Hub shell for bicycle generator hub

Patent metadata

Field	Value
Publication number	US-9502935-B2
Application number	US-201213595767-A
Country	US
Kind code	B2
Filing date	Aug 27, 2012
Priority date	Dec 20, 2011
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A hub shell is used as a part of a bicycle generator hub. The hub shell comprises a main body and a magnet arrangement section. The main body has a tubular shape with an internal circumferential surface. The magnet arrangement section is provided on the internal circumferential surface of the main body to arrange a magnet formed therein by injection molding. The magnet arrangement section includes an even section and a non-even section, the non-even section being configured as one of a recess and a protrusion with respect to the even section.

First claim

What is claimed is:

1. A hub shell for a bicycle generator hub comprising:
a main body having a tubular shape with an internal circumferential surface, the internal circumferential surface of the main body including a magnet arrangement section, the magnet arrangement section including a linear-shaped recess formed in the internal circumferential surface; and
a magnet injection molded on the magnet arrangement section of the main body such that the magnet enters into the recess, the magnet being a bond magnet made of a mixture of a magnetic material and a synthetic resin, the magnet forming a radially innermost surface of the hub shell at the magnet arrangement section.

2. The hub shell according to claim 1 , wherein
the recess includes a first section that has a linear shape and extends in an axial direction of the main body, and a second section that has a linear shape and extends in a circumferential direction of the main body.

3. A bicycle generator hub including e hub shell according to claim 1 , the bicycle generator hub comprising:
a hub axle rotatably disposed in the main body of the hub shell; and
a stator fixed to the hub axle.

4. The hub shell according to claim 1 , wherein
the magnetic material is a magnetic powder.

5. The huh shell according to claim 1 , wherein
the recess has a helical shape.

6. The hub shell according to claim 1 , wherein
the recess has an endless shape.

7. The hub shell according to claim 6 , wherein
the recess includes a plurality of recesses having an endless shape.

8. A hub shell for a bicycle generator hub comprising:
a main body having a tubular shape with an internal circumferential surface;
a magnet arrangement section provided on the internal circumferential surface of the main body to arrange a magnet formed therein by injection molding, the magnet arrangement section being disposed in an axially middle portion of the internal circumferential surface such that the magnet arrangement section faces a coil disposed radially inward of the magnet arrangement section when the hub shell is installed in the bicycle generator hub; and
a magnet injection molded onto the magnet arrangement section of the main body, the magnet being a bond magnet made of a mixture of a magnetic material and a synthetic resin;
the magnet arrangement section including an even section and a non-even section, the non-even section being configured as one of a recess and a protrusion with respect to the even section, the non-even section having a linear shape and extending non-parallel with respect to each of an axial direction and a circumferential direction of the main body, the magnet covering the even section and the non-even section such that the magnet forms a radially innermost surface of the hub shell at the magnet arrangement section.

9. The hub shell according to claim 8 , wherein
the non-even section has a helical shape.

10. The hub shell according to claim 8 , wherein
the non-even section has an endless shape.

11. The hub shell according to claim 10 , wherein
the non-even section includes a plurality of separate non-even sections.

12. The hub shell according to claim 8 , wherein
the non-even section is configured as a recess.

13. The hub shell according to claim 12 , wherein
the non-even section has a helical shape.

14. The hub shell according to claim 12 , wherein
the non-even section has an endless shape.

15. The hub shell according to claim 14 , wherein
the non-even section includes a plurality of separate non-even sections.

16. A hub shell for a bicycle generator huh comprising:
a main body having a tubular shape with an internal circumferential surface, the internal circumferential surface of the main body including a magnet arrangement section, the magnet arrangement section including a linear-shaped protrusion with respect to the internal circumferential surface, the protrusion having a helical shape; and
a magnet injection molded on the magnet arrangement section of the main body such that the magnet enters around the protrusion and forms a radially innermost surface of the hub shell at the magnet arrangement section, the magnet being a bond magnet made of a mixture of a magnetic material and a synthetic resin, the magnet forming a radially innermost surface of the hub shell at the magnet arrangement section.

Assignees

• Hasegawa Hiroshi
• Nakabayashi Akira
• Shimano Kk

Inventors

• Hasegawa Hiroshi
• Nakabayashi Akira

Classifications

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• B60B27/026

  comprising quick release devices · CPC title

• B62J6/12

  Dynamos arranged in the wheel hub · CPC title

• H02K1/2786 Primary

  Outer rotors · CPC title

• H02K1/2791 Primary

  Surface mounted magnets; Inset magnets · CPC title