CN201128463Y

CN201128463Y - Middle axle driven electric bicycle

Info

Publication number: CN201128463Y
Application number: CNU2007201904884U
Authority: CN
Inventors: 马贵龙; 马跃波
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-10-08
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to a centre shaft transmission electric bicycle and belongs to the technical field of electric motor car. The bicycle mainly comprises a bicycle body consisting of a vertical pipe, an oblique girder, a vertical fork and a horizontal fork, a steering handle, a braking handle, a front wheel, a back wheel, a controller and a battery box which are installed at the bicycle body, a centre shaft installed inside a five-way pipe of the bicycle body and a foot pedal installed at the centre shaft. The centre shaft transmission electric bicycle is characterized by also comprising an inner rotor hollow spindle motor which is installed inside the five-way pipe and is mounted at the centre shaft by a bearing; the outer end of a motor hollow spindle is provided with a flywheel which is connected with a back wheel gear by a chain. The centre shaft transmission electric bicycle has the advantages of simple and compact structure, light weight, good heat dissipation, strong capacity for grade climbing, good function of being ridden by manpower etc.

Description

Middle shaft drive Electrical Bicycle

Technical field

The utility model belongs to the vehicle technology field, particularly to the improvement of Electrical Bicycle transmission device.

Background technology

Existing electric two-wheel vehicle (containing Electrical Bicycle, light-weight electric boosted vehicle) mostly is that rear wheel hub motors drives.Its complete vehicle structure as shown in Figure 1, mainly comprise: by standpipe 101, tiltedly the car body that constitutes of fine strain of millet 102, upright fork 103 and chain stay 104, be installed in handle, brake lever 13 on the oblique fine strain of millet 102, be installed in front-wheel 111 on the upright fork 103, be installed in controller 13, trailing wheel 112 on the chain stay 104, be installed in the saddle 12 on the standpipe, be installed in standpipe, the oblique axis 14 in the five-way pipe of the intersection of fine strain of millet and chain stay and be installed in pedal 15 on the axis, battery case 16 be installed and be directly installed on wheel hub motor 17 on the trailing wheel on standpipe 101.The battery-driven car of this structure has reduced the intermediate drive link, thereby the efficient of wheel hub motor is not lost because of transmission process.The high speed wheel hub motor be because band gear reduction and clutch mechanism can't realize that fluid oil is lubricated, thereby its life-span, efficient and noise all have unsafty place, and using more at present is the low speed wheel hub motor.Its defective is that no electricity is ridden because of there being the magnetic hysteresis resistance to require great effort, and coasting distance is short, and volume is big, Heavy Weight, and high pulling torque efficient is lower, and climbing function is poor slightly, although be used widely, also has many weak points.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned defective, a kind of new middle shaft drive Electrical Bicycle of design-calculated; Sub-hollow shaft motor is placed in the five-way pipe at Electrical Bicycle axis place, has that simple in structure, compact, in light weight, good heat dissipation, hill climbing ability are strong, manpower is ridden plurality of advantages such as better function.

Shaft drive Electrical Bicycle in the utility model design-calculated, mainly comprise: by standpipe, tiltedly the car body that constitutes of fine strain of millet, upright fork and chain stay, be installed in handle, brake lever, saddle, front and rear wheel, controller and battery case on the car body, be installed in the axis in the five-way pipe of car body and be installed in pedal on the axis; It is characterized in that comprise also being installed in the five-way pipe and being connected on internal rotor hollow shaft motor on the axis by bearing carrier ring that this motor-hollow axle outer end is equipped with a flywheel, this flywheel links to each other with rear wheel gear by chain.

Described internal rotor hollow shaft motor comprises hollow shaft, is placed in the outer rotor of hollow shaft by bearings, with key and the fastening stator and the electric motor end cap that is used to place bearing of five-way pipe.

Described internal rotor hollow shaft motor can be a speed motor in the DC brush, also can be speed motor in the brush DC.

Characteristics of the present utility model and effect:

1, in light weight: middle speed motor does not have body skin;

2, price is low: save raw MAT'L;

3, good heat dissipation: the heat of motor all looses to vehicle frame;

4, the manpower better function of riding: do not have magnetic hysteresis resistance and ordinary bicycle just the same;

5, hill climbing ability is strong: speed reduction gearing is arranged;

6, simple in structure, compact, adopt the bicycle common parts as far as possible, reduced special special purpose parts, increased reliability of products;

7, cheap: still unrivaled at present product;

8, be convenient to maintenance.

Description of drawings

Fig. 1 is general electric bicycle structure scheme drawing.

