CN2183956Y - Bicycle chain transmission - Google Patents

Abstract

The utility model relates to a driving laborsaving bicycle. Arc-shaped teeth rows are fixed to left and right pedal levers of the bicycle, flywheels are inlaid inside the ends of the two pedal levers, and both ends of a centre shaft are provided with pinions to be meshed with tooth discs on the pedal levers. A block lifting rod is fixed outside a centre shaft sleeve. When the right pedal lever is pedaled by a foot to rotate, the left pedal lever on the other side is driven to rotate conversely and is transferred by the pinions on the centre shaft. The left pedal lever stops when the movable block lifting rod is pushed within 100 DEG. A big tooth disc is driven to rotate and drive the bicycle to go forward by interactive and repeated motions. The driving laborsaving bicycle has the advantages of simple structure, no limitation of the ground height, capability of lengthening one third of the pedal levers, labor saving and high speed.

Description

Bicycle chain transmission

The utility model belongs to transmission mechanism of bicycle improvement technology, is specially adapted to bicycle.

The employed bicycle in present various countries, basic bicycle for old-fashioned physical construction of past, its structure is made up of vehicle frame, wheel and chain transmission mechanism, foot-operated structure be about two foot-driven levers directly be fixed on the axis two ends, two foot-driven levers with straight line each other drive wheel with circumference 360 degree rotations by chain, its shortcoming is to be limited by floor level because of foot-driven lever, its length can not exceed the length of floor level, so can't alleviate full week of pedal power rotation, be difficult to gather way the effort of riding.

For solving the deficiency of above bicycle pedals structure, the purpose of this utility model provides a kind of transmission labour-saving bicycle, improves its traditional foot-operated old-fashioned structure to reach quick labour-saving purpose.

Structure design of the present utility model is achieved in that improved keystone configuration is the transfer device of footstep mechanism axis, detailed structure is that treadle inboard, the bicycle left and right sides relatively is fixed with the camber tooth row under the axis hole, embed flywheel in the welding of the front end axis hole position of two treadles, the axle two ends penetrates from the flywheel centre hole among in bottom bracket axle, one of outside end is with fixed by nut, the other end outside is with large fluted disc, large fluted disc external application fixed by nut, two ends at axis, be fixed with miniature gears respectively near the treadle inboard, miniature gears and fluted disc interlock separately, outside the left end of bottom bracket axle, be fixed with and stop lifting bar, the termination is 90 ° of bendings, and chain is housed on the large fluted disc, and two treadles are not subjected to the floor level restriction can extend 1/3rd.

Its detailed structure is provided by following examples and accompanying drawing.

Fig. 1 is a kind of transmission labour-saving bicycle structure principle chart.

Its structure is by shown in the accompanying drawing, middle 1 is bottom bracket axle, 2 is axis, intrinsic miniature gears 3 in axis 2 two ends and 3A, both sides 4 and 4A are foot-driven lever, be fixed with on the foot-driven lever 5 and 5A be the arc fluted disc, with 3 and the 3A interlock, 6 fixing and 6A of top is flywheel, be embedded in the treadle termination, the bottom bracket axle 1 right-hand member outside is fixed with and stops lifting bar 8, and top 90 degree are crooked, and one end has large fluted disc 7 in the treadle outside, two ends are by fixed by nut, the fluted disc cylindrical connects chain 9, two treadles (4) and (4A) is not subjected to the floor level restriction can extend 1/3rd, and obtains to economize stress effect.

During use, when right crus of diaphragm steps right treadle (4), left side treadle (4A) can tightly be stung on the treadle institute's tooth row that stays (5A) backwards rotation (4A) by means of the miniature gears (3A) on the axis (2) and raise to press stop that lifting bar (8) stops greatly in 100 degree scopes, and mutual perseveration left and right sides treadle (4) (4A) drives to large fluted disc (7) again through axis (2) and promotes bicycle and advance.

The advantage of the utility model: be added with the gear transmission structure at axis, and be not subjected to ground level restriction treadle length, treadle can lengthen 1/3rd, and is laborsaving, and speed is fast.

Claims (3)

1, a kind of transmission labour-saving bicycle, form by wheel, vehicle frame and chain transmission mechanism, it is characterized in that bicycle left and right sides treadle (4), (4A) inboard relatively is fixed with camber tooth row (5) under the axis hole. (5A), two treadles (4) front end axis hole position welding (4A) embeds flywheel (6). (6A), axis (2) two ends is from flywheel (6). and (6A) centre hole penetrates, large fluted disc (7) is equipped with in right treadle (4) outside, two ends is fastening with nut then, be fixed with miniature gears (3) at axis (2) two ends, (3A) with arc tooth row (5), (5A) interlock.

2,, it is characterized in that being fixed with and stop that lifting bar (8), termination are 90 ° of bendings in bottom bracket axle (1) the right-hand member outside by the described labour-saving bicycle of claim 1.

3, by the described labour-saving bicycle of claim 1, it is characterized in that left and right sides treadle (4) length (4A) can extend 1/3rd.

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