CN2285240Y - Transmission device for driving-aid bicycle - Google Patents

Abstract

The utility model relates to a transmission device for a driving-aid bicycle, comprising a middle shaft (1), a chain wheel (2), a middle shaft flywheel (3) and a driven wheel (4) with aiding engagement; the middle shaft flywheel (3) and a flywheel of a back wheel are sheathed with one end of a middle shaft (1) in a derotation direction; the middle shaft (1) is fixedly arranged in an inner shaft sleeve of the middle shaft flywheel (3); a chain wheel (2) and the driven wheel (4) with aiding engagement which are mutually parallel are fixedly arranged on an outer rotating wheel of the middle shaft flywheel (3); the chain wheel (2), the driven wheel (4) with aiding engagement and the middle shaft flywheel (3) are coaxial. The driven wheel (4) with aiding engagement is connected with an aiding source. The utility model makes the manpower and aiding power share a set of driving device. The utility model has the advantages of simple structure and convenient installation, maintenance and operation. The utility model can be combined with a speed change device, realizing the aiding speed change transmission; therefore, the finished unification of the aiding and the speed change can be achieved.

Description

The aiding bicycle driving device

The utility model belongs to transmission mechanism of bicycle, and what be specifically related to is a kind of aiding bicycle driving device.

Existing aiding bicycle adopts two kinds of type of drive: a kind of is to adopt two to overlap independently sprocket wheel-flywheel group, and the power-assisted of transmitting manpower and power-assisted source such as electrical motor or driving engine respectively drives trailing wheel and rotates; Another kind is to finish power-assisted with power-assisted source direct drive front-wheel or trailing wheel.This dual mode has the following disadvantages: 1. manpower and power-assisted can not shared same set of transmission device, especially first kind of modes, cause the waste of material and make the vehicle body heaviness; 2. for variable speed bicycle, the power-assisted of this dual mode all can't the direct drive variable transmission mechanism, can not make full use of the efficient in power-assisted source.

The purpose of this utility model is to solve the weak point of the above existing morpet, provide a kind of manpower and power-assisted of making to comprise that variable transmission mechanism drives trailing wheel by a shared sets of transmission mechanism, and the driving device that manpower and power-assisted can be independent separately or combination drives.

The purpose of this utility model is achieved in that the utility model comprises axis, sprocket wheel, axis flywheel and power-assisted interlock flower wheel, axis flywheel and back flying wheel derotation direction, be set in an end of axis, the internal axle sleeve internal fixation of axis flywheel connects axis, sprocket wheel that captive joint is parallel to each other on the outer spinning roller of axis flywheel and power-assisted interlock flower wheel, sprocket wheel, power-assisted interlock flower wheel and axis flywheel are coaxial, the outer spinning roller of its middle sprocket, power-assisted interlock flower wheel and axis flywheel is fixed into one, and they can be synchronously and coaxial rotation; Power-assisted interlock flower wheel links to each other with the power-assisted source.

When driving by manpower is foot-operated separately, the internal axle sleeve of axis and the axis flywheel that is fixed thereon rotates synchronously, drive the outer spinning roller of axis flywheel and with it the sprocket wheel of one rotate synchronously, rotate thereby drive bicycle rear; When independent power-assisted by the power-assisted source drives, power-assisted such as driving engine or electrical motor source is by takeoff output driving wheel or other mechanism and the interlock of power-assisted interlock flower wheel, drive power-assisted interlock flower wheel and reach the outer spinning roller and the sprocket rotation of the axis flywheel of one with it, rotate thereby drive bicycle rear, and the internal axle sleeve of axis and axis flywheel can motionless or counter-rotation; When going up a slope or pavement state when bad, manpower can be worked simultaneously with power-assisted, orders about trailing wheel jointly and rotates.

The utility model has only been done in the position of axis a bit to improve, promptly mainly be between axis and sprocket wheel, to have increased a hand of rotation opposite axis flywheel with the back flying wheel, can make the shared sets of transmission mechanism of manpower and power-assisted that power is reached trailing wheel, event has simple in structure, installs and uses and advantage easy to maintenance; In addition, the utility model except that with also can combine the single speed transmission device combines with speed-changing mechanism, realize the transmission of power-assisted speed change, reach the perfect unity of power-assisted and speed change.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the structural representation of the utility model embodiment.

As shown in Figure 1, the utility model embodiment comprises axis 1, sprocket wheel 2, axis flywheel 3 and power-assisted interlock flower wheel 4.Axis 1 is fixed on the cycle frame by bearing 5, and two of axis 1 links to each other with pedal cranks; Axis flywheel 3 and back flying wheel derotation direction, be set in an end of axis 1, the internal axle sleeve internal fixation of axis flywheel 3 connects axis 1, sprocket wheel 2 that captive joint is parallel to each other on the outer spinning roller of axis flywheel 3 and power-assisted interlock flower wheel 4 also are fixedly connected with horizontal structure 6 between sprocket wheel 2 and the power-assisted interlock flower wheel 4.Sprocket wheel 2, power-assisted interlock flower wheel 4 and axis flywheel 3 are coaxial, and the outer spinning roller of its middle sprocket 2, power-assisted interlock flower wheel 4 and axis flywheel 3 is fixed into one, and they can be synchronously and coaxial rotation; The takeoff output driving wheel interlock of power-assisted interlock flower wheel 4 and driving engine or electrical motor.

The utility model embodiment and chain, trailing wheel flywheel together, with regard to basic comprising the transmission device of power-assisted single speed bicycle; The utility model embodiment and chain, back flying wheel group and group chain device iso-variable velocity control mechanism are combined, and have just constituted the transmission device of power-assisted variable speed bicycle, and manpower and power-assisted can drive same set of variable transmission mechanism alone or in combination; Sprocket wheel of the present utility model can be a plurality of that or diameter do not wait, the multi-disc sprocket wheel then is parallel to each other and is fixed on the outer spinning roller of axis flywheel (3), add that axis dials chain device iso-variable velocity control mechanism and just can constitute the axis speed-changing mechanism, with the combination of rear change mechanism, can realize that many multiples of the speed of a motor vehicle are regulated.

The working process of the utility model embodiment is as follows: when driving by manpower is foot-operated separately, the internal axle sleeve of axis 1 and the axis flywheel 3 that is fixed thereon rotates synchronously, drive the outer spinning roller of axis flywheel 3 and with it the sprocket wheel 2 of one rotates synchronously, thereby drive the bicycle rear rotation; When driving by driving engine or electrical motor separately, driving engine or electrical motor are by takeoff output driving wheel and 4 interlocks of power-assisted interlock flower wheel, drive power-assisted interlock flower wheel 4 and the outer spinning roller and sprocket wheel 2 rotations of the axis flywheel 3 of one with it, rotate thereby drive bicycle rear, and this moment axis 1 and the internal axle sleeve of axis flywheel 3 can motionless or counter-rotation; When going up a slope or pavement state when bad, manpower can be worked simultaneously with power-assisted, orders about bicycle rear jointly and rotates.

Claims (3)

1. aiding bicycle driving device, comprise axis (1) and sprocket wheel (2), it is characterized in that: also comprise axis flywheel (3) and power-assisted interlock flower wheel (4), axis flywheel (3) and back flying wheel derotation direction, be set in an end of axis (1), the internal axle sleeve internal fixation of axis flywheel (3) connects axis (1), sprocket wheel (2) that captive joint is parallel to each other on the outer spinning roller of axis flywheel (3) and power-assisted interlock flower wheel (4), sprocket wheel (2), power-assisted interlock flower wheel (4) and axis flywheel (3) are coaxial; Power-assisted interlock flower wheel (4) links to each other with the power-assisted source.

2. aiding bicycle driving device according to claim 1 is characterized in that: also be fixedly connected with horizontal structure (6) between described sprocket wheel (2) and the power-assisted interlock flower wheel (4).

3. aiding bicycle driving device according to claim 1 and 2 is characterized in that: described sprocket wheel (2) is the multi-disc that a slice or diameter do not wait, and the multi-disc sprocket wheel is parallel to each other and is fixed on the outer spinning roller of axis flywheel (3).

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