Gear set assembly and bicycle gearing system

Patent metadata

Field	Value
Publication number	US-12291304-B2
Application number	US-202218682584-A
Country	US
Kind code	B2
Filing date	Jul 27, 2022
Priority date	Aug 10, 2021
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A gear set arrangement ( 10 ) for a bicycle gearbox ( 400 ) includes a planetary assembly, a stationary component ( 24 ), a first and a second brake (B 1 , B 2 ), and a first and a second freewheel clutch (F 1 , F 2 ). One planetary gear set ( 12 ) of the planetary assembly includes a first rotary element, a second rotary element, and a third rotary element. The first rotary element is rotationally fixable on the stationary component ( 24 ) by the first brake (B 1 ). The first rotary element is connectable to the output ( 36 ) by the first freewheel clutch (F 1 ). The second rotary element is rotationally fixable on the stationary component ( 24 ) by the second brake (B 2 ). The second rotary element is connectable to the output ( 36 ) by the second freewheel clutch (F 2 ). The third rotary element is connected to the input ( 34 ) for conjoint rotation. The gear set arrangement ( 10 ) is configured to provide three ratios.

First claim

The invention claimed is:

1. A gear set arrangement ( 10 ) for a planetary gearbox of a bicycle, comprising:
a planetary assembly comprising an input ( 34 ), an output ( 36 ), and a planetary gear set ( 12 ) with a first rotary element, a second rotary element, and a third rotary element, the first rotary element is a sun gear ( 14 );
a stationary component ( 24 );
a first brake (B 1 );
a second brake (B 2 );
a first freewheel clutch (F 1 ); and
a second freewheel clutch (F 2 ),
wherein the first rotary element is rotationally fixable on the stationary component ( 24 ) by the first brake (B 1 ), the first rotary element is connectable to the output ( 36 ) for conjoint rotation by the first freewheel clutch (F 1 ), the second rotary element is rotationally fixable on the stationary component ( 24 ) by the second brake (B 2 ), the second rotary element is connectable to the output ( 36 ) for conjoint rotation by the second freewheel clutch (F 2 ), the third rotary element is permanently connected to the input ( 34 ) for conjoint rotation, and
wherein the gear set arrangement ( 10 ) is configured to provide three ratios between the input ( 34 ) and the output ( 36 ).

2. The gear set arrangement ( 100 ; 200 ) of claim 1 , wherein the planetary gear set ( 112 ) is a negative planetary gear set, the second rotary element is a ring gear ( 118 ), and the third rotary element is a planet carrier ( 116 ).

3. The gear set arrangement ( 10 ) of claim 1 , wherein the planetary gear set ( 12 ) is a positive planetary gear set, the second rotary element is a planet carrier ( 16 ), and the third rotary element is a ring gear ( 18 ).

4. The gear set arrangement ( 100 ) of claim 2 , wherein the sun gear ( 114 , 150 , 152 ) is divided.

5. The gear set arrangement ( 200 ) of claim 2 , wherein the ring gear ( 118 , 250 , 252 ) is divided.

6. The gear set arrangement ( 10 ; 100 ; 200 ) of claim 1 , wherein the first brake (B 1 ) and the second brake (B 2 ) are simultaneously actuatable in order to lock the planetary assembly.

7. The gear set arrangement ( 10 ; 100 ; 200 ) of claim 1 , wherein the first freewheel clutch (F 1 ) is configured to automatically switch to a locking direction state when the second brake (B 2 ) is engaged.

8. The gear set arrangement ( 10 ; 100 ; 200 ) of claim 1 , wherein the second freewheel clutch (F 2 ) is configured to automatically switch to a locking direction state when the first brake (B 1 ) is engaged.

9. A bicycle gearbox ( 400 ), comprising the gear set arrangement ( 10 ; 100 ; 200 ) of claim 1 .

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Ziemer Peter
• Riedisser Thomas
• Doepfert Hagen
• Doerr Ulrich
• Margraf Christoph
• Deppert Reinhard
• Schraff Uwe
• Grimm Sebastian
• Strobel Markus
• Tiesler Harald
• List Matthias
• Grundler Rainer
• Lippenberger Ingo

Classifications

• B62M11/18

  with a plurality of planetary gear units · CPC title

• F16H3/58

  with sets of orbital gears, each consisting of two or more intermeshing orbital gears · CPC title

• F16H2200/2089

  four freewheel mechanisms · CPC title

• F16H2200/2074

  using four freewheel mechanism · CPC title

• F16H2200/201

  with three sets of orbital gears · CPC title