Derailleur hanger with insertion aid
The invention relates to a derailleur hanger for a bicycle having an insertion aid for inserting the wheel hub between the dropouts of a fork or frame. A derailleur hanger ( 10 ) for a bicycle according to the invention having, on a first dropout ( 1 ) and/or on a second dropout ( 2 ), first and second recesses ( 3, 4 ), respectively, for receiving the corresponding ends ( 31, 32 ) of a wheel hub ( 30 ) is characterized in that the derailleur hanger ( 10 ) is configured such that the shape of a lateral surface ( 5 ) of the recess ( 4 ) is substantially steadily continued by a first guide surface ( 12 ) of the derailleur hanger ( 10 ).
1. A device for aiding in the mounting of a wheel hub to a bicycle of the type including a through-axle, the device comprising:
at least one dropout adapted to be fixed to the bicycle and defining an aperture for receiving the through-axle and comprising a recess adapted to receive an end of the wheel hub when the wheel hub is mounted to the bicycle, the recess defined by a first lateral surface and a first support surface, and
a derailleur hanger comprising a second lateral surface and a second support surface, wherein the first and second lateral surfaces together define a substantially continuous lateral guide surface and the first and second support surfaces together define a substantially continuous longitudinal guide surface that is generally perpendicular to the lateral guide surface, wherein during the mounting of the wheel hub, the lateral guide surface and the longitudinal guide surface are adapted to permit the wheel hub to be guided into alignment with the aperture with the lateral guide surface limiting movement of the wheel hub in a direction generally perpendicular to an axis of rotation defined by the wheel hub, and the longitudinal guide surface limiting the movement of the wheel hub in a direction along the axis of rotation defined by the wheel hub.
2. The device of claim 1 , wherein the derailleur hanger defines at least a first hole for receiving a fastening bolt for a derailleur.
3. The device of claim 1 , wherein the derailleur hanger is configured as a part separate from the at least one dropout and is releasably attached to the at least one dropout by at least one dropout fastening bolt.
4. The device of claim 3 , wherein the at least one dropout fastening bolt extends in a direction substantially perpendicular to the axis of rotation defined by the wheel hub.
5. The device of claim 3 , wherein the derailleur hanger defines a threaded hole into which the at least one dropout fastening bolt is threaded.
6. The device of claim 3 wherein the derailleur hanger further comprises a pin and the at least one dropout defines an alignment hole, wherein the pin engages with the alignment hole when the derailleur hanger is attached to the at least one dropout.
7. The device of claim 3 , wherein the derailleur hanger further includes an anti-rotation element which prevents twisting of the derailleur hanger relative to the at least one dropout when the derailleur hanger is attached to the at least one dropout.
8. The device of claim 1 , wherein the derailleur hanger is made of a material selected from the group consisting of metals, metal alloys, carbon fiber materials, plastics, fiber-reinforced plastics, composites of such materials, and combinations thereof.