CN2300570Y

CN2300570Y - Lever type power-aid bicycle

Info

Publication number: CN2300570Y
Application number: CN 97221130
Authority: CN
Inventors: 王克强
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-11
Filing date: 1997-07-11
Publication date: 1998-12-16
Anticipated expiration: 2007-07-11

Abstract

The utility model relates to a lever-type power-assisted bicycle, which is characterized in that the central axis of a common tricycle or a common bicycle is moved backwards; a pedal part is additionally provided with a connecting rod and a rocker; the rocker and a chain wheel are driven to rotate by the connecting rod; the length of the connecting rod is greatly larger than the length of the original pedal rod, thus the utility model has labor saving; a rider can obtain high speed with small force in proximity to the original pedal moving range without discomfort. The utility model has easy implementation, and can be realize by that the common bicycle is changed slightly; the cost of the utility model corresponds to the cost of the common bicycle.

Description

Lever power-assisted bicycle

The utility model belongs to technical field of bicycles.

Existing ordinary bicycle, employing be arbor wheel formula foot-driven lever, if will keep the speed of a motor vehicle constant and laborsaving, can only be by increasing foot-driven lever, and the structural limitations of existing ordinary bicycle the growth of foot-driven lever, will bring sense of discomfort to people by bike if increase.Existing variable speed bicycle is recently realized quickening by adopting big steamboat to exchange to change transmission, but if will reach the purpose of acceleration, then must be with exchanging for greater than the power of riding ordinary bicycle, like this, if will keep constant then can not the realization of strength to quicken.If adopt existing power operated boosted vehicle as engine petrol or storage battery driving, though not only laborsaving but also can improve the speed of a motor vehicle, its price is far above ordinary bicycle, moreover the traffic law in some city does not allow its use yet.

The purpose of this utility model will overcome above-mentioned the deficiencies in the prior art exactly, compares with ordinary bicycle and provide a kind of, and available less strength obtains the higher speed of a motor vehicle, and cost is lower than the lever power-assisted bicycle of power driven boosted vehicle.

Design of the present utility model is such: the axis and the sprocket wheel of ordinary bicycle are moved to the back wheels of vehicle direction, in the axis both sides left and right sides rocking arm is arranged respectively; the square key that an end of rocking arm has square groove and axis two ends is connected; rocking arm and sprocket wheel near sprocket wheel one side are fixed; the other end of two rocking arms is connected with two connecting rods respectively by bolt; be provided with antifriction-bearing box between bolt and connecting rod; the front end of each connecting rod is a stretcher; there is a pulley rear end; bolt together; bolt and pulley room have antifriction-bearing box, and pulley base drops in the sliding tray that is located at bottom of frame.When stepping stretcher, connecting rod drives the rocking arm rotation, thereby sprocket wheel rotation, the pulley of rod rear end does reciprocating linear motion in sliding tray, form four-bar linkage, because the length of connecting rod pivot center to the length of stretcher much larger than the ordinary bicycle foot-driven lever according to the principle of lever, has promptly realized obtaining with less strength the purpose of fair speed.

The utility model has the advantages that, more existing bicycle, three-wheel vehicle are laborsaving, do not increase usual amount of exercise by bike and just can obtain higher speed, and cost is far below the power driven boosted vehicle, and very easily implement, only need existing bicycle is carried out just changing lessly and can realize.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model structural plan arrangement plan.

Fig. 3 is the utility model structure scheme of installation.

Wherein: the 1-stretcher; The 2-connecting rod; The 3-antifriction-bearing box; The 4-pulley; The 5-sprocket wheel; The 6-axis; The 7-rocking arm; The 8-square key; The 9-nut; The 10-bolt; The 11-pad; The 12-nut; The 13-bolt; The 14-antifriction-bearing box; The 15-sliding tray; 16-three-wheel vehicle Vee formation frame; 17-three-wheel vehicle underframe.

Provide embodiment of the present utility model below in conjunction with accompanying drawing.

A kind of by handlebar, vehicle frame, vehicle seat, front and back wheel, axis is arranged, sprocket wheel, the lever power-assisted bicycle that the transmission device of chain is formed, as Fig. 1～shown in Figure 3, it is characterized in that, axis each side has a rocking arm 7; square key 8 that an end of rocking arm 7 has square groove and axis 6 two ends is connected; rocking arm and sprocket wheel 5 near sprocket wheel 5 one sides are fixing; the other end of rocking arm 7 is connected with connecting rod 2 with bolt 10; between bolt 10 and the connecting rod 2 antifriction-bearing box 3 is arranged, the front end of connecting rod 2 has stretcher 1, and the rear end connects a pulley 4 with bolt 13; 4 on bolt 13 and pulley have antifriction-bearing box 14, and pulley 4 is located in the sliding tray 15 that is located on the under-carriage.The utility model can be implemented on common three-wheel vehicle, concrete grammar is, with former three-wheel vehicle axis 6, move behind the sprocket wheel 5, with original foot-driven lever as rocking arm 7, installing connecting rods 2, pulley 4, axis 6 is fixed on the three-wheel vehicle Vee formation support 16 by axle sleeve, sliding tray 15 is fixed on the three-wheel vehicle underframe 17, gets connecting rod rotation axis points 0 to the length of stretcher 1 and equals or be slightly larger than the distance that axis 6 moves backward, and the rider can step stretcher near in the original range of movement, connecting rod drives rocking arm 7 and makes circular movement, thereby drive sprocket wheel, chain movement drives trailing wheel, and pulley 4 makes to come and go straight-line motion in sliding tray 15.The utility model also can be used for the transformation to two wheel bicycles.

Claims

1, a kind of by handlebar, vehicle frame, vehicle seat, front and back wheel, axis is arranged, sprocket wheel, the lever power-assisted bicycle that the transmission device of chain is formed, it is characterized in that, axis each side has a rocking arm 7; square key 8 that an end of rocking arm 7 has square groove and axis 6 two ends is connected; rocking arm and sprocket wheel 5 near sprocket wheel 5 one sides are fixing; the other end of rocking arm 7 is connected with connecting rod 2 with bolt 10; between bolt 10 and the connecting rod 2 antifriction-bearing box 3 is arranged; be the rotation axis points 0 of connecting rod 2, the front end of connecting rod 2 has stretcher 1, and the rear end connects a pulley 4 with bolt 13; 4 on bolt 13 and pulley have antifriction-bearing box 14, and pulley 4 is located in the sliding tray 15 that is located on the under-carriage.

2, according to the said lever power-assisted of claim 1 bicycle, it is characterized in that, it is to move behind the axis 6 of former three-wheel vehicle, the sprocket wheel 5, axis 6 is fixed on the three-wheel vehicle Vee formation support 16 by axle sleeve, the foot-driven lever of former three-wheel vehicle is rocking arm 7, sliding tray 15 is fixed on the three-wheel vehicle underframe 17, gets connecting rod rotation axis points 0 to the length of stretcher 1 and equals the distance that axis 6 moves backward.