CN101249870B - Lying type bicycle - Google Patents

Abstract

The invention relates to the actuating technique of bicycles, in particular to a recumbent bicycle employing a method of rack actuation. The recumbent bike comprises a front wheel, a rear wheel, a frame for connecting the front wheel to the rear wheel, a faucet handle on the rear wheel, a recumbent saddle arranged on the frame and an actuating device for the front wheel, which is characterized in that the front wheel actuating device employing a rack actuating mechanism can move linearly, wherein the rack actuating mechanism comprises a ratchet connected with a wheel shaft of the front wheel, a toothed rack bar engaged with the ratchet gear and a pedal connected with the toothed rack bar, the front wheel can rotate when the toothed rack bar moves forwards, then the front wheel rolls forwards while the toothed rack bar moves backwards, and the ratchet has little influence on the front wheel, thereby the front wheel can rotate normally. The recumbent bicycle has the advantages of energy saving in riding, fast forward speed and the like.

Description

A kind of recumbent bicycle

Technical field

The present invention relates to bicycle driving technology, particularly a kind of recumbent bicycle that adopts the rack drives method.

Background technology

Traditional recumbent bicycle places the forefront with pedal sprocket, the cyclist couches on vehicle body, pin is pedal forward, steps on version and makes sprocket rotation as circular movement, and the moment of sprocket rotation removes to drive cyclist's bicycle rear after one's death through a long chain or through after other sprocket wheel transfers.The bicycle front-wheel is positioned at cyclist's shank below, the handle on the hand-held front-wheel vertical shaft of cyclist, control bicycle working direction.

When the recumbent bicycle pedal was made circular movement, pedal was subjected to the forward action power F from people's leg, and F is broken down into the tangential force F along the tangent to periphery direction ₁With the axial force F of pointing to the axle center along the radius of a circle direction ₂Tangential force F ₁Formed and driven the moment that bicycle advances, axial force F ₂Because of can't forming moment, direction sensing axle center has been wasted.Fig. 1 is a pedal force analysis scheme drawing, and A is a pedal among the figure, and B is a crank, and C is a sprocket wheel, when pedal is made circular movement between radius and the horizon angle be the θ angle.

Analyze the efficiency of recumbent bicycle pedal sprocket drive system now.When θ does work tangential force F from 0 to π interval people's leg strength F ₁The driving bicycle advances, and is that backhaul people leg strength F does not do work to 2 π intervals from π.Rely on the acting of alternately having an effect of people left and right sides leg, its tangential force F at 0 to π interval bicycle ₁Driving the recumbent bicycle wheel advances.

When F is being asked at the θ angle when 0 changes to π ₁Aviation value

As can be seen from Figure 1:

F ₁＝FSnθ

${\stackrel{\‾}{F}}_1=\frac{F}{b-a}\underset{a}{\overset{b}{\∫}}\mathrm{Sin\θd\θ}=\frac{F}{\mathrm{\π}-0}\underset{0}{\overset{\mathrm{\π}}{\∫}}\mathrm{Sin\θd\θ}$

${\stackrel{\‾}{F}}_1=\frac{F}{\mathrm{\π}}(-\mathrm{COS}{\mathrm{\θ}|}_0^{\mathrm{\π}})=\frac{F}{\mathrm{\π}}[-(-1-1)]$

${\stackrel{\‾}{F}}_1=\frac{2}{\mathrm{\π}}F\≅0.637F$

As can be known the pedal sprocket drive system of traditional recumbent bicycle, on average have only 63.7% can form drive moment that wheeled devices advance from the directed force F of people's leg from following formula, 36.3% has been wasted.

Tradition recumbent bicycle pedal sprocket and track rear are from far must driving trailing wheel through quite long chain or through other sprocket wheel transfers, and loss increases more requires great effort the cyclist.

Summary of the invention

The recumbent bicycle that the purpose of this invention is to provide the straight-line rack drives of a kind of usefulness mainly solves existing defective in the above-mentioned prior art, have ride laborsaving, advantage such as speed of advance is fast.

For achieving the above object, the present invention is achieved in that

A kind of recumbent bicycle, it comprises the formula of lying vehicle seat and the front-wheel drive that is provided with on the vehicle frame, trailing wheel tap handle, vehicle frame of front-wheel, trailing wheel, connection front and rear wheel, it is characterized in that: it is straight-line rack drives mechanism that this f-w-d adopts, it comprises with front-wheel wheel shaft bonded assembly ratchet and (promptly is commonly called as the attachments of a bicycle of " flying ", owing to be well-known attachments of a bicycle, its principle or inner structure are described no longer here), with the tooth bar of ratchet tooth mesh and with tooth bar bonded assembly pedal; This tooth bar ratchet that travels forward just drives front-wheel and rotates, and front-wheel is rolled advance, and tooth bar moves backward, and ratchet does not influence the normal rotation of front-wheel.

Described recumbent bicycle is characterized in that: this tooth bar is for being horizontally disposed with.

