CN1468747A

CN1468747A - Improved drive structure for electric bicycle

Info

Publication number: CN1468747A
Application number: CNA02136074XA
Authority: CN
Inventors: 黄鹏宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-17
Filing date: 2002-07-17
Publication date: 2004-01-21

Abstract

The improved drive structure for electric bicycle includes one drive motor set beside the front fork, one built-in gear box and perpendicularly extending drive force outputting shaft. The drive force outputting shaft drives the hub of the front wheel via gears, and through altering the driving gear ratio, drive force in different speed and torque may be output to drive the front wheel for complete driving or auxiliary driving. Distributing the weight of the drive motor and the relevant mechanism in the front wheel can reduce effectively the load of the back wheel and improve the operation performance of the bicycle.

Description

The driving of Electrical Bicycle improves structure

Technical field

The present invention is that a kind of driving of Electrical Bicycle improves structure.

Technical background

Raising gradually along with people's environmental consciousness in the world wide, clean, oligosaprobic electric vehicle constantly is modified and merchandizing, wherein Electrical Bicycle is because simple in structure and cost of development is lower, and becomes the comparatively successful a kind of electric vehicle of present merchandizing.

In the present common electric bicycle structure, announcing No. 470036 (applying for No. 89215613) patent as the TaiWan, China patent gazette discloses, mainly be that CD-ROM drive motor is located at trailing wheel, the power control of controlling this motor then is the Chain stay place that is located at vehicle frame, utilize the action of power control induction stretcher, cooperation one is arranged at the drag-line of handle, thereby the CD-ROM drive motor action is used auxiliary rider and reached the labour-saving effect.

And for example announce No. 467091 (applying for No. 89202930), the bulletin No. 404383 (applying for No. 87210169) these two patents described, all be that axletree in trailing wheel is provided with in order to constitute the plate-like casing of wheel hub, be provided with an electrical motor in this plate-like casing, combine with a manpower drive division to cooperate a flywheel mechanism, and can be respectively or drive trailing wheel rotation simultaneously and bicycle is advanced.

It is disclosed to announce No. 371937 (applying for No. 87215676) patent for another example, mainly be to be provided with a change-speed box and total power switch in the handlebar place, pipe support is provided with brake retrace mechanism before vehicle body hanger, then be provided with battery pack between the upper and lower transverse tube on the car body, seat cushion below rear side then is provided with the gear motor of an electromagnetic servo, then articulate a multiple-piece single direction ratchet on this gear motor main driving axle and be connected chain, use through chain and drive the bicycle rear rotation.

More than in each existing structure, all be that main propulsion source is arranged at central frame beam or rear, drive the trailing wheel of bicycle again in direct or indirect mode through a driving device; Yet, because mostly the Regular Bicycle structure is to be advanced by the mode of back-wheel drive at present, therefore originally existing chain, gear (and brake, transmission component) wait element and the space that seems crowds near the wheel shaft of trailing wheel, if add each required item of each Electrical Bicycle (motor and associated mechanisms, control element) again, then certainly will make former narrow space more apparent narrow, and it is complicated more on the structure, except the degree of difficulty and productive costs that increase whole development, also very inconvenient during maintenance like this; And therefore the most of weight that increases all puts on trailing wheel, causes the increase of bicycle rear load, accelerated wear test, and easier generation skidding influences its handling.

Summary of the invention

The driving that the present invention aims to provide a kind of Electrical Bicycle improves structure, and CD-ROM drive motor and associated mechanisms distribution of weight in front vehicle wheel, can effectively be reduced the load of trailing wheel, and strengthen the handling of bicycle.Further, the driving that the present invention aims to provide a kind of Electrical Bicycle improves mechanism, the speed-variating hub mechanism of the built-in transmission system of its front-wheel hub utilizes the tooth ratio of this speed-variating hub mechanism its power conversion of appropriate change, and exportable friction speed, torsion are to correspond to actual needs.

For solving the problems of the technologies described above, the driving that the invention provides a kind of Electrical Bicycle improves structure, comprise: CD-ROM drive motor, driving device, wheel hub, wherein: described CD-ROM drive motor is incorporated into the front fork tube side of bicycle, and in a suitably interior slippage up and down of distance, its mouth makes with a driving gear set that the central axis of its power take-off shaft and CD-ROM drive motor is vertical to stretch out, and the end of power take-off shaft is provided with a driven wheel; Described wheel hub is arranged at the wheel shaft outer peripheral edges of front vehicle wheel and is synchronous interlock with front vehicle wheel; Described driving device be located at aforementioned wheel hub one distolateral and with the synchronous interlock of wheel (wheel hub), be provided with in the described driving device and the corresponding double wedge of the driven wheel of aforementioned takeoff output shaft end; By CD-ROM drive motor slippage up and down, driven wheel on its power take-off shaft is changed and the combining of driving device, and can be via power take-off shaft via the actuator drives wheel hub and the front vehicle wheel that are connected mutually, to reach the effect that cooperates service vehicle to advance or drive fully.

Preferably, described driving device is an Internal gear.

Preferably, described driving device is a gear.

Preferably, described wheel hub also connects one and supplies the rider to change the speed of a motor vehicle of bicycle and the speed-changing mechanism of torsion according to need, and described speed-changing mechanism changes speed-variating hub in-to-in gear ratio by drag-line control.

Unlike the prior art be, the present invention mainly is that side is installed with a CD-ROM drive motor outside the front fork pipe support of bicycle, this CD-ROM drive motor also can make power take-off shaft be vertical extent through a built-in gear case, this power take-off shaft then directly is connected with the wheel shaft of front-wheel mutually via gear, utilizing this CD-ROM drive motor to drive front-wheel rotates, to reach the effect that drives or cooperate service vehicle to advance fully, its by with the distribution of weight of CD-ROM drive motor and associated mechanisms in front vehicle wheel, can effectively reduce the load of trailing wheel, and promote the handling of bicycle.

Description of drawings

As for detailed construction of the present invention, effect and effect, then the explanation that can do with reference to following adjoint can be further understood, wherein:

Fig. 1 is the composite construction scheme drawing of the first embodiment of the present invention;

Fig. 2 is the structure decomposing schematic representation of the first embodiment of the present invention;

Fig. 3 is the action diagram of the first embodiment of the present invention when power is not connected;

Fig. 4 is the action diagram of the first embodiment of the present invention when power is connected;

Fig. 5 is the composite construction scheme drawing of the second embodiment of the present invention;

Fig. 6 is the structure decomposing schematic representation of the second embodiment of the present invention;

Fig. 7 is the action diagram of the second embodiment of the present invention when power is not connected;

Fig. 8 is the action diagram of the second embodiment of the present invention when power is connected.

The specific embodiment

Fig. 1, Fig. 2 is the combination of first embodiment of the invention, decompose constructional drawing, as shown in the figure, the present invention mainly comprises: CD-ROM drive motor 1, speed-variating hub 2 and transmission device 3, wherein CD-ROM drive motor 1 can make the central axis vertical extent of its power take-off shaft 13 and CD-ROM drive motor 1 with a driving gear set 11, and these power take-off shaft 13 outer end peripheries are provided with gear 131, and CD-ROM drive motor 1 top is the front fork tube 5 that is fixed in bicycle with a fixed support 123, then extend downwards with the extension board 12 of a tool slotted hole 121 bottom of CD-ROM drive motor 1, and speed-variating hub 2 is wheel shaft 41 outer peripheral edges that are arranged at front vehicle wheel 4; Be provided with speed-changing mechanism in the speed-variating hub 2, can be subjected to drag-line control and conversion wheel hub 2 in-to-in gear ratios; Transmission device 3 comprises: inner pedestal 31, side shaft holder 32 and internal tooth wheel disc 33, inner pedestal 31, side shaft holder 32 are all sides that are sleeved on wheel shaft 41 respectively, can make inner pedestal 31, side shaft holder 32 form the combination that can pivot mutually by the bearing in it, this side shaft holder 32 stretches in the axis hole 51 of front fork tube 5 ends in addition again, make it fixing by two locknut 321 clampings, inner pedestal 31 then combines with internal tooth wheel disc 33 to form an interlock, and internal tooth wheel disc 33 peripheries inwardly form a plurality of inner circular tooths 331.

During combination, the wheel shaft 41 of front vehicle wheel 4 can wear the slotted hole 121 that runs through extension board 12 behind the sleeve pipe 122, and be screwed together in the default outside thread 411 in wheel shaft 41 ends with a location nut 42, and wheel shaft 41 ends are located, be connected the power take-off shaft 13 of CD-ROM drive motor 1 outputting power simultaneously and stretch in the internal tooth wheel disc 33 and staggered with inner circular tooth 331 with gear 131, and this internal tooth wheel disc 33 and combine and interlock with speed-variating hub 2 via side shaft holder 32.

Fig. 3, Fig. 4 are the action diagram of first embodiment of the invention before and after power is connected, as shown in the figure, during use, when general rider's muscle power is sufficient or during other situation (as: when descending, high speed), CD-ROM drive motor 1 can suitably descend (wheel shaft 41 in slotted hole 121 upwards promote), this moment power take-off shaft 13 gear 131 not with inner circular tooth 331 engagement of internal tooth wheel disc 33, the power of CD-ROM drive motor 1 does not transfer to the internal tooth wheel disc 33 with speed-variating hub 2 interlocks, and front vehicle wheel 4 is subjected to other external force effect with state of nature and moves; And if the bicycle rider just like: the climbing, quicken to wait when needing, can open the power supply of CD-ROM drive motor 1, and CD-ROM drive motor 1 rising (this moment, wheel shaft 41 descended in slotted hole 121) and the gear 131 of power take-off shaft 13 are meshed with the inner circular tooth 331 of internal tooth wheel disc 33, the power of CD-ROM drive motor 1 output can directly transfer to internal tooth wheel disc 33, drive front vehicle wheel 4 rotates to order about internal tooth wheel disc 33 (speed-variating hub 2), at this moment, the rider can be again according to the speed of a motor vehicle of bicycle, required torsion conditions such as (during climbings), and can change gear ratio in this speed-variating hub 2 by speed-changing mechanism, so that front vehicle wheel 4 cooperated the foot-operated speed of rider and produce a suitable rotating speed relatively, use to reach and cooperate service vehicle to advance or the effect of driving fully.

Fig. 5, Fig. 6 are combination, the decomposition constructional drawings of second embodiment of the invention, cooperate power such as Fig. 7, Fig. 8 to be connected the action diagram of front and back by it, can be clear that, inner pedestal 31 is directly to combine with a helical wheel 34 in the present embodiment, then be provided with a helical wheel 132 relatively in power take-off shaft 13 ends, an element such as all the other each CD-ROM drive motor 1, speed-variating hub 2 and transmission device 3 all has similar unitized construction; During use, if need the power-assisted of CD-ROM drive motor 1, then can open the power supply of CD-ROM drive motor 1, and CD-ROM drive motor 1 decline (this moment, wheel shaft 41 upwards promoted in slotted hole 121) and the helical wheel 132 of power take-off shaft 13 are meshed with helical wheel 34, the power of CD-ROM drive motor 1 output can directly transfer to helical wheel 34, drives front vehicle wheel 4 to order about helical wheel 34 (speed-variating hub 2) and rotates; If when need not the power-assisted of CD-ROM drive motor 1, then can close the power supply of CD-ROM drive motor 1, and make CD-ROM drive motor 1 rise (this moment, wheel shaft 41 descended) in slotted hole 121, the helical wheel 132 of power take-off shaft 13 does not mesh with helical wheel 34, the power of CD-ROM drive motor 1 can't transfer to the helical wheel 34 with speed-variating hub 2 interlocks, and front vehicle wheel 4 is subjected to other external force effect with state of nature and moves.

The present invention by with the distribution of weight of above-mentioned CD-ROM drive motor 1 and associated mechanisms in front vehicle wheel 4, remove the structure at the wheel shaft position that can effectively simplify rear wheel, it is easy to outside assembling, the maintenance, also can make two of bicycle take turns the distribution of weight equilibrium, can effectively reduce the over load of rear wheel, and then improve the handling of bicycle.

From the above, Electrical Bicycle of the present invention and driving improve structure and have really and simplify the effect that drive configuration, cost-cutting, distribution of weight are average, improve vehicle performance.

Above-described is preferred embodiment of the present invention only, is not to be used for limiting scope of the invention process.All equivalent variations and modifications of being made according to the present invention's design are all claims scope of the present invention and contain.

Claims

1. the driving of an Electrical Bicycle improves structure, comprise: CD-ROM drive motor, driving device, wheel hub, it is characterized in that: described CD-ROM drive motor is incorporated into the front fork tube side of bicycle, and in a suitably interior slippage up and down of distance, its mouth makes with a driving gear set that the central axis of its power take-off shaft and CD-ROM drive motor is vertical to stretch out, and the end of power take-off shaft is provided with a driven wheel; Described wheel hub is arranged at the wheel shaft outer peripheral edges of front vehicle wheel and is synchronous interlock with front vehicle wheel; Described driving device be located at aforementioned wheel hub one distolateral and with the synchronous interlock of wheel (wheel hub), be provided with in the described driving device and the corresponding double wedge of the driven wheel of aforementioned takeoff output shaft end; By CD-ROM drive motor slippage up and down, driven wheel on its power take-off shaft is changed and the combining of driving device, and can be via power take-off shaft via the actuator drives wheel hub and the front vehicle wheel that are connected mutually, to reach the effect that cooperates service vehicle to advance or drive fully.

2. Electrical Bicycle as claimed in claim 1 drives and improves structure, and it is characterized in that: described driving device is an Internal gear.

3. Electrical Bicycle as claimed in claim 1 drives and improves structure, and it is characterized in that: described driving device is a gear.

4. drive the improvement structure as claim 2 or 3 described Electrical Bicycles, it is characterized in that: described wheel hub also connects one and supplies the rider to change the speed of a motor vehicle of bicycle and the speed-changing mechanism of torsion according to need, and described speed-changing mechanism changes speed-variating hub in-to-in gear ratio by drag-line control.