Structure of transmission for bicycle
First Claim
1. A derailleur-type transmission for a bicycle, the transmission being mountable to a frame of the bicycle, said transmission comprising:
- a transmission case, said transmission case being dividable into left and right cases, the left and right cases of the transmission case being provided with left and right bosses, respectively, the left and right bosses coaxially projecting inwardly of the transmission case; and
a derailleur shaft, said derailleur shaft being supported by the left and right bosses.
1 Assignment
0 Petitions
Accused Products
Abstract
To achieve downsizing and weight reduction of a derailleur shaft and the mounting structure thereof and to improve the rigidity of the derailleur shaft without increasing the thickness thereof more than necessary. A transmission case is divided into left and right halves, and the left and right halves are provided with bosses therein having holes opposing each other. The bosses are brought into abutment with each other and united by fitting tightening bolts to the holes of the bosses and tightening the same. A sleeve-shaped derailleur shaft is fitted on the outer periphery of the bosses to support and mount the derailleur shaft. The derailleur shaft includes a hole at the shaft end thereof. A mounting position of the derailleur shaft is achieved by a pin inserted into the hole and a hole provided on one of the cases.
40 Citations
18 Claims
-
1. A derailleur-type transmission for a bicycle, the transmission being mountable to a frame of the bicycle, said transmission comprising:
-
a transmission case, said transmission case being dividable into left and right cases, the left and right cases of the transmission case being provided with left and right bosses, respectively, the left and right bosses coaxially projecting inwardly of the transmission case; and
a derailleur shaft, said derailleur shaft being supported by the left and right bosses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A bicycle, comprising:
-
a frame, said frame including a pair of left and right main frames extending from a head pipe rearward and obliquely downward, a down tube extending from front lower ends of the pair of main frames rearward and obliquely downward, a saddle frame extending rearward from for the pair of mainframes;
a saddle, said saddle being supported by the saddle frame;
a pair of left and right front forks, said pair of front forks being supported by the head pipe and supporting a front wheel;
a pair of left and right swing arms, said pair of swing arms being supported by the main frames and supporting a rear wheel;
a derailleur-type transmission, the transmission being mounted to the frame, said transmission including;
a transmission case, said transmission case being dividable into left and right cases, the left and right cases of the transmission case being provided with left and right bosses, respectively, the left and right bosses coaxially projecting inwardly of the transmission case; and
a derailleur shaft, said derailleur shaft being supported by the left and right bosses. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
Specification