CN2047235U

CN2047235U - Coaxial electric boost bicycle

Info

Publication number: CN2047235U
Application number: CN 88219183
Authority: CN
Inventors: 陈士锳; 储毓文; 储小蒨; 邱国平; 崔太湜
Original assignee: 陈士锳
Priority date: 1988-07-07
Filing date: 1988-07-07
Publication date: 1989-11-08

Abstract

The utility model discloses a coaxial electric boosting bicycle which is a novel electric bicycle, and the driving device of the electric boosting bicycle comprises a motor with a hollow shaft, a wandering star gear, a drive gear, a wandering star gear frame, an overrunning clutch, a gear ring and a casing. The coaxial electric boosting bicycle changes the conventional mode of the driving mechanism for the existing electric boosting bicycle, the driving device is arranged totally at the back wheel of the bicycle, and the motive power of the motor can be transmitted in coaxer onto the back wheel and the shaft of the bicycle by adopting the method of speed reducing for the secondary wandering star gear. The utility model has the advantages of small size, light weight, high efficiency and beautiful appearance, and the bicycle can be driven like riding a common bicycle with the manpower for users.

Description

Coaxial electric boost bicycle

The utility model is a kind of improvement to electric assisted bicycle, belongs to the technical field of electric assisted bicycle.

The electric assisted bicycle of selling on the present market, what its speed change and running part adopted all is the gear case speed change, the mechanical transmission mechanism of chain gear, owing to be subjected to the restriction of this body structure of bicycle, its accumulator jar and transmission system all are placed between bottom two wheels of bicycle, in order to drive this car with manpower, it is foot-operated that manually driven also must be housed onboard, because transmission system is placed in the bottom of bicycle, therefore the both sides bending laterally of foot-operated difference, and get relatively and open, when the user drives bicycle with manpower, just feel inconvenience, and require great effort very much.In addition, owing to be subjected to the influence of this bicycle structure, accumulator jar all is contained in the place ahead of own bottom, therefore the center of gravity that causes bicycle partially before, the user is when carrying out going beyond little obstacle such as door and step, and just relatively more difficult, the use object of especially this electric assisted bicycle mostly is old man and women, concerning them, it is just difficult more that this heavier vehicle body was lifted obstacle.

Goal of the invention of the present utility model is exactly that problem at above existence designs.Thereby produce a kind of crankshaft drive formula electric assisted bicycle, this bicycle has simple and compact for structure, and the driving efficiency height does not influence the characteristics of the original performance of bicycle.

Electric assisted bicycle of the present utility model mainly is made up of three parts, and first is the each several part of original bicycle, and second portion is the storage battery that adds, and third part is newly-designed actuating device.Invention main points of the present utility model just are actuating device.Whole actuating device is installed on the axle of bicycle rear.And with the hind axle coaxial line, this actuating device is driven by DC motor (1), motor shaft hollow so that bicycle rear shaft pass through from the centre, the driving gear (2) of driving system is housed on the axle, the deceleration transmission system is a twin-stage pinion gear structure, for obtaining than big retarding ratio and compact conformation, pinion gear is the dual gear that gear (3) and gear (4) are formed, their middle body is a plain bearing, pinion gear has three groups, evenly be contained in the pinion gear axle place on the pinion gear frame (5), pinion gear frame (5) both sides by roller bearings on housing, its Gong leads Shu Chu Duan And overriding clutch (6), and when electrical motor was worked, power drives bicycle rear by it advanced car, when electrical motor is not worked, be manpower when riding, electric boosted structure and trailing wheel are thrown off fully, do not make the anti-translator rotation of wheel.Fixed gear wheel in the pinion gear speed reduction gearing is gear ring (7), and it is fixed on the housing, and whole electric boosted actuating device all in housing (8), forms an integral body, and housing is fixed on the vehicle frame of bicycle.When motor (1) adopted brush motor, housing (8) was fixed on the outside of bicycle rear, and when motor (1) adopted brushless motor, housing was fixed on the centre of trailing wheel inboard.

Adopt crankshaft drive formula electric assisted bicycle of the present utility model, its advantage is:

(1) this car is light from the existing electric assisted bicycle of anharmonic ratio, and its center of gravity moves backward, so the user can move this car with comparalive ease, so that cross little obstacle.

(2) owing to the trailing wheel place that actuating device is put into bicycle, the foot-operated of bicycle just can be cooked equally with ordinary bicycle, and be when driving this car with manpower, just more laborsaving, comfortable like this, can not feel inconvenience.

(3) adopt the wandering star speed reduction gearing coaxial with trailing wheel, its volume is little, and is in light weight, driving efficiency is high.

Figure one is the utility model when being used as power the source with brush motor, is installed in the structural representation of bicycle rear outside.

Figure two is the utility model when adopting brushless motor to be used as power the source, is installed in the structural representation of bicycle rear central authorities.

Specific embodiments of the present utility model is as follows:

Driving gear (2) is fixed on the main shaft of motor (1), and pinion gear (3), (4) are fixed together and form a dual gear, and its core is a plain bearing, and pinion gear has three groups.Be evenly distributed in and be supported in wandering star gear wheel shaft place on the pinion gear frame, pinion gear frame (5) both sides are respectively antifriction-bearing boxs, pinion gear frame (5) by roller bearings on housing, gear ring (7) is fixed on the housing (8), the modulus of the utility model gear is 1, the number of teeth of driving gear (2) is 33, and the number of teeth of pinion gear (3) is 96, and the number of teeth of pinion gear (4) is 32.Motor and all transmission systems all are contained in the housing, and when adopting brush motor, whole actuating device is positioned on the axle in the trailing wheel outside, and when adopting brushless motor, whole device just can be installed in trailing wheel central authorities, and housing (8) adopts the plate stamping moulding.According to the above, just can make crankshaft drive formula electric assisted bicycle of the present utility model.

Claims

1, a kind of electric assisted bicycle is made up of vehicle frame, storage battery and actuating device, it is characterized in that drive part adopts transmission device that the twin-stage pinion gear slows down and is installed together with the trailing wheel coaxial line of bicycle.

2, electric assisted bicycle according to claim 1, it is characterized in that motor (1) adopts hollow shaft motor, the hind axle of bicycle passes from the hollow shaft of motor, and motor (1) and wandering star speed reduction gearing are contained in the same housing (8), forms an integral body.

3, electric assisted bicycle according to claim 1 and 2, it is characterized in that when motor (1) adopts brush motor, housing (8) is fixed on the outside of bicycle rear, and when motor (1) adopted brushless motor, housing (8) was installed in the middle position of bicycle rear.