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Wheel hub driving device of bicycle

A technology of transmission and bicycle, applied in wheel transmission, vehicle parts, vehicle gearbox, etc., can solve the problem of undesired, unbalanced, irregular and other problems of ring gear

Inactive Publication Date: 2003-10-01
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, due to the necessary long axial length of the ring gear and / or uneven or irregular mechanical loading on the ring gear, it may cause undesired oscillation or imbalance of the ring gear in rotation
Inaccurate rotation of the ring gear and planet gears together can impair the power transmission performance of the entire drive train

Method used

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  • Wheel hub driving device of bicycle
  • Wheel hub driving device of bicycle
  • Wheel hub driving device of bicycle

Examples

Experimental program
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Embodiment Construction

[0014] below with attached Figure 1 Various embodiments of the present invention are explained more fully together.

[0015] figure 1 A 3-speed hub transmission according to a first embodiment in which the hub axle 1 is fixed to a bicycle frame (not shown) will be described. The drive part 2 and the hub body 3 are rotatably supported on the hub axle 1 via bearings 63 . The driving member 2 receives driving rotation from the sprocket 2a of the chain and transmits torque to the hub body 3 at 3 speeds, such as high, medium and low, through various transmission paths defined by the planetary gear mechanism. The varying speed control mechanism E is provided with first and second clutches 71, 72 actuated by a control lever 73.

[0016] The first planetary gear mechanism is arranged to mesh with the planetary gears 70 mounted on the planetary gear carrier 75 . Depending on the engagement with the clutches 71 and 72 , the planetary gear 70 rotates around the axis of the carrier 7...

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PUM

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Abstract

A wheel hub transmission device of a bicycle is equipped with a driving part (2) and a wheel hub body (3) rotatably installed on a wheel hub shaft (1). A planetary gear mechanism (7, 70) is provided between the driving part (2) and the hub body (3) to transmit torque from the driving part (2) to the hub body (3) through a plurality of rotational force transmission paths. The variable speed control mechanism (E) includes at least one clutch for selecting a rotational force transmission path. The ring gear guide ring (30, 130) is arranged between the ring gear (7) of the planetary gear mechanism and the hub body (3), and it stabilizes the smooth running of the ring gear (7).

Description

technical field [0001] This invention relates to transmissions for bicycles and in particular to transmissions for inner hub bicycles with 3 or more speeds. Background technique [0002] An internally mounted bicycle transmission is disclosed, for example, in US Patent No. 3,937,309. The inner hub includes a hub axle, a drive member rotatably mounted around the hub axle, a hub body, and a hub connected between the drive member and the hub body for transmitting rotational force from the drive member to the hub body through a plurality of rotational force transmission paths. Planetary gear mechanism. A planetary gear mechanism includes planet gears supported by a planet gear carrier and a ring gear meshing with the planet gears. The transmission provides 3 speeds according to the axial position of the clutch connected to the driving part. [0003] European patent EP 0 531 608 discloses another multi-speed hub transmission up to 7 speeds, in which two planetary gear mechanis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M11/16
CPCB62M11/16
Inventor 正下昭彦
Owner SHIMANO INC
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