Fig. 2 is a middle shaft drive electric bicycle structure sketch of the present utility model.

Fig. 3 is an internal rotor hollow shaft motor structural representation of the present utility model.

Fig. 4 is an axis transmission decelerating device scheme drawing of the present utility model.

The specific embodiment

The shaft drive Electrical Bicycle reaches embodiment in conjunction with the accompanying drawings and is described in detail as follows in the utility model design-calculated:

Shaft drive Electrical Bicycle in the utility model design-calculated, as shown in Figure 2, mainly comprise: by standpipe 201, tiltedly the car body that constitutes of fine strain of millet 202, upright fork (not shown) and chain stay 204, be installed in saddle 22, handle, brake lever, front and rear wheel, controller and battery case (not shown) on the car body, be installed in the axis 24 in the five-way pipe 203 of car body and be installed in pedal (not shown) on the axis; Comprise also being installed in the five-way pipe and being connected on internal rotor hollow shaft motor 27 on the axis by bearing carrier ring that this motor-hollow axle outer end is equipped with a flywheel 28, this flywheel links to each other with rear wheel gear 30 by chain 29, shown in Fig. 3,4.

Internal rotor hollow shaft motor of the present utility model can be a speed motor in the DC brush, also can be speed motor in the brush DC.

A kind of internal rotor hollow shaft motor of the utility model design-calculated example structure comprises the stator 31 that is made of line bag (being to embed enamel wire on the silicon steel sheet) as shown in Figure 3, and this stator directly is connected with the five-way pipe and closed contact, with fastening, the anti-rotation of key.Do like this and have good radiating condition.

Have the steel casting of hollow shaft structure and post magnet steel 321 in these steel casting 320 outer rings and constitute rotors, hollow shaft both sides outer wall has bearing position (not shown), is used for and is installed in electric motor end cap on the five-way pipe cooperating and laying bearing, support rotor.Hollow shaft two ends inwall has the bearing position, is used for cooperating installation pedal unit (not shown) with axis 24.

Because internal rotor hollow shaft middling speed rotating speed of motor is very fast, moment of torsion is less, must could use through slowing down.

Present embodiment is installed a small flywheel 28 at motor-hollow axle outer end end, and it moves by the large toothed disk 30 that chain 29 drives trailing wheel, as shown in Figure 4, the small flywheel of present embodiment is 14 teeth, the large toothed disk that is installed on the trailing wheel is 70 teeth, has so just reached the deceleration purpose, has also increased moment of torsion.The large toothed disk and the disc brake dish that are installed on the trailing wheel are integrated, and disc brake 50 is installed on the chain stay of back, have both improved the reliability of brake, have improved product specification again.

Simultaneously can also change the flywheel that is installed on the motor-hollow axle into little chain wheel, trailing wheel changes the big flywheel of three-in-one or direct employing that flywheel, chain wheel and disc brake dish are installed into.

The present embodiment integral structure is: power transmission system is installed in the Electrical Bicycle left side, and promptly the chain speed reduction gearing is positioned at the left side, on the right side manpower driving system can be installed.The manpower chain wheel of riding is installed on the right side of axis, also is connected with the freewheel that is installed in the trailing wheel right side by chain, manpower scrunches and can drive the trailing wheel rotation.Because be to connect the disengagement of moving by bearing between axis and the motor, manpower scrunches and not influenced by motor, does not have the magnetic hysteresis resistance in other words.Motor rotates and does not also disturb manpower to scrunch.

In sum, in the present embodiment, two cover chain systems about existence: left side electric system and right side manpower system.

Also can be installed in car body one side to manpower electric power two cover systems simultaneously, as the right side.

Claims

1, a kind of middle shaft drive Electrical Bicycle, mainly comprise: by standpipe, tiltedly the car body that constitutes of fine strain of millet, upright fork and chain stay, be installed in handle, brake lever, saddle, front and rear wheel, controller and battery case on the car body, be installed in the axis in the five-way pipe of car body and be installed on the axis; It is characterized in that comprise also being installed in the five-way pipe and being connected on internal rotor hollow shaft motor on the axis by bearing carrier ring that this motor-hollow axle outer end is equipped with a flywheel, this flywheel links to each other with rear wheel gear by chain.

2, Electrical Bicycle according to claim 1 is characterized in that described internal rotor hollow shaft motor comprises hollow shaft, is placed in the outer rotor of hollow shaft by bearings, with the fastening stator of key and five-way pipe be used to place the electric motor end cap of bearing.

3, Electrical Bicycle according to claim 1 is characterized in that, described internal rotor hollow shaft motor adopts speed motor in the DC brush, or speed motor in the brush DC.