Multistep gear
US7018319B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2097
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a multi-step gear, comprising a drive shaft (1) linked with a front-mounted gear train (VS), an output shaft (2) linked with a rear-mounted gear train (NS), and maximally seven shift elements (A, B, C, D, E, D′, A′) through the selective shifting of which at least seven forward gears can be shifted without group shifts. The front-mounted gear train (VS) is formed by a front-mounted planetary gear (VS1) or maximally two non-shiftable front-mounted planetary gears (VS2) coupled with the first front-mounted planetary gear (VS1). The rear-mounted gear train (NS) is configured as a two-stage/four-shaft transmission with two shiftable rear-mounted planetary gears (NS1, NS2) and four free shafts. The first free shaft of said two-stage/four-shaft transmission is linked with the first shift element (A), the second free shaft with the second and third shift elements (B, C), the third free shaft with the fourth and fifth shift element (D, E) and the fourth free shaft with the output shaft (2). In order to provide a multi-step gear with a total of six shift elements, the third free shaft or the first free shaft of the rear-mounted gear (NS) is additionally linked with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.