CN2149347Y - Mechanism for transmission of changeable ratio for bicycle - Google Patents

Abstract

The utility model discloses a force saving mechanism for transmission of changeable ratio for a bicycle or a man-power tricycle; the utility model is characterized in that the force saving mechanism for transmission of changeable ratio comprises two pairs of gear sets that are mutually engaged and are respectively installed on two shafts; a gear 1 is fixed on a foot pedal spindle, and a gear 7 and a gear 9 are fixed on a counter shaft 8; a gear 3 and a faceplate 4 are connected together by a sleeve spindle, and are sheathed on a spindle 2; simultaneously the faceplate and the flywheel are adjusted and improved moderately. The utility model has the advantages of labour saving, simple structure, labour saving and quick speed change; compared with ordinary bicycle, the driving speed is faster by 6 meters per hundred meters.

Description

Mechanism for transmission of changeable ratio for bicycle

The utility model relates to a kind of driving device that is specially adapted for bicycle or manual tricycle.

Up to the present, no matter be sell on the market or the disclosed bicycle labor saving transmission system of Chinese patent communique, kind is more, structure is different.Ubiquitous shortcoming is: or complex structure makes the processing and manufacturing difficulty, the cost height; Design unreasonablely, it is inconvenient or the like that rider is manipulated, and therefore causes to be difficult for applying.86208818, No. 87214967 patent applications as Chinese utility model patent communique bulletin just belong to this type of situation respectively.

Goal of the invention of the present utility model be just to overcome above-mentioned the deficiencies in the prior art part and provide a kind of simple in structure, make handling ease, force-saving speed-varying device easy to use.

Goal of the invention of the present utility model can be achieved by following technical measures: by the bicycle labor saving change-speed box that foot-operated crank 6, floral disc 4 and flywheel are formed, also have gear 1, imput shaft 2, gear 3, sleeve 5, gear 7, pay axle 8, gear 9, housing 10.The imput shaft 2 that is parallel to each other is housed in housing 10 and pays axle 8; One end of imput shaft 2 is equipped with sleeve 5, and gear 3 and floral disc 4 are contained in respectively on the sleeve 5, and gear 1 is contained in the other end of imput shaft 2; Gear 7 and gear 9 are contained in successively to be paid on the axle 8, makes gear 7 and gear 3 engagements, gear 9 and gear 1 engagement.The diameter of floral disc 4 and flywheel should be approximately equal.

The drawing of accompanying drawing is described as follows:

The accompanying drawing 1 that is provided is the structural representation of the utility model along the axis bench section; Fig. 2 is a running condition scheme drawing of the present utility model, wherein:

1--gear 2--imput shaft

3--gear 4--floral disc

5--sleeve 6--rides crank

The 7--gear 8--pay axle

9--gear 10--housing

Embodiment: the 5th part of specification sheets and Figure of description have been described a complete embodiment of the present utility model.Its transmission principle is that foot-operated crank 6 rotates by imput shaft 2 driven gears 1, and gear 1 is driven gear 9 and gear 7 rotations again, and gear 7 is driven gear 3 and floral disc 4 rotations again.Floral disc 4 and gear 3 are linked together by sleeve, are sleeved on the imput shaft 2 that links to each other with foot-operated crank and imput shaft 2 does in the same way that friction speed rotates.Floral disc and flywheel diameter are 151mm, 36 teeth in the sample car test.The utility model is sealed to box body, during use, removes former bicycle middle shaft and peripheral part support, is welded in former bicycle middle shaft position and gets final product.

The utility model has the advantages that: 1. more laborsaving than common car on level road, speed is fast, at equal and opposite in direction firmly, in the situation of foot-operated same revolution, per hundred meters than common car fast 6 meters, be that pedal spindle circles, floral disc turned to for 2.53 weeks, exceeded 0.13 than the speed ratio of general common car 2.4; Grade climbing performance strengthens simultaneously, obviously exceeds general car; 2. owing to the traditional using method that does not change bicycle, easy for operation, safe and reliable; 3. little, the good looking appearance of volume does not have impact to car body. The reason that produces above-mentioned advantage is: after using the utility model, make the transmission branch of speed change and the power of bicycle From, dwindle existing bicycle floral disc external diameter and enlarged the flywheel external diameter, equal to have prolonged arm strength, thereby produced the effect of force-saving speed-varying.

Claims (2)

1, bicycle labor saving change-speed box, a kind of driving device that is specially adapted for bicycle or manual tricycle is made up of foot-operated crank 6, floral disc 4 and flywheel; It is characterized in that:

A, have gear 1, imput shaft 2, gear 3, sleeve 5, gear 7, pay axle 8, gear 9, housing 10;

B, the imput shaft 2 that is parallel to each other is housed in housing 10 and pays axle 8; One end of imput shaft 2 is equipped with sleeve 5, and gear 3 and floral disc 4 are contained in respectively on the sleeve 5, and gear 1 is contained in the other end of imput shaft 2; Gear 7 and gear 9 are contained in successively to be paid on the axle 8, makes gear 7 and gear 3 engagements, and gear 7 and gear 9 are contained in successively to be paid on the axle 8, makes gear 7 and gear 3 engagements, gear 9 and gear 1 engagement.

2, bicycle labor saving change-speed box according to claim 1, it is characterized in that: the diameter of floral disc 4 and flywheel is approximately equal.

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