CN2414929Y

CN2414929Y - Wind assistor wheel for bicycle

Info

Publication number: CN2414929Y
Application number: CN 00209372
Authority: CN
Inventors: 陈声江; 徐润达; 戴淑嬿
Original assignee: Individual
Current assignee: Chen Shengjiang; Dai Shuyan; Xu Runda
Priority date: 2000-04-14
Filing date: 2000-04-14
Publication date: 2001-01-17
Anticipated expiration: 2010-04-14

Abstract

The utility model relates to a wind-force boosted bicycle wheel, relating to bicycles. The utility model is composed of a wheel rim, a wheel hub and a plurality of spokes, wherein, a tyre is arranged out of the wheel rim; the spokes which are rebound-type vanes of which cross sections form crescent shapes are fixedly connected between the wheel rim and the wheel hub, and are uniformly distributed in a radial shape; the convex surfaces of the spokes face to the direction in which a wheel rolls forward. The utility model has the advantages of simple structure, and convenient manufacture; the spokes which are the rebound-type vanes can generate secondary moment which can cause the wheel to roll forward for wind coming from each direction, and thus the utility model can cause a rider to save partial physical strength for riding; the utility model is particularly suitable for being served as a bicycle wheel, and can be widely served as the wheels of various man-power vehicles, such as a tricycle, etc.

Description

The wind-force power-assist is ridden wheel

The utility model relates to a kind of foot-operated wheel, and particularly relating to a kind of spoke is the foot-operated wheel of wind-force power-assist of bounce-back formula blade.

Bicycle has been subjected to generally liking of people as a kind of light walking-replacing tool, the vehicle of using always the most when China town and country people go on a journey especially.Refuse to take a passenger, in the world first bicycle 1801 by foreign serf's invention, through nearly 200 years updating, modern bicycle not only performance is more attained perfectly, moulding is also more attractive in appearance, but its basic structure and transmission principle there is no substantial change.The primary member of bicycle of the prior art is vehicle frame, wheel and chain drive, the bicyclist with both feet scrunch be power and by chain drive drive wheels roll forward.Ride the resistance of bicycle mainly from two aspects, be wheel and ground-surface friction drag and air resistance, especially when against the wind or crosswind wind speed when big, it is very outstanding that the resistance of air will become, and the bicyclist need pay several times muscle power and could slowly ride reluctantly.For this reason, many inventors or designer have designed that all to be intended to utilize wind-force or changing air resistance be power-assisted device or mechanism, wherein are no lack of the design plan of the structure of wheel being made some change.But, all these devices and mechanism, or because of its structure more complicated, or not really desirable because of its actual power-assist effect, the person that really do not put into practice is very few.

The purpose of this utility model promptly is to design the foot-operated wheel of a kind of wind-force power-assist, makes it can both produce for the wind comes from of all directions to make the additional moment that rolls before the wheel, thereby realizes that the changing air resistance is a power-assisted, and then make the bicyclist can save the part muscle power of riding.

To achieve these goals, the utility model is that cross-sectional plane is similar to meniscate bounce-back formula blade and makes convex surface roll direction before wheel according to the relevant principle of blade of gas turbine with the spoke design of riding wheel.For the spoke of design and installation like this, still be to roll moment before crosswind all will make the wheel generation additional against the wind, with the wind, thereby can make the bicyclist save the muscle power of partly riding.Be described in further detail below in conjunction with the technical characterictic of specific embodiment the foot-operated wheel of the utility model wind-force power-assist.

Accompanying drawing 1 is the structural representation of the foot-operated wheel of the utility model wind-force power-assist;

Accompanying drawing 2 is the wheel hub and the spoke schematic perspective view of the foot-operated wheel of the utility model wind-force power-assist;

Accompanying drawing 3 is the spoke cross-sectional plane most preferred embodiment figure of the foot-operated wheel of the utility model wind-force power-assist;

Accompanying drawing 4 is air flow figure in the bounce-back formula blade;

Air flow exploded drawings in first half blade and lower part blade when accompanying drawing 5 and accompanying drawing 6 are respectively crosswind.

