. In the above described preferred embodiments, the connecting rods may be driven by a piston, pedal or other force applying member. In the above described preferred embodiments, when employed in an internal combustion engine, provide the advantage of ameliorating problems in respect of pre-ignition. This is obtained by increasing the rate of compression due to increased speed of the piston towards top dead centre. After top dead centre movement of the piston is also more rapid relative to a conventional internal combustion engine.
Claims
1. A crank mechanism including: a base; a shaft rotatably supported on the base, the shaft having a longitudinal axis about which the shaft is rotatably driven; an arm fixed to the shaft and extending therefrom so that a force applied to the arm at a radial distance displaced from the axis results in a torque applied to the shaft to drive the shaft; a first gear fixed to the base so as to be stationary, the first gear having a first gear longitudinal axis; a second gear, the second gear being rotatably supported on the arm at a radial distance displaced from the shaft axis, the second gear having a longitudinal second gear axis parallel to the first gear axis, with the second gear being meshingly engaged with the first gear; and a connecting rod rotatably attached to the second gear at a position radially displaced from the second gear axis and to apply a force to the second gear to cause rotation thereof about the second gear axis and therefore the first gear axis to cause rotation of the arm about the longitudinal axis of said shaft.
2. The mechanism of claim 1, wherein said rod is rotatably attached to said second gear for rotation about a rod axis that is generally parallel to the second gear axis, with said rod axis being displaced at a predetermined radial distance from the second gear axis.
3. The mechanism of claim 2, wherein said second gear has a gear radius, with said predetermined radial distance being approximately equal to said gear radius.
4. The mechanism of claim 3, wherein said predetermined radial distance is less than said gear radius.
5. The mechanism of any one of claims 1 to 4, wherein said first gear longitudinal axis is coincident with the longitudinal axis of said shaft so that said arm is rotatably driven about the longitudinal axis of said first gear and said shaft.
6. A crank mechanism including: a base; a shaft supported by the base for rotation about a longitudinal axis of the shaft; an arm extending from the shaft; a first gear, said first gear being rotatably supported on the arm at a radial distance displaced from the longitudinal axis of the shaft, said first gear having a first gear longitudinal axis about which the first gear is rotatably driven; a further arm, said further arm being fixed to said first gear and extending therefrom; a connecting rod rotatably attached to the further arm at a radial distance displaced from the longitudinal axis of the first gear so that a force applied to the connecting rod causes rotation of the first gear about the longitudinal axis thereof; a ring gear, said ring gear having an internal gear with the longitudinal axis generally coincident with the longitudinal axis of the first shaft, said first gear being meshingly engaged with said internal gear, said ring gear having an external gear having a longitudinal axis coincident with the longitudinal axis of the first shaft; and a driven gear meshingly engaged with the external gear so that a force applied to said connecting rod causes rotation of the first gear about the longitudinal axis of the first shaft, with rotation of the first gear causing rotation of the ring gear to drive a second gear.
7. A crank mechanism including: a base; a shaft supported by the base and having a longitudinal axis about which the shaft is rotatably driven; a first gear, said first gear being fixed to said shaft so as to rotate therewith; a planetary gear meshingly engaged with the first gear and having a longitudinal axis about which the planetary gear rotates; a track of generally circular configuration extending about the longitudinal axis of said shaft; a connecting rod attached to the second gear at a radial distance displaced from the longitudinal axis of the second gear so that upon a force being applied to the connecting rod said second gear is caused to rotate about the longitudinal axis of the second gear; and wherein said second gear is operatively associated with the track so as to move therealong and to be guided thereby in a circular path about the longitudinal axis of the shaft.
8. A crank mechanism including: a base; a shaft, the shaft being rotatably supported by the base for rotation about a longitudinal axis of the shaft; a first arm, said first arm being fixed to said shaft and extending tliererrom so that upon a force being applied to the arm said shaft is caused to rotate; a second arm, said second arm being also rotatably supported by the base; a connecting rod rotatably attached to the second arm so that upon a force being applied to the connecting rod, the second arm is caused to rotate about an arm axis generally parallel to the longitudinal axis of the shaft but displaced radially therefrom; and wherein said arms are operatively associated and coupled so that rotation of said second arm about the second arm axis causes rotation of the first arm about the longitudinal axis of said shaft by a force being applied to said connecting rod.
9. The mechanism of claim 8, wherein said second arm has a slot, and said first arm has a portion slidably guided in said slot so that the rotation of said second arm causes the rotation of said first arm.
10. A crank mechanism including: a driven ring gear supported for rotation about a ring gear axis; a sun gear that is fixed and having a longitudinal axis coincident with said ring gear axis; a planetary gear to rotate about said sun gear and meshingly engage therewith; a connecting rod rotatably attached to the sun gear so that upon a force being applied thereto said sun gear is caused to rotate about said sun gear, with said planetary gear being meshingly engaged with said ring gear to cause rotation thereof.
