Electric assist device for a bicycle and electrically assisted bicycle provided with such a device
First Claim
Patent Images
1. An electrical assist device for a bicycle, the device comprising:
- an electric machine that includes a rotor;
a drive pinion structured to be driven by the rotor of the electric machine, the drive pinion including teeth;
an articulating structure that includes an oscillating arm, which carries the electric machine, and a support portion, which is fastened to the bicycle in a vicinity of a tire of a wheel of the bicycle, the support portion being in a fixed position relative to the bicycle, and the oscillating arm being arranged to pivot about a pivot axis with respect to the support portion; and
a source of electrical energy for powering the electric machine,wherein the teeth of the drive pinion are structured to mesh tangentially with complementary teeth attached to the tire.
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Abstract
An electrical assist device is provided for a bicycle. The device includes an electric machine, a drive pinion, an attachment device, a source of electrical energy, and a controller. The attachment device fixes the electric machine to the bicycle near a tire of a wheel of the bicycle. The source of electrical energy powers the electric machine. The controller controls the electric machine. The electric machine includes a rotor, which drives the drive pinion. The drive pinion includes teeth structured to mesh tangentially with complementary teeth fastened to the tire.
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Citations
18 Claims
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1. An electrical assist device for a bicycle, the device comprising:
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an electric machine that includes a rotor; a drive pinion structured to be driven by the rotor of the electric machine, the drive pinion including teeth; an articulating structure that includes an oscillating arm, which carries the electric machine, and a support portion, which is fastened to the bicycle in a vicinity of a tire of a wheel of the bicycle, the support portion being in a fixed position relative to the bicycle, and the oscillating arm being arranged to pivot about a pivot axis with respect to the support portion; and a source of electrical energy for powering the electric machine, wherein the teeth of the drive pinion are structured to mesh tangentially with complementary teeth attached to the tire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16)
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10. An electrical assist kit for a bicycle, the kit comprising:
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a pneumatic tire having teeth attached thereto; and an electrical assist device for the bicycle, the device including; an electric machine that includes a rotor, a drive pinion structured to be driven by the rotor of the electric machine, the drive pinion including teeth, an articulating structure that includes an oscillating arm, which carries the electric machine, and a support portion, which is fastened to the bicycle in a vicinity of a tire of a wheel of the bicycle, the support portion being in a fixed position relative to the bicycle, and the oscillating arm being arranged to pivot about a pivot axis with respect to the support portion, and a source of electrical energy for powering the electric machine, wherein the teeth of the drive pinion complement the teeth attached to the tire, and the teeth of the drive pinion are structured to mesh tangentially with the teeth attached to the tire. - View Dependent Claims (11, 12, 13, 17)
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14. A bicycle comprising:
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a pneumatic tire having teeth attached thereto; and an electrical assist device for the bicycle, the device including; an electric machine that includes a rotor, a drive pinion structured to be driven by the rotor of the electric machine, the drive pinion including teeth, an articulating structure that includes an oscillating arm, which carries the electric machine, and a support portion, which is fastened to the bicycle in a vicinity of a tire of a wheel of the bicycle, the support portion being in a fixed position relative to the bicycle, and the oscillating arm being arranged to pivot about a pivot axis with respect to the support portion, and a source of electrical energy for powering the electric machine, wherein the teeth of the drive pinion complement the teeth attached to the tire, and the teeth of the drive pinion are structured to mesh tangentially with the teeth attached to the tire. - View Dependent Claims (15, 18)
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Specification