CN2425798Y - Middle axle and chain wheel device for power-saving bicycle - Google Patents

Abstract

The utility model discloses a center shaft device and a chain wheel device in a power-saving bicycle and comprises a center shaft part and a chain wheel part in a power-saving bicycle. The utility model is composed of a chain wheel (1) with a hole, an internally movable arm (3), an externally movable arm (4), an O-shaped center shaft (5), an outer guard strip (6), a fastening screw (7) of the outer guard strip, fastening screws (8) (9), an isolating iron ring (10), a mounting hole of a pedal, etc. The utility model has the advantages of simple manufacturing process, novel structure, strong applicability, running labor saving, etc.

Description

A kind of axis of labour-saving bicycle and chain gear apparatus

The utility model relates to a kind of labour-saving bicycle driving device.

Bicycle is a kind of simple and easy means of delivery that people are rely and ridden instead of walk and generally use.For these years, people in the axis of making great efforts the reform bicycle and the structural relation of sprocket wheel, are pedaled labour-saving effect more to reach to step on.Now the variable part structure of the variable speed bicycle of generally promoting is exactly an example.But the mechanical structure of the bicycle middle shaft of all manufacturer production and sprocket wheel design now is in irrational lever mechanics operational phase all the time.

The purpose of this utility model be to provide a kind of bicycle chainwheel and axis, coaxial, synchronously, in the same way, with moving, a kind of labour-saving bicycle axis and the chain gear apparatus of split follower structure mode.

The utility model comprises axis and two parts of sprocket wheel of labour-saving bicycle, is made up of sprocket wheel with holes, interior swing arm, outer interior swing arm, outer swing arm, O type axis, outer bluff piece, outer bluff piece holding screw, holding screw, isolation iron hoop, pedal mounting hole etc.O type axis is inserted into the O type end that O type axis is all exposed on the right from the left of axis axle sleeve, is inserted in interior swing arm then, be inserted in sprocket wheel with holes again, be inserted in outer in swing arm, with holding screw.Hole in the insertion, fasten interior swing arm, sprocket wheel with holes, outer in swing arm be inserted in outer swing arm again.At this moment, holding screw inserted following hole again, tighten and fix interior swing arm, sprocket wheel with holes, outer swing arm, the top that at last outer bluff piece is leaned against O type axis is fixed with outer bluff piece screw.Again pedal is inserted from the pedal mounting hole, pack into shading ring simultaneously.

The utility model is according to the power arm in the lever mechanics, and characteristics, fulcrum, stress point that the length of resistance arm changes is in difference and obtains the principle design of different power.Have that technology is simple, novel structure, applicability be strong, moves advantages such as laborsaving.

Accompanying drawings embodiment:

Fig. 1, be a kind of axis and chain gear apparatus integral structure scheme drawing of labour-saving bicycle;

Fig. 2, be a kind of axis of labour-saving bicycle and the assembling scheme drawing of chain gear apparatus.

Learn from Fig. 1～2: the utility model comprises axis and two parts of sprocket wheel of labour-saving bicycle.Form by sprocket wheel 1 with holes, interior swing arm 2, outer interior swing arm 3, outer swing arm 4, O type axis 5, outer bluff piece 6, outer bluff piece holding screw 7, holding screw 8,9, isolation iron hoop 10, pedal mounting hole etc.When assembling, O type axis is inserted into the O type end that O type axis is all exposed on the right from the left of axis axle sleeve, swing arm 2 in being inserted in then, be inserted in sprocket wheel 1 with holes again and be inserted in outer interior swing arm 3, holding screw 8 is inserted upward hole, and fastening interior swing arm 2, sprocket wheel with holes 1, outer interior swing arm 3 are inserted in outer swing arm 4 again.At this moment, will consolidate screw 9 again and insert hole down, tighten swing arm 2 in fixing, sprocket wheel with holes 1, outer in swing arm 3, the top that outer bluff piece 6 leaned against O type axis at last fix with outer bluff piece screw 7, again pedal is inserted from the pedal mounting hole, pack into shading ring 10 simultaneously.

Claims (1)

1, a kind of axis of labour-saving bicycle and chain gear apparatus, axis and two parts of sprocket wheel of comprising labour-saving bicycle, it is characterized in that, by sprocket wheel with holes (1), interior swing arm (2), swing arm (3) in outer, outer swing arm (4) O type axis (5), the outer bluff piece holding screw of outer bluff piece (6) (7), holding screw (8) (9), isolate compositions such as iron hoop (10) pedal mounting hole, O type axis (5) is inserted into the O type end that O type axis is all exposed on the right from the left of axis axle sleeve, be inserted in interior swing arm (2) then, be inserted in sprocket wheel with holes (1) again, be inserted in outer interior swing arm (3), with hole in holding screw (8) insertion, fasten interior swing arm (2), sprocket wheel with holes (1), swing arm (3) is inserted in outer swing arm (4) again in outer, at this moment, the hole is tightened and is fixed interior swing arm (2) under holding screw (9) being inserted again, sprocket wheel with holes (1), swing arm (3) in outer, it is fixing with outer bluff piece screw (7) at last outer bluff piece (6) to be leaned against O type axis (5) top, again pedal is inserted from the pedal mounting hole, pack into shading ring (10) simultaneously.

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