11. The mechanism of claim 10, wherein said mechanism includes a circular slot extending longitudinally about said ring gear axis, and a pin attached to the connecting rod slidably located in said slot.
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2005904488 | 2005-08-18 | ||
| AU2005904488A AU2005904488A0 (en) | 2005-08-18 | Cosmos | |
| AU2005905497 | 2005-10-06 | ||
| AU2005905497A AU2005905497A0 (en) | 2005-10-06 | Cosmos | |
| AU2005905796A AU2005905796A0 (en) | 2005-10-20 | Cosmos | |
| AU2005905796 | 2005-10-20 | ||
| AU2006900341A AU2006900341A0 (en) | 2006-01-24 | Cosmos | |
| AU2006900341 | 2006-01-24 | ||
| AU2006900960A AU2006900960A0 (en) | 2006-02-27 | Cosmos | |
| AU2006900960 | 2006-02-27 | ||
| AU2006902393A AU2006902393A0 (en) | 2006-05-08 | Cosmos | |
| AU2006902393 | 2006-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007019645A1 true WO2007019645A1 (en) | 2007-02-22 |
Family
ID=37757260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2006/001194 WO2007019645A1 (en) | 2005-08-18 | 2006-08-18 | Crank assemblies |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2007019645A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009105841A2 (en) * | 2008-11-24 | 2009-09-03 | Ramzan Usmanovich Goytemirov | Internal combustion engine |
| CN102527864A (en) * | 2012-01-06 | 2012-07-04 | 济南二机床集团有限公司 | Servo feeding transmission mechanism |
| CN105172983A (en) * | 2015-10-14 | 2015-12-23 | 孙德明 | Novel driving device |
| DE102017008201A1 (en) * | 2017-08-30 | 2019-02-28 | Georg Schreiber | Eccentric planetary gear for a double crank |
| CN112437737A (en) * | 2018-07-18 | 2021-03-02 | 费利克斯·施密特 | Crank drive with cyclic variation of the length of the active lever |
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| FR2589212A1 (en) * | 1985-10-24 | 1987-04-30 | Voisine Marc | Device intended to facilitate the passage through the neutral points in a linear to rotary movement system for a piston engine, reciprocating pump or any vehicle moved by pedalling |
| WO1988008095A1 (en) * | 1987-04-13 | 1988-10-20 | Heinz Frey | Crank mechanism |
| FR2701246A1 (en) * | 1993-02-05 | 1994-08-12 | Le Guelennec Emile | Improved pedal and crank assembly system for a bicycle |
| AU5187200A (en) * | 1999-08-05 | 2001-02-08 | Claude Neil Bresland | Coupling arrangement for reciprocating piston engine |
| JP2005226820A (en) * | 2004-02-13 | 2005-08-25 | Shoichi Kagami | Speed change crank device |
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|---|---|---|---|---|
| GB129283A (en) * | 1918-07-01 | 1920-03-18 | Thoger Gronborg Jungersen | Improvements in Internal Combustion Engines. |
| FR2589212A1 (en) * | 1985-10-24 | 1987-04-30 | Voisine Marc | Device intended to facilitate the passage through the neutral points in a linear to rotary movement system for a piston engine, reciprocating pump or any vehicle moved by pedalling |
| WO1988008095A1 (en) * | 1987-04-13 | 1988-10-20 | Heinz Frey | Crank mechanism |
| FR2701246A1 (en) * | 1993-02-05 | 1994-08-12 | Le Guelennec Emile | Improved pedal and crank assembly system for a bicycle |
| AU5187200A (en) * | 1999-08-05 | 2001-02-08 | Claude Neil Bresland | Coupling arrangement for reciprocating piston engine |
| JP2005226820A (en) * | 2004-02-13 | 2005-08-25 | Shoichi Kagami | Speed change crank device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009105841A2 (en) * | 2008-11-24 | 2009-09-03 | Ramzan Usmanovich Goytemirov | Internal combustion engine |
| WO2009105841A3 (en) * | 2008-11-24 | 2013-07-18 | Ramzan Usmanovich Goytemirov | Internal combustion engine |
| CN102527864A (en) * | 2012-01-06 | 2012-07-04 | 济南二机床集团有限公司 | Servo feeding transmission mechanism |
| CN105172983A (en) * | 2015-10-14 | 2015-12-23 | 孙德明 | Novel driving device |
| DE102017008201A1 (en) * | 2017-08-30 | 2019-02-28 | Georg Schreiber | Eccentric planetary gear for a double crank |
| DE102017008201B4 (en) * | 2017-08-30 | 2021-06-24 | Georg Schreiber | Planetary gear with gears mounted eccentrically with respect to its own axis of symmetry for a double crank |
| CN112437737A (en) * | 2018-07-18 | 2021-03-02 | 费利克斯·施密特 | Crank drive with cyclic variation of the length of the active lever |
| CN112437737B (en) * | 2018-07-18 | 2023-06-13 | 费利克斯·施密特 | Crank drive with periodic variation of the length of the active lever |
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