With reference to figure 1 and Fig. 2, the foot-operated wheel of the utility model wind-force power-assist mainly is made of wheel rim 1, wheel hub 2 and most spokes 3, the wheel rim 1 outer tire 1 that is equipped with.Spoke 3 is the approximate meniscate bounce-back formula blade of cross-sectional plane.Being fixed between wheel rim 1 and the wheel hub 2 and rectangular distribution radially. its convex surface rolls direction before wheel.

The simplest crescent spoke cross-sectional plane is that concave surface and convex surface are circular arc.And the curvature of convex globoidal is greater than the recessed lonely curvature of face.The arc length of convex globoidal is greater than the cancave cambered surface arc length.

With reference to figure 3, the concave surface 5 of best spoke cross-sectional plane is a circular arc, convex surface then is made up of convex globoidal 6 and the left arc tangent plane 7 and the right arc tangent plane 1 that are cut in two ends, convex globoidal 6 left and right sides respectively, and the curvature of convex globoidal 6 is greater than the curvature of cancave cambered surface 5, and the arc length of convex globoidal 6 is then less than cancave cambered surface 5 arc length.

With reference to figure 4, when windstream enters blade with 1 jiao of β and flows out blade with 2 jiaos of β bounce-back, promptly on blade, produce an impulsive force, and the impulsive force that acts on the wheel first half blade is just in time opposite with impulsive force direction on acting on wheel lower part blade, can produce like this and make the additional moment that rolls before the wheel.

With reference to figure 5 and Fig. 6, for crosswind

Always can be decomposed into

Obviously, to the impulsive force direction of wheel first half blade just in time with opposite to the impulsive force of wheel lower part blade.Therefore, all can produce from the crosswind of which direction and make the additional moment that rolls before the wheel.

When wind direction is against the wind the time, because stressed greater than wheel first half blade of wheel lower part blade stressed makes the additional moment that rolls before the wheel so can produce.Equally, when wind direction for the wind the time, what wheel first half blade stressed will be greater than wheel lower part blade is stressed, makes the additional moment that rolls before the wheel so still can produce.

No matter this shows, be with the wind, contrary wind or crosswind, and bounce-back formula blade all can produce and make the additional moment that rolls before the wheel.

In sum as can be known, the utility model is simple in structure, ingenious, convenient processing and manufacture, and bounce-back formula blade spoke all can produce for the wind comes from of all directions and make the additional moment that rolls before the wheel, thereby can make the bicyclist save the muscle power of partly riding.Therefore, the utility model is particularly suitable for as bicycle, various manpower wheels such as three-wheel vehicle.

Claims

1, the foot-operated wheel of a kind of wind-force power-assist is made of wheel rim, wheel hub and a plurality of spoke, and wheel rim is equipped with tire outward, and spoke is fixed between wheel rim and the wheel hub and rectangular distribution radially; Of the present utility modelly be characterised in that described spoke is the approximate meniscate bounce-back formula blade of cross-sectional plane, its convex surface rolls direction before wheel.

2, the foot-operated wheel of wind-force power-assist according to claim 1 is characterized in that described spoke concave surface and convex surface are circular arc, and convex globoidal curvature is greater than cancave cambered surface curvature, and the convex globoidal arc length is greater than the cancave cambered surface arc length.

3, the foot-operated wheel of wind-force power-assist according to claim 1, it is characterized in that described spoke concave surface is a circular arc, convex surface then by convex globoidal and the left arc tangent plane and the right arc tangent plane that are cut in two ends, the convex globoidal left and right sides respectively form, convex globoidal curvature is greater than cancave cambered surface curvature, and the convex globoidal arc length is then less than the cancave cambered surface arc length.