Described recumbent bicycle is characterized in that: this tooth bar is engaged on the ratchet upside.

Described recumbent bicycle is characterized in that: each fixes a cover front-wheel drive inboard of the left and right arm of front-fork that this car is driven; Every cover front-wheel drive comprises a metal tube, metal tube and ratchet intersection have openning and make inner tooth bar of metal tube and ratchet engaged, this metal tube leading portion outside has rectangular mouthful, the connecting portion of pedal and tooth bar can be moved in rectangular mouthful, also be provided with a Bringing-back mechanism between tooth bar and the metal tube.

By the foregoing invention method and structure: in the recumbent bicycle with straight-line rack drives, people's leg strength can 100% forms and drives the moment that bicycle advances, and mechanical efficiency is higher than the recumbent bicycle that traditional pedal sprocket drives.Therefore, it is laborsaving to ride with the recumbent bicycle of straight-line rack drives, and speed of advance is fast, and recreational strong, body-building effect is also better.

Description of drawings

Fig. 1 is existing recumbent bicycle pedal force analysis figure.1 is pedal among the figure, the 2nd, and crank, the 3rd, sprocket wheel.F is people's a leg strength, F ₁Be the tangential component of F, F ₂It is the normal component of F.θ is an angle between radius and the horizon.

Fig. 2 is the principle schematic of the straight-line rack drives recumbent bicycle of the present invention front-wheel.12 is tooth bars among the figure, the 1st, and pedal, the 5th, ratchet, the 6th, front-wheel.People's pin is Pedalling 1 forward, drives tooth bar 12 and travels forward, and ratchet 5 drives front-wheel 6 and rotates, and recumbent bicycle travels forward.

Fig. 3 is the scheme drawing of recumbent bicycle of the present invention.6 is front-wheels among the figure, the 1st, and pedal, the 7th, metal tube, the 8th, trailing wheel tap handgrip, the 9th, the formula of lying vehicle seat, the 10th, vehicle frame, the 11st, trailing wheel.

Fig. 4 is the scheme drawing of rack drives device of the present invention and ratchet 5.1 is pedal among the figure, the 5th, and ratchet, the 12nd, tooth bar, the 13rd, spring, the 7th, metal tube.

Fig. 5 is the A-A section-drawing of Fig. 4.7 is metal tubes among the figure, the 12nd, and tooth bar, the 14th, the tooth of tooth bar.

The specific embodiment

Please see Figure 2, Fig. 2 has represented the driving principle of straight-line rack drives recumbent bicycle front-wheel, and 1 is pedal among the figure, the 12nd, and tooth bar, the 5th, ratchet, the 6th, front-wheel.Wherein the ratchet fixed with traditional bicycle rear shaft of the structure of ratchet 5 is the same, ratchet 5 also is consistent with the rotation direction of standard bicycle ratchet regulation: promptly when tooth bar 12 is engaged on ratchet 5 upsides, tooth bar 12 ratchet 5 that travels forward just drives front-wheel 6 and rotates, front-wheel 6 is rolled advance, tooth bar 12 (backhaul) ratchet 5 that moves does not backward influence the normal rotation of front-wheel 6.

In the represented rack drives recumbent bicycle of Fig. 2, tooth bar 12 installation directions are parallel to ground, and (perhaps with angle of terrain slope) tooth bar 12 1 ends are fixed with pedal 1, and tooth bar 12 is engaged in ratchet 5 upsides.People's leg strength acts on the pedal 1 by pin, and pedal 1 is travelled forward, and people's leg strength forms the moment that the driving front-wheel advances by the tangential direction 100% that tooth bar 12 acts on ratchet 5.

Please see Figure 3, Fig. 3 is the recumbent bicycle scheme drawing that adopts rack drives.The 6th, front-wheel, the 1st, pedal, the 7th, metal tube, the 8th, trailing wheel tap handgrip, the 9th, the formula of lying vehicle seat, the 10th, vehicle frame, the 11st, trailing wheel.Each fixes a cover rack drives device to the rack drives recumbent bicycle in the inboard of front-fork left and right arms, and Fig. 4 is the rack drives apparatus structure scheme drawing that is positioned at front-fork left arm inboard.1 is pedal among the figure, the 5th, and ratchet, the 12nd, tooth bar, the 13rd, spring, 7 metal tubes.Metal tube 7 has the arc openning with ratchet 5 intersections, allows metal tube 7 inner tooth bars 12 mesh with ratchet 5, and the outside in the left side of metal tube 7 has rectangular mouthful, and pedal 1 can be travelled forward.Spring 13 right-hand members are fixed on metal tube 12 right-hand members, and the right-hand member of spring 13 left ends and tooth bar 12 connects together, and tooth bar 12 left ends are fixed with pedal 1, and tooth bar 12 can be neatly in metal tube 7 inner side-to-side movements.Fig. 5 is the A-A section-drawing of metal tube 7 tooth bars 12, and 7 is metal tube 7 sections among the figure, the 12nd, and the section of tooth bar 12, the 14th, the tooth of tooth bar 12.

