Three-speed bicycle transmission structure and transmission method thereof
US12371127B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2024 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Jun 6, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2087
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a three-speed bicycle transmission structure and the transmission method thereof, aiming at overcoming the drawbacks that the overall structure of the prior art cannot support three-speed transmission in a small space and requires high manufacturing costs. The present invention comprises a central shaft, a three-speed transmission structure and a gearbox housing; wherein, the three-speed transmission structure comprises a centrifugal clutch shifting mechanism, a composite planetary gear ring and a first-level transmission mechanism, a second-level transmission mechanism and a third-level transmission mechanism. The centrifugal clutch shifting mechanism is used for shifting among the above three levels of transmission mechanisms to carry out three-speed transmission, and the composite planetary gear ring is used for cooperating with the centrifugal clutch shifting mechanism to realize partial gear shifting. The present invention realizes simplified structure, compressed structure space, improved transmission efficiency and cost saving.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.