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Multi-speed driving gear hub for bicycles

A technology for bicycles and transmission wheels, which is applied to multi-ratio transmissions, transmission components, transmissions, etc. It can solve the problems of complex mechanical structures and high processing costs of transmission hubs, and achieve axial compression and compact structure and good handling. Effect

Active Publication Date: 2011-06-15
SRAM
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

On the other hand, the transmission hub is a complex mechanical structure, which determines the high processing cost

Method used

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  • Multi-speed driving gear hub for bicycles
  • Multi-speed driving gear hub for bicycles
  • Multi-speed driving gear hub for bicycles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] figure 1 A schematic diagram of a preferred embodiment of the drive hub according to the invention is shown, here only the half above the hub axle 7 including the hub axle 7 is shown. The hub axle is not shown.

[0047] A drive movement is introduced at the drive element 1 , where, during the forward rotational movement, the rotation is carried via the drive element freewheel clutch 11 to the input of the first transmission stage I on the first ring gear 3 . The first-stage planetary gears 5 and the second-stage planetary gears 6 are mounted on the planetary gear carriers 2a and 2b. The first planetary gear stage 5 has a first planetary gear 51 , a second planetary gear 52 and a third planetary gear 53 , which are coupled to one another in a rotationally fixed manner. in accordance with figure 2 In the sectional view of , one planet gear 51 , 52 or 53 can be seen in each case. Of course, there are other circumferentially spaced planetary gears belonging to the same...

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PUM

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Abstract

The invention relates to a multi-speed driving gear hub for a bicycle, which is provided with two driving gear stages. A clutch between a sun gear provided with more teeth and a hub axle and fixing the sun gear relative to the hub axle in a rotating direction requires a structural space as planetary gear teeth only in axial extension. Therefore, a planetary gear driving mechanism only needs a smaller axial length. Via the above way, the structure can be realized, a direct driving gear stage with a gear ratio of 1:1 is not used in a driving gear stage provided with a superfine grading of a driving gear stage gear ratio. A more advantageous aspect is a practice mode when a first and second driving gear stages are joined on a planetary gear rack.

Description

technical field [0001] The invention relates to a bicycle multi-speed transmission hub including a planetary gear transmission mechanism. Background technique [0002] Planetary gears have a long history of development and were then equipped with as many as 14 gears, each of which corresponds to an engageable and thus selected torque path through the planetary gear. A significant advantage of a bicycle drive hub over a bicycle chain shifter is that it is simple to maintain because the drive is located in the hub housing and has simple operability by operating a single switch. On the other hand, the transmission hub is a complex mechanical structure, which determines the high processing cost. Contents of the invention [0003] The object of the invention is a simplified construction which is less demanding for manufacture and installation. [0004] This object is achieved by means of a number of interrelated solutions. [0005] In the planetary gear train, more gears are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M11/16
CPCF16H2200/2023F16H2200/2025B62M11/18F16H2200/0065B62M11/16F16H3/663F16H2200/2007
Inventor 约阿希姆 格贝尔
Owner SRAM
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