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Hub generator for bicycle

A technology for hub generators and bicycles, which is applied to synchronous generators, bicycle accessories, synchronous motors with stationary armatures and rotating magnets, etc. It can solve the problems of stable shape and dimension accuracy of stator cores or cylindrical cores, and achieve the best shape Dimensional accuracy stabilization, eddy current loss suppression, eddy current suppression effect

Inactive Publication Date: 2011-07-20
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the conventional hub generator, in order to suppress the eddy current loss and improve the power generation efficiency, slits are formed in the stator core or the cylindrical core, so it is difficult to stabilize the accuracy of the external dimensions of the stator core or the cylindrical core.

Method used

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  • Hub generator for bicycle
  • Hub generator for bicycle
  • Hub generator for bicycle

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Embodiment Construction

[0036] figure 1 It is a sectional view of one side (upper part) including the hub axis direction of the hub generator 30 of the present invention, figure 2 is an exploded front sectional view of the stator 19, image 3 is a side view of the stator core 16, 17, Figure 4 is an enlarged perspective view of the main part of the stator 19, Figure 5 An enlarged view showing a front wheel portion of a bicycle 40 on which the hub dynamo 30 is mounted.

[0037] The hub dynamo 30 of the present invention is mounted on the front wheel portion or the rear wheel portion of the bicycle 40 . Hereinafter, an example in which the hub dynamo 30 is mounted on the front wheel side will be described.

[0038] Such as Figure 5 As shown, in the bicycle 40, the hub axle 10 that supports the front wheel 42 so as to be rotatable is mounted on the front fork 44, and the hub dynamo 30 is arranged toward the headlight 46 arranged on the lateral side of the front wheel 42 or arranged on the rear w...

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Abstract

An aim of the invention is to provide a hub generator which can restrain eddy current loss without equipping a slit on a stator core or a cylindrical core thereby improving power generating efficiency. In the hub generator (30) for bicycle, permanent magnets (14) are provided at the inside part of a hub body (12). A hub shaft (10) is provided with two stator cores (16,17) which are provided with a plurality of pole sheets (74,75) that corresponds with the pole sheets of the permanent magnet on the circumferential part, and a coil (22) which is coiled on a coil frame (20) between the stator cores, wherein, the two stator cores are magnetically combined at the hub shaft side through cylindrical core parts (84a,84b) (which constitute the cylindrical core (84) together), and the stator core and / or each cylindrical core is made of powder magnetic core. The cylindrical core part and the stator cores can be formed integrally or separately.

Description

technical field [0001] The present invention relates to a bicycle hub dynamo as a bicycle dynamo. Background technique [0002] Conventionally, a hub dynamo for a bicycle is configured as shown in Patent Document 1, in which a permanent magnet is arranged inside a hub body of the bicycle, and a plurality of pole pieces opposed to the pole pieces of the permanent magnet are provided on the periphery. The two stator cores are disposed on the hub shaft to face each other, and a coil is wound around the bobbin disposed between the stator cores. More specifically, the two stator cores are magnetically coupled by the cylindrical core on the hub shaft side, and the coil wound on the bobbin is disposed outside the cylindrical core between the two stator cores. [0003] The two stator cores are made of rolled steel for general structural use, and slits are formed toward the outer circumference from the center hole through which the hub shaft passes to suppress eddy current loss. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62J6/12H02K19/22H02K21/22
Inventor 福田齐
Owner SANYO ELECTRIC CO LTD
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