CN2160609Y - Multifunctional transmission bicycle - Google Patents

Abstract

The utility model belongs to a drive device for bicycles, comprising the assembly of a front chain wheel and the speed variator of a chain. The assembly of the front chain wheel can be a fixed type or an adjustable type; the assembly comprises a fundamental circular wheel, a chain wheel for speed acceleration and labor saving, and a chain wheel for heavy-load and labor saving. The chain wheel for the speed acceleration can adopt a rhombus circular wheel, an approximate elliptical wheel or a long circular wheel, and the chain wheel for heavy-load and labor saving can adopt a rhombus circular wheel or an elliptical wheel. The speed variator can be operated by hands or automatically operates with single-stage or double-stage at high speed, and mainly comprises a centrifugal clutch, a flywheel, an inner sleeve, a rear shaft, a high speed gear, a low speed gear, a high speed flywheel and a lubricant device. The bicycle of the utility model has reasonable structure, high efficiency and labor saving.

Description

Multifunctional transmission bicycle

The utility model belongs to the driving device of bicycle, particularly relates to the self-shifting driving device of bicycle.

In the bicycle drive in the prior art, preceding sprocket wheel is generally circle, Long Circle and approximate ellipsoidal, and all there are various weak points in the preceding sprocket wheel of above-mentioned shape, is provided with the foot-operated power active position effect of performance as circular chain-wheel, and kinematic velocity is minimum; Though obround sprocket has been brought into play the effect on the active position of foot-operated power, has increased certain resistance, and chain has been produced impact; The approximate ellipsoidal sprocket wheel coexists mutually to ride on the power inoperative position with obround sprocket and has all increased resistance arm, can feel effort when riding, and can not carry out the transition to active position reposefully.Therefore, of the prior art before the problem that exists of sprocket wheel have: at first be that transmission agency is incomplete, promptly speed increasing force saving with protect the speed heavy duty, against the wind, the laborsaving co-occurrence simultaneously of climbing; Next is that design is unreasonable, and load carrying behaviour is poor.

In the bicycle drive of the prior art, speed change system is generally manually, takes wheeled step change, owing to be subjected to the restriction (being generally 14 teeth) of the minimum number of teeth, the most at a high speed than being generally about 4, and being in operation and need manually changing continually.

The purpose of this utility model is will overcome shortcoming of the prior art to propose a kind of preceding sprocket wheel combination of multi-functional driving bicycle of speed increasing force saving and the automatic shift device of high speed ratio.

In order to realize the purpose of this utility model, the utility model proposes a kind of later-model rhombus circle sprocket wheel and single-stage or the High-Speed Automatic transmission system of twin-stage gear transmission.

The sprocket wheel combination is to be combined by circle sprocket wheel, speed increasing force saving sprocket wheel and heavily loaded laborsaving sprocket wheel before the multi-functional driving bicycle of the present utility model, wherein the speed increasing force saving sprocket wheel can be selected rhombus circle wheel, approximate ellipsoidal wheel or Long Circle wheel for use, and heavily loaded laborsaving sprocket wheel can be selected rhombus circle wheel or approximate ellipsoidal wheel for use.According to permutation and combination; Can produce following six kinds of combinations (being the fixed type combination):

A, big rhombus circle wheel+circular wheel+little rhombus circle wheel;

B, big rhombus circle wheel+circular wheel+little approximate ellipsoidal wheel;

C, big approximate ellipsoidal wheel+circular wheel+little rhombus circle wheel;

D, big approximate ellipsoidal wheel+circular wheel+little approximate ellipsoidal wheel;

E, greatly enhance circular wheel+circular wheel+little rhombus circle wheel;

F, greatly enhance circular wheel+circular wheel+little approximate ellipsoidal wheel.

Wherein a, c, d are combined as best of breed for three kinds.

The sprocket wheel combination also proposes a kind of adjustable combination train before the multi-functional driving bicycle of the present utility model.The number of teeth that circle is wherein taken turns is decided to be even number.And two semicircles wheels of Yanzhong heart branch work, its elongation is become the Long Circle wheel, the distance of elongation is the integral multiple of pitch.

Therefore, multi-functional driving bicycle of the present utility model has following four kinds of functions:

1, the transmission agency of ordinary bicycle: be applicable to generally speaking and use;

2, speed increasing force saving, frequency conversion, speed change transmission agency: be applicable to long-distance laborsaving travelling, when the pedal average rate was rotated, bicycle produced the variable-frequency and variable-speed motion;

3, heavy duty, against the wind, climb laborsaving frequency conversion, speed changing function: be applicable to heavy duty, against the wind, when climbing, under the prerequisite of not slowing down, can reach the labour-saving effect;

4, High-Speed Automatic speed changing function: when cycle racing speed reaches a certain " critical speed ", the bicycle speed ratio increases automatically, become two-stage or multistage transmission by original single-stage driving, bicycle is moved under the situation of high speed ratio, when the speed at bicycle is lower than " critical speed ", become original single-stage driving again, be applicable in the suburb and run at high speed.

Be described in detail in conjunction with the embodiments with reference to accompanying drawing in order to specify multi-functional driving bicycle of the present utility model.Accompanying drawing has:

Fig. 1 is the scheme drawing of preceding sprocket wheel of the combination of multi-functional driving bicycle of the present utility model and automatic shift device;

Fig. 2 is for riding power at the site plan of justifying the effective torque that produces on the sprocket wheel;

Fig. 3 reaches the effective torque site plan that foot-operated power produces thereon for the technological characteristics of rhombus circle wheel;

Fig. 4-a, b are respectively facing and lateral plan of fixing preceding sprocket wheel combination;

Fig. 5-a, b are respectively facing and lateral plan of the preceding sprocket wheel of adjustable combination;

Fig. 6-a, b represent facing of single gear driving automatic changing speed device and cutaway view respectively;

Fig. 7 is twin-stage gear transmission automatic transmission with hydraulic torque converter and section-drawing.

In Fig. 1: 1 is preceding sprocket wheel combination; 2 is High-Speed Automatic transmission system; 3 is chain; 4 is tension wheel.

In Fig. 2: the effective torque that α 1 produces when this position for pedal; α 2 does not produce effective torque for pedal foot-operated power when this position, and this position is called inoperative position or " dead angle " position of foot-operated power; Foot-operated power produced maximum effective torque when α 3 was in this position for pedal.

In Fig. 3:

Being respectively connection is the circular arc in the center of circle with O Be the circular arc in the center of circle with O1

Linear portion; α 2 is corresponding to the inoperative position of foot-operated power, makes the sprocket wheel on the go therefore not feel effort from the inoperative position smooth transition of foot-operated power to active position; α 3 puts corresponding to the most significant digit of foot-operated power.

Line is the integral multiple of pitch, each arc section

, Residual circle wheel for the whole number of teeth.Total number of teeth is 2X

Curved tooth number+2X

Curved tooth number+4X

The string pitch number.

In Fig. 4: 41 is the typical circular sprocket wheel, is the primary circle wheel again; 42 expression speed increasing force saving abnormity wheels, condition is the radius that its minor axis equals the primary circle wheel; The laborsaving abnormity wheel of 43 expression heavy duties; Condition is the radius that its major axis is approximately equal to the primary circle wheel.

In Fig. 5: 51 are the semicircle wheel, are the primary circle wheel during merging, are oval the wheel when drawing back; 52 is the heavy duty wheel, can be rhombus circle wheel or approximate ellipsoidal wheel; 53 is slide block; 54 is cam; 55 is spring; 56 is axle sleeve; 57 is axis; 58 is the crank of pedal.The primary circle wheel is made up of two equal semicircle wheels, finishes general utility functions; The speed increasing force saving wheel is made up of two semicircle wheels that draw back width between centers, is designed to two grades among the figure, to satisfy different speedup requirements; Heavy duty wheel is the tight pulley that is fixed on the pedal crank, finishes against the wind, climbing function.

In Fig. 6: 61 is shell; 62 is centrifugal clutch; 63 is flywheel; 64 is interior cover; 65 is rear axle; 66 is high speed gear; 67 is low speed gear; 68 is high speed flywheel; 69 are sliding ravine device; 70 is torsion spring; 4 is tension wheel.

Be single gear driven high-speed automatic shift device shown in Fig. 6, cycle chain drives flywheel 63 just to be changeed, and by flywheel 63 power is passed to interior cover 64, and interior cover 64 connects rear wheels, turns a wheel, and interior cover 64 is captiveed joint with the interior pawl of centrifugal clutch 62; Cycle chain also drives high speed flywheel 68 backward rotation simultaneously, and rotates by high speed flywheel 68 driven gears 66,67, and high speed gear 66 is fixedly connected with the overcoat of power-transfer clutch 62.When cycle racing speed subcritical speed, power drives flywheel 63 from chain and passes to interior cover 64, and high speed flywheel 68, high speed gear 66 and just idle running of power-transfer clutch 62 do not have power; During greater than critical speed, power-transfer clutch 62 is connected in speed, and flywheel 63 just dally, and power is passed to counter-rotational high speed flywheel 68 from chain length, drives high speed gear 66, overlaps 64 in by power-transfer clutch 62 power being passed to.The speed ratio of this change-speed box can be designed as i=1.5-2, and concrete ratio can be decided as required.

The critical component of automatic shift device is a centrifugal clutch, and it can adopt " pawl " formula centrifugal clutch or " piece " formula centrifugal clutch.

In Fig. 7: 71 is shell; 72 is centrifugal clutch; 73 is flywheel; 74 is interior cover; 75 is rear axle; 76 is the one-level multiplying wheel; 77 is the secondary high speed gear; 78 is the secondary low speed gear; 79 is lubricious device; 4 is tension wheel.

Twin-stage gear transmission automatic shift device shown in Figure 7 also can adopt two kinds of above-mentioned centrifugal clutches; The low speed wheel of one-level multiplying wheel 76 passed to power by chain by flywheel 73 when critical speed is following, on the low speed wheel of one-level multiplying wheel 76, unidirectional ratchet, detent mechanism are housed equally, again power is passed to interior cover 74 with flywheel 73 the same gears 76, interior cover 74 is fixedly connected with wheel, drive wheel movement, other takes turns just idle running; When critical speed is above, after power is passed to one-level multiplying wheel 76, power is passed to the secondary multiplying wheel, cover 74 in by centrifugal clutch 72 power being passed to again drives wheel movement.The speed ratio of twin-stage multiplying wheel transmission can be designed to i=1.5-2.Tension wheel 4 among the figure when this change-speed box is used on the Regular Bicycle, can not need to install, and lubricious the employing released oil, injects by lubricating cup.

High-Speed Automatic transmission system of the present utility model, centrifugal clutch wherein can be connected