Prime-mover dynamo plants – Miscellaneous – Drive gearing
Patent
1988-11-17
1991-05-14
Pellinen, A. D.
Prime-mover dynamo plants
Miscellaneous
Drive gearing
H02K 718
Patent
active
050158694
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a dynamo for/on bicycles, comprising a housing receiving a stator and a rotor and securable to a bicycle, a drive member setting the rotor in rotary motion and being driven by a bicycle wheel.
Known dynamos of this type are attached to the bicycle fork and have a small wheel as a drive member, which rolls against the tire. The disadvantage thereof is that frequently rotation of the small wheel does not occur because of dirt or because of snow and ice, but rather the small wheel slips against the tire, so that no current can be generated. The possibility also arises of the fastening of the dynamo to the wheel fork becoming loose and the dynamo then getting between the spokes, which leads to accidents.
Furthermore, dynamos are known, which comprise a wide pressure roll, which also rolls against the tire. The same disadvantages of slip and a shortage of current generation also arise here.
Moreover, the drive members' rolling against the tire can damage the tire with prolonged use.
The problem on which the invention is based is that of providing a simply and economically constructed dynamo, which, on the one hand, can be attached securely to the bicycle and, on the other hand, achieves consistently certain and optimum transmission of motion from the bicycle wheel, but not from the tire, for current generation.
SUMMARY OF THE INVENTION
This problem is solved according to the invention by the characterizing features of claim 1, the design features given in the subclaims also representing advantageous developments of the solution to the problem.
The subject matter of the invention extends not only to the features of the individual claims, but also to combinations thereof.
The dynamo according to the invention is simply and economically constructed and can be attached simply and securely to the bicycle. The dynamo is mounted in a preferred way on a wheel axle, preferably the front wheel axle, of the bicycle and then effectively represents an axle dynamo.
For the transmission of the rotary motion from the wheel to the rotor a drive member, preferably a gear wheel or revolving housing cover, is mounted centrally on the wheel axle and connected firmly to the wheel or connectable kinematically to the wheel spokes by means of an engaging and disengaging mechanism, and this drive member delivers its rotary motion, determined by the wheel movement, via gearing to the rotor, which lies in coaxial or eccentric relation to the wheel axle, so that the transmission of the rotary motion occurs away from the tire and is consequently not impaired by outside influences, such as dirt, snow or ice, since no slipping or sliding movements can arise because of the torsionally secure connection of the drive member and the wheel.
The drive member, gearing, stator and rotor are accommodated in an externally sealed housing and form a compact structural unit with the housing.
The dynamo can be carried torsionally securely on the bicycle by being mounted on the wheel axle in connection with the wheel fork. Moreover, it is also possible for the dynamo to be mounted away from the wheel axle on the wheel fork, its gearing then also being connected to the drive member seated on the wheel axle.
The dynamo can easily be added without difficulty to any bicycle.
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments according to the invention are described in more detail below with the aid of drawings, in which:
FIG. 1 shows a perspective view of a bicycle with a dynamo arranged on the front wheel axle,
FIG. 2 shows a vertical section through the dynamo arranged on the wheel axle,
FIG. 3 shows a horizontal section through the same dynamo,
FIG. 4 shows a side view of another embodiment of a dynamo in position mounted on the front wheel axle,
FIG. 5 shows a front view of the dynamo according to FIG. 4,
FIG. 6 shows a vertical half section through the same dynamo,
FIG. 7 shows a lateral view of a dynamo in another embodiment, and
FIG. 8 shows a section through the dynamo according to the sec
REFERENCES:
patent: 1111864 (1914-09-01), Sanladerer
patent: 4555656 (1985-11-01), Ryan
Gudereit Bernd
Schurmann Dieter
Duncanson Jr. W. E.
Pellinen A. D.
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