Because tooth bar 12 and spring 13 are contained in the metal tube 7 of rack drives device, and ratchet 5 is blocked by rear wheel fork, they all can not show in Fig. 3.So when seeing the represented rack drives recumbent bicycle of Fig. 3, must see together in conjunction with Fig. 4 simultaneously.People's leg is with pin forward during pedal 1, and the tooth bar 12 in the rack drives device metal pipe 7 drives ratchets 5 and drives front-wheels 6 and rotate recumbent bicycle is advanced.When the moving pin of people's bottom bands of trouser legs moved backward, spring 13 drove tooth bar 12 and moves backward, made pedal 1 paste pin and got back to starting point, and the pulling force of spring 13 is less in the friction force back pull of offsetting tooth bar 12.In the rack drives recumbent bicycle, the direction level of leg strength is forward all the time along the tangential direction of ratchet 5 when tooth bar 12 is parallel to people from ground, when tooth bar 12 favours ground, also can 100% form along the tangential direction of ratchet 5 all the time before people's leg strength direction is tilted to and drive the moment that bicycle advances, the drive efficiency of rack drives recumbent bicycle has improved 36.3% than traditional recumbent bicycle.

In the rack drives recumbent bicycle, spring 13 is not to be indispensable.For example the cyclist uses the special purpose shoes that can be buckled together with pedal, and special purpose shoes is taken back the original place with pedal 1 and tooth bar 12 when the pin backhaul, just can cancel spring 13.Also tooth bar 12 upper ends can be connected with steel wire or the chain of frame on pulley with right side tooth bar upper end, when tooth bar 12 moved downward, steel wire or chain just drove right side tooth bar upward movement; When the right side tooth bar moved downward, steel wire or chain just drove tooth bar 12 upward movements.

Under the situation that the bicycle cruising promptly travels with moderate velocity, with same power, the rack drives recumbent bicycle can obtain than traditional recumbent bicycle faster speed; Perhaps under the situation of advancing at the same rate, the rack drives recumbent bicycle is more laborsaving than traditional recumbent bicycle.The rack drives recumbent bicycle also has two characteristics that traditional recumbent bicycle does not have: first tradition recumbent bicycle can only alternately be had an effect by left and right sides leg, and the rack drives recumbent bicycle where necessary can about two legs have an effect forward simultaneously, obtain express speed of advance.It two is when low velocity is advanced, it is the circular movement of 2 π R (R is that pedal to sprocket wheel distance of shaft centers is a crank length) as girth that the tradition recumbent bicycle person's of riding left and right sides pin is wanted pedal all the time, and the rack drives recumbent bicycle person of riding left and right sides pin just can be kept the recumbent bicycle speed of advance with very little front and back displacement.

No matter this shows at a high speed, middling speed still is under the situation of low speed driving, the performance of rack drives recumbent bicycle has surmounted traditional recumbent bicycle comprehensively.

Claims (4)

1. recumbent bicycle, it comprises the formula of lying vehicle seat (9) and the front-wheel drive that is provided with on front-wheel (6), trailing wheel (11), the vehicle frame (10) that connects front and rear wheel, trailing wheel tap handle (8), the vehicle frame, it is characterized in that: it is straight-line rack drives mechanism that this f-w-d adopts, it comprise with front-wheel (6) wheel shaft bonded assembly ratchet (5), with the tooth bar (12) of ratchet (5) tooth mesh and with tooth bar bonded assembly pedal (1); This tooth bar (12) ratchet (5) that travels forward just drives front-wheel (6) and rotates, and front-wheel (6) is rolled advance, and tooth bar (12) moves backward, and ratchet (5) does not influence the normal rotation of front-wheel (6);

Each fixes a cover front-wheel drive inboard of the left and right arm of front-fork of this vehicle frame (10); Every cover front-wheel drive comprises a metal tube (7), be contained in the tooth bar (12) in the metal tube (7), metal tube (7) has openning with ratchet (5) intersection and makes inner tooth bar of metal tube (7) (12) and ratchet (5) engagement, this metal tube (7) leading portion outside has rectangular mouthful, and tooth bar (12) outer end is fixing with pedal (1) by rectangular mouthful; The pedal (1) and the connecting portion of tooth bar (12) can be moved in rectangular mouthful, also be provided with a Bringing-back mechanism between tooth bar (12) and the metal tube (7); The structure of this Bringing-back mechanism is the special purpose shoes that is buckled together with pedal.

2. recumbent bicycle according to claim 1 is characterized in that: this tooth bar (12) is for being horizontally disposed with.

3. recumbent bicycle according to claim 1 is characterized in that: this tooth bar (12) is engaged on ratchet (5) upside.

4. recumbent bicycle according to claim 1 is characterized in that: this metal tube (7) has the arc openning with ratchet (5) intersection and makes inner tooth bar of metal tube (7) (12) and ratchet (5) engagement.

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