CN2406910Y - Transmission of bicycle - Google Patents

Abstract

The utility model relates to a transmission mechanism of a bicycle, which comprises a pedal rod device with a return device; the pedal rod device is matched with a shift gear device which is matched with a wheel tooth device at the back of the bicycle. The utility model uses a lever transmission way and cancels a transmission way of a center shaft and a chain; using a simple clutch mechanism has simple and labor-saving structure, enlarges speed ratio and improves bicycle speed. The way of pedaling bicycles is different from the original way. The utility model uses generous stool, reduces wheels, and lightens bicycle weight. Compared with the traditional bicycle, the novel bicycle is quicker and more comfortable in use.

Description

A kind of transmission device of bicycle

The utility model relates to a kind of transmission device, refer in particular to a kind of lever transmission mechanism of bicycle.

Traditional bicycle utilizes gear wheel and chain gear, adopts this kind drive method the axis position that foot-operated sprocket wheel is installed to be set at central frame beam, make bicycle structurally difficulty innovation is arranged.Because middle wheelbase ground is very near, limited the length of the foot-operated arm of force, therefore comparatively to require great effort to pedal the time, special wheel is hour more in this.For the laborsaving speed ratio that can only reduce large and small two sprocket wheels, this has controlled the max speed of bicycle again.The path of motion of pedal is circular simultaneously, and the cyclist really acts on the merit of walking aspect so, and a pedal has only 1/3 track of whole circle, and 2/3 track of circle just makes pedal be turned back to can diligent again position.This mechanism lifts after stepping on before bipod needs to pedal the time, so bench is designed to narrow sharp formula, cyclist's whole body weight rides in the above, and this seat method ride period is a little long, will allow the people feel that perineum part and two femoribus internus swelling are numb very uncomfortable.

The purpose of this utility model just provides that a kind of features simple structure is laborsaving, large speed ratio, lift after stepping on before not needing, and can allow bicycle adopt the transmission device of big bench.

The purpose of this utility model is achieved in that transmission device comprises treadle, returning device, turning wheel, tooth rest, backgear, arrangement of clutch composition, at each side peace one cover of bicycle.Treadle is a stock, treadle is installed on the tooth rest with the treadle pivot pin at the rear portion of treadle, and the returning device that makes the treadle return is housed on the treadle; One end of turning wheel has stirs groove, and the other end is a gear-like, and turning wheel is installed on the tooth rest with the turning wheel pivot pin; Backgear is installed on the rear vehicle shaft.The rear end of treadle is stretched into stirring in the groove of turning wheel and is contacted with turning wheel, and the gear teeth of turning wheel are meshed with back-geared gear teeth, and the arrangement of clutch that makes turning wheel and the mutual clutch of backgear is arranged on the turning wheel.

The principle of work of transmission device is, when stepping on treadle, treadle is that rotate in the axle center with the treadle pivot pin, the race of stirring that treadle rear end upward movement drives turning wheel makes progress, making turning wheel is that rotate at the center with the turning wheel pivot pin, the cogged end of turning wheel drives backgear downwards and rotates, and backgear drives the back wheels of vehicle axle and rotates, and vehicle travels forward.Pin is upwards lifted, and treadle is the upward movement return under the effect of returning device, and the treadle rear end drives the handsetting gear counter-rotating, and at this moment, turning wheel is separated with backgear arrangement of clutch or backgear separates with rear vehicle shaft, and the motion of vehicle is not subjected to the influence of treadle return.After returning device makes the treadle front end get back to the extreme higher position, step on treadle, at this moment, after making turning wheel and backgear combination or backgear and rear vehicle shaft combines, arrangement of clutch repeats work.

Returning device can adopt extension spring to work independently.

Bicycle is each side using two transmission device work, between two treadles, use the return stay cord as returning device, two of return stay cord is buckled in respectively on two treadles, stay cord hangs in the pulley groove of vehicle body, the effect of return stay cord is to accomplish that when treadle steps up and down upper left bottom right, lower-left are upper right, two treadles can keep in turn work done, simultaneously with the rest that also can pause of two foot-operated firmly pedals.

Turning wheel requires to drive wheel when work done in coming back rotation, can not influence wheel movement again during counter-rotating, and this just needs arrangement of clutch.Arrangement of clutch has dual mode: a kind of is the mode of the turning wheel axis hole of turning wheel being made tiltedly microscler hole slot, when treadle is not operated, turning wheel is because the weight of self can stirred suitable hole slot landing on the wheel shaft, be parked in the upwards top of the hole slot of lengthening, when stepping on treadle, prize on the treadle tail end, when the power that turning wheel is upwards prized, turning wheel at first rises along turning wheel axis hole groove is upwards sliding on the turning wheel pivot pin, after arriving the round heart of gear of turning wheel rear end, promptly change and move to rotating, turning wheel and backgear just in time meshed to finish and drive backgear and rotated this moment, turning wheel glides because of deadweight and breaks away from and back-geared engagement when treadle stops to prize, thereby does not influence the rotation of wheel.Second kind of arrangement of clutch is the flywheel gear that backgear is adopted existing bicycle, the gear teeth of turning wheel and back-geared gear teeth keep engagement always, thereby, treadle drives the backgear rotation when driving the poke rod motion, the ratchet of rear wheel and back axle engagement, turning a wheel travels forward, and when the treadle return, during the turning wheel counter-rotating, ratchet in the backgear and rear vehicle shaft break away from, and backgear idle running can not influence wheel and move forward.

As further improvement transmission device, not end at treadle is provided with wheel fork, prizes wheel with prizing the wheel axle mounting in the fork, and what prize that wheel stretches into turning wheel stirs that groove is interior to contact with turning wheel, prize wheel and the power of treadle can be passed to turning wheel, reducing friction makes more easy and flexible of treadmill.

Transmission device also can adopt at the treadle tail end and adorn a connecting rod, the other end of connecting rod joins with the turning wheel that is provided with bent axle, and one group of push-and-pull shell fragment is housed on connecting rod, and purpose is to make treadle when up-and-down movement, drive the push-and-pull shell fragment and together move, backgear is the existing flywheel style that has pawl device.When turning wheel drove the rotation of backgear forward direction, ratchet and wheel interlock in the backgear were rotated wheel together, and when turning wheel pauses or reverse, pawl device in the backgear and axletree break away from, and backgear dallies, and can not influence the normal operation of wheel.

Can add pedal at the treadle front end in addition, strengthen the area of contact of treadle and sole, make foot-operated not only comfortable but also be convenient to firmly in the above.

The utility model adopts the lever driving method, has cancelled axis and chain transmission mode, and it is laborsaving to reform the back features simple structure like this with simple engaging and disengaging gear again simultaneously, can add large speed ratio again, improves the speed of a motor vehicle.Because mode can adopt roomy bench with in the past different to pedal, dwindles wheel, alleviates car weight.When this new car uses, more brisk than traditional vehicle, more comfortable.

Fig. 1 is the lateral plan that adopts lever driven bicycle.

Fig. 2 is treadle transmission device constitution diagram when the extreme higher position.

Fig. 3 is treadle transmission device constitution diagram when midway location.

Fig. 4 is treadle transmission device constitution diagram when extreme lower position.

Fig. 5 is treadle return transmission device constitution diagram when up.

Fig. 6 is the transmission device assembly drowing.

Fig. 7 is a transmission device constitution diagram when adopting flywheel.

Fig. 8 is the scheme drawing that adopts the transmission device of crank type.

Fig. 1 is made up of treadle 1, returning device, turning wheel 2, tooth rest 3, backgear 4, arrangement of clutch to the transmission device of embodiment 1 shown in Figure 6 with reference to the accompanying drawings.Treadle 1 is a stock, position at the rear portion of bar connects with tooth rest 3 with treadle pivot pin 5, the returning device that makes treadle 1 return is housed on the treadle 1, one end of turning wheel 2 has stirs race 6, the other end is a gear 7, turning wheel 2 usefulness are stirred wheel shaft 8 and are installed on the tooth rest 3, backgear 4 is installed on the rear vehicle shaft, in the not end wheel fork of treadle 1, prize wheel 10 with prizing wheel shaft 9 installations, prizing wheel 10 stretches into stirring in the groove 6 of turning wheel 2 and contacts with turning wheel 2, the gear 7 of turning wheel 2 and the gear teeth of backgear 4 are meshed, and the turning wheel axis hole 11 of turning wheel 2 is made the mode of tiltedly microscler hole slot.

The principle of work of transmission device is, when stepping on treadle 1, treadle 1 is that rotate in the axle center with treadle pivot pin 5, race 6 ends of stirring that treadle 1 rear end upward movement drives turning wheel 2 make progress, the power that turning wheel 2 is upwards prized, turning wheel 2 at first rises along oblique axis hole groove 11 is upwards sliding on turning wheel pivot pin 8, after arriving the gear center of circle of turning wheel 2 rear ends, change and move to rotating, turning wheel 2 and backgear 4 just in time meshed to finish and drive backgear 4 and rotated this moment, the gear 7 of turning wheel 2 rotates and drives backgear 4 rotations, and backgear 4 drives the back wheels of vehicle axles and rotates, and vehicle travels forward; Pin is upwards lifted, treadle 1 is the upward movement return under the effect of returning device, this moment, turning wheel 2 glided because of deadweight, also move forward simultaneously and break away from engagement with backgear 4, treadle 1 drives turning wheel 2 motions, and the motion of vehicle is not subjected to the influence of treadle 1 return, after returning device makes treadle 1 front end get back to the extreme higher position, step on treadle 1, at this moment, arrangement of clutch repeats work after making turning wheel 2 and backgear 4 combinations.

With reference to the accompanying drawings the transmission device of Fig. 6 and embodiment 2 shown in Figure 7 as different from Example 1 arrangement of clutch be not the mode that adopts oblique microscler hole slot, but backgear 4 is adopted the flywheel gear of existing bicycle, the gear teeth of the gear teeth of turning wheel 2 and backgear 4 are meshed, thereby, treadle 1 rotates 4 rotations of drive backgear when driving turning wheel 2, ratchet 14 in the backgear 4 and back axle engagement, drive wheel, and treadle 1 return, during turning wheel 2 counter-rotatings, ratchet in the backgear 4 and rear vehicle shaft break away from, backgear 4 idle running can not influence wheel movement.

The transmission device of embodiment 3 shown in Figure 8 with reference to the accompanying drawings as different from Example 1, treadle 1 tail end is not to adopt to prize the method transmission, but adorn a connecting rod 12 at treadle 1 tail end, the other end of connecting rod 12 joins with the turning wheel 2 that is provided with bent axle 13, when treadle 1 is stepped on, tail end is upwards movable, and the bent axle 13 of drivening rod 12 pulling turning wheels 2 becomes the rotation of straight-line motion one-tenth, turning wheel 2 is passed to rotation with it again and is kept ingear, the backgear 4 that the flywheel style of pawl device is arranged, when turning wheel 2 drives the rotation of backgear 4 forward direction, ratchet and wheel interlock in the backgear 4, wheel is rotated together, and when turning wheel 2 paused or reverses, pawl device in the backgear 4 and axletrees broke away from, backgear 4 dallies, and can not influence the normal operation of wheel.

In order to guarantee that bent axle 13 is that forward direction is rotated all the time, one group of push-and-pull shell fragment is housed on connecting rod, and purpose is to make to step on 1 bar when up-and-down movement, drives the push-and-pull shell fragment and together moves, when bent axle 13 promptly will forward top dead point to, the push-and-pull shell fragment has entered the state that draws, when bent axle 13 has just arrived top dead point, because the effect of elastic force, make bent axle 13 turn over this point rapidly, at treadle 1 return, when treadle 1 tail end moved downward, the revolution situation just can not take place in bent axle 13 in this way; And when bent axle forwards bottom dead point to 13 times, the push-and-pull shell fragment has entered the state that pushes away, so when bent axle 13 has just arrived bottom dead point, because elastic force effect, make bent axle 13 also turn over this point rapidly, when treadle 1 upwards spurred bent axle 13 works done again, bent axle 13 will keep rotating to same direction, the problem of the anti-rotation of mistake stop can not occur.

Claims (9)

1. the transmission device of a bicycle, comprise treadle, returning device, turning wheel, tooth rest, backgear, arrangement of clutch composition, it is characterized in that: treadle is a stock, rear positions at bar connects with tooth rest with the treadle pivot pin, the returning device that makes the treadle return is housed on the treadle, and turning wheel is installed on the tooth rest with the turning wheel pivot pin, and backgear is installed on the rear vehicle shaft, the not end of treadle drives turning wheel and rotates, and the gear teeth of turning wheel are meshed with back-geared gear teeth.

2. transmission device as claimed in claim 1 is characterized in that described returning device is extension spring.

3. transmission device as claimed in claim 1 is characterized in that when using two transmission device work, between two treadles with the return stay cord as returning device, the return stay cord hangs in the pulley groove on the vehicle body.

4. transmission device as claimed in claim 1, an end that it is characterized in that turning wheel has stirs groove, and the other end is a gear-like, and the rear end of treadle is stretched into stirring in the groove of turning wheel and is contacted with turning wheel.

5. transmission device as claimed in claim 4 is characterized in that described arrangement of clutch is that turning wheel axis hole with turning wheel makes tiltedly microscler.

6. transmission device as claimed in claim 4 is characterized in that described arrangement of clutch is the flywheel gear that backgear is adopted existing bicycle, and the gear teeth of turning wheel and back-geared gear teeth are meshed.

7. as the described arbitrary transmission device of claim 5 to 6, it is characterized in that the not end of treadle prizes wheel with prizing the wheel axle mounting, prize wheel and stretch into stirring in the groove of turning wheel and contact with turning wheel.

8. transmission device as claimed in claim 1, it is characterized in that the treadle tail end adorns a connecting rod, the other end of connecting rod joins with the big gear wheel that is provided with bent axle, one group of push-and-pull shell fragment is housed on connecting rod, purpose is to make treadle when up-and-down movement, and drive push-and-pull shell fragment together moves and makes bent axle not have anti-the situation appearance of upward bottom dead point rotation.

9. arbitrary transmission device as claimed in claim 1 is characterized in that being equipped with pedal before treadle.

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