초록
▼
A multi-ratio transmission system is provided, including multiple planet gear sub-systems, at least two coupling assemblies, a setting element, a setting element controller, an annular gear, a cylindrical casing, a sprocket, and a central axle. The planet gear sub-systems are disposed coaxially in series along a first axis. Each of the planet gear sub-system includes a sun gear and at least one planet gear. Each coupling assembly transmits the rotation between every two adjacent planet gear sub-systems. The setting element optionally engages with the sun...
A multi-ratio transmission system is provided, including multiple planet gear sub-systems, at least two coupling assemblies, a setting element, a setting element controller, an annular gear, a cylindrical casing, a sprocket, and a central axle. The planet gear sub-systems are disposed coaxially in series along a first axis. Each of the planet gear sub-system includes a sun gear and at least one planet gear. Each coupling assembly transmits the rotation between every two adjacent planet gear sub-systems. The setting element optionally engages with the sun gear. The annular gear is installed onto a one-way clutch. The cylindrical casing encloses the planet gear sub-systems. The sprocket is installed onto the planet gear sub-systems through the one-way clutch. The central axle enables the hollowed tube of the setting element controller to rotate around the central axle.
대표
청구항
▼
1. A multi-ratio transmission system with parallel vertical and coaxial planet gears, comprising: a plurality of planet gear sub-systems, being coaxially disposed in series along a first axis, each of said planet gear sub-system comprising:a sun gear, being coaxially disposed along said first axis, wherein said sun gear rotates around said first axis; andat least one planet gear, being coaxially disposed along a second axis which is vertical to said first axis, wherein said at least one planet gear rotates around said second axis;at least two coupling as...
1. A multi-ratio transmission system with parallel vertical and coaxial planet gears, comprising: a plurality of planet gear sub-systems, being coaxially disposed in series along a first axis, each of said planet gear sub-system comprising:a sun gear, being coaxially disposed along said first axis, wherein said sun gear rotates around said first axis; andat least one planet gear, being coaxially disposed along a second axis which is vertical to said first axis, wherein said at least one planet gear rotates around said second axis;at least two coupling assemblies, wherein each of said coupling assembly includes a gear set, and is disposed between every two adjacent said planet gear sub-systems so as to transmit rotation of said planet gear of the former said planet gear sub-system to said planet gear of the latter said planet gear sub-system; wherein said at least two coupling assemblies form a group of said coupling assemblies, and groups of coupling assemblies are disposed along said first axis in a repeated manner;a setting element disposed corresponding to each of said planet gear sub-systems, wherein said setting element moves in the direction of said first axis so as to engage with said sun gear of said planet gear sub-system;a setting element controller, having a hollowed tube disposed coaxially with said first axis to rotate around said first axis within a range of predetermined angles, wherein said hollowed tube has an outer circumferential surface, and a cam groove is formed on said outer circumferential surface in the circumferential direction corresponding to each of said setting element of said planet gear sub-system, thereby allowing said setting element to move along said first axis and to engage with said sun gears of said planet gear sub-systems;an annular gear installed onto to a one-way clutch, wherein said annular gear forms a linkage relationship with said planet gear of at least one said planet gear sub-system;a cylindrical casing enclosing said planet gear sub-systems, wherein said cylindrical casing has a front end for rotatably fitting said annular gear;a sprocket installed onto said one-way clutch, wherein said sprocket is installed with an external transmission system to drive said planet gear sub-systems to rotate via said one-way clutch and said annular gear; anda central axle, being disposed coaxially with said first axis, wherein said central axle is inserted into a center through hole of said hollowed tube of said setting element controller by relative rotation, thereby enabling said hollowed tube to rotate around said central axle. 2. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said second axes of said planet gears of said planet gear sub-systems are configured to be parallel to one another. 3. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said sun gear of each of said planet gear sub-systems includes an outer gear, which is a bevel gear, and said planet gear of each said planet gear sub-system is a bevel gear engaging with said outer gear of said sun gear. 4. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 3, wherein said sun gear further includes an inner gear, and said setting element is a crown gear, which engages with said inner gear of said sun gear. 5. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said sun gear of each planet gear sub-system includes an outer gear and an inner gear which are coaxially connected to each other, said outer gear is located at the outer side of said inner gear and is a bevel gear, said planet gear of said planet gear sub-system is a bevel gear, which is engaged with said outer gear of said sun gear, and said setting element is a crown gear, which engages with said inner gear of said sun gear. 6. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein each planet gear sub-system has two planet gears, which are disposed opposite to each other. 7. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said gear set of said coupling assembly includes: two small gears, said two small gears are coaxially connected to said planet gears of said two adjacent planet gear sub-systems respectively, and are rotated in synchronization with said planet gears respectively; anda coupling gear plate disposed between said two small gears and having two gears, wherein said two gears are engaged with said two small gears. 8. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 7, wherein said two gears of said coupling gear plate are two crown gears, and said two crown gears are formed on two axial end surfaces of said coupling gear plate respectively. 9. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 8, wherein said two crown gears of said coupling gear plate are configured to have different diameters. 10. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 8, wherein said two crown gears of said coupling gear plate are configured to have the same diameter. 11. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 8 includes two of said coupling plate, wherein said two crown gears of at least one of said coupling gear plate are configured to have different diameters, and said two crown gears of at least one of said coupling gear plate are configured to have the same diameter. 12. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 8 includes two of said coupling gear plates, wherein said two crown gears of each said coupling gear plate are configured to have different diameters, and said two coupling gear plates are disposed symmetrically with each other. 13. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 12, wherein each of said group of coupling assemblies includes two of said coupling assemblies, said two crown gears of said two coupling gear plate in each said group are configured to have different diameters, and said two coupling gear plates are disposed symmetrically with each other. 14. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 12, wherein each of said group of coupling assemblies includes three of said coupling assemblies, said two crown gears of said two coupling gear plates in said three coupling gear plates of said three coupling assemblies are configured to have different diameters, and said two coupling gear plates are disposed symmetrically with each other; wherein said two crown gears of the other said coupling gear plate are configured to have the same diameter, and the other said coupling gear plate is disposed between the two coupling gear plates described previously. 15. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 7, wherein said annular gear engages with said small gear of a first planet gear sub-system among said planet gear sub-systems, so as to form the linkage relationship between said planet gear and said annular gear. 16. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said central axle has two ends, said two ends of said central axle are secured on a bicycle rack respectively. 17. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 16, wherein two flat surfaces are formed oppositely to each other on each end of said central axle, said two flat surfaces of said central axle are engaged with two corresponding flat surfaces of said bicycle rack to prevent relative rotation between said central axle and said bicycle rack. 18. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said setting element controller further includes a rotation controller, said rotation controller is installed onto an end of said hollowed tube so as to rotate said hollowed tube in said range of predetermined angles. 19. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 18, wherein said rotation controller is installed onto a shift cable connector for connecting to a shift cable, said rotation controller and said hollowed tube installed onto said rotation controller are driven to rotate around said first axis by pulling said shift cable. 20. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 19, wherein a connecting hole is formed on said rotation controller for inserting an inner axial pin of said shift cable connector. 21. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 19 further includes a shift-guiding component inserted and connected to said central axle, wherein a circular guiding groove is formed coaxially with said first axis on said shift-guiding component, said shift cable connector has an outer axial pin which is slidably inserted into said circular guiding groove; wherein said circular guiding groove extends for a range of angles in the circumferential direction corresponding to said range of predetermined angles of the rotation of said hollowed tube of said setting element controller. 22. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 21, wherein an insertion hole is formed at the center of said shift-guiding component, and the two sides of said insertion hole are formed as two flat walls for abutting against said flat surfaces of said central axle, thereby preventing relative rotation between said central axle and said shift-guiding component. 23. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said setting element includes a hollowed cylinder, a plurality of teeth is formed on a side end of said hollowed cylinder, and said hollowed cylinder is disposed coaxially with said sun gear of said planet gear sub-system in such way that said hollowed cylinder moves along said first axis corresponding to said sun gear, thereby allowing said teeth to engage with said sun gear; said hollowed cylinder includes a control pin, wherein a free end of said control pin is inserted into said cam groove to move along said cam groove. 24. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein a shoulder portion is formed between said annular gear and said one-way clutch, an annular flange is formed inwardly at said front end of said cylindrical casing, said annular flange abuts against said shoulder portion of said annular gear to rotatably fit said annular gear inside said front end of said cylindrical casing. 25. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 24 further includes a bearing, wherein said bearing is disposed between said annular flange of said cylindrical casing and said shoulder portion formed between said annular gear and said one-way clutch. 26. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1 includes a second annular gear, wherein said second annular gear is rotatably fitted at a rear end of said cylindrical casing opposite to said front end, said annular gear and said second annular gear form a linkage relationship with the planet gears of said first planet gear sub-systems and a last planet gear sub-systems among said planet gear sub-systems respectively. 27. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 26, wherein said annular gear and said second annular gear are engaged with said small gears of a first and a last of said planet gear sub-systems respectively, thereby forming the linkage relationship between said annular gear, said second annular gear, and said planet gears of said planet gear sub-systems. 28. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 26 further comprising a securing end cap having a center hole, wherein said second annular gear is rotatably supported inside said center hole. 29. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 28, wherein an outer thread is formed at an outer circumferential surface of said securing end cap, an inner thread is formed at an inner circumferential surface at the rear end of said cylindrical casing, said outer thread of said securing end cap is engaged with said inner thread of said cylindrical casing to secure said securing end cap at said rear end of said cylindrical casing. 30. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein each planet gear sub-system includes an annular base, a circular wall structure is formed on said annular base surrounding said setting element and said planet gear of said planet gear sub-system while being disposed coaxially with said first axis; wherein a hole is formed on said annular base for rotatably fitting and supporting an axle of said planet gear. 31. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 1, wherein said one-way clutch includes: a clutch casing integrally formed with said annular gear, wherein said clutch casing has an annular protrusion for installing said sprocket, and at least one pin-fitting hole is formed on said annular protrusion; andat least one pin set fitted inside said pin-fitting hole, wherein said pin set includes a pin, which is constantly pushed outward by a spring to engage with one of a plurality of engaging holes formed on said sprocket, and is retracted from said engaging hole by an external force. 32. The multi-ratio transmission system with parallel vertical and coaxial planet gears according to claim 31, wherein said engaging holes of said sprocket are distributed along a circle, which is coaxial to said first axis, with equal angular intervals in between every two adjacent engaging holes; wherein each engaging hole has a flat surface and an oblique surface opposite to said flat surface, said flat surface is abutted against said pin to transmit force in a given rotation direction, said oblique surface serves as a cam and guides said pin outside said engaging hole upon contact to avoid force transmission in a rotation direction opposite to said given rotation direction.
