SUPPORTING STRUCTURE OF CRANK FOR BICYCLE

PROBLEM TO BE SOLVED: To allow increasing the centering accuracy, to extend the service life of a bearing, to reduce the center slippage by the distortion under a high load, and to reduce the bending load exerted on a crankshaft so as to increase the actual strength of the crankshaft. SOLUTION: This...

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Bibliographische Detailangaben
1. Verfasser:	HIROSE SHINICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CYCLES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS PERFORMING OPERATIONS POWERED PROPULSION OF SLEDGES OR RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To allow increasing the centering accuracy, to extend the service life of a bearing, to reduce the center slippage by the distortion under a high load, and to reduce the bending load exerted on a crankshaft so as to increase the actual strength of the crankshaft. SOLUTION: This structure is to support a crankshaft for bicycle provided with a crankshaft 10 inserted to a hanger pipe HP; the first crank arm 20a connected to one side end of the crankshaft, and installing a chain wheel 40; and the second crank arm 20b connected to the other side end of the crankshaft 10; rotatable by making the crankshaft 10 as the center, and it has the first support member 30a fixed to one end part of the hanger pipe HP, or formed integral; and the second support member 30b fixed to the other end part of the hanger pipe HP, or formed integral. And bearings 6a and 6b are provided between the first support member 30a and the first crank arm 20a, and between the second support member 30b and the second crank arm 20b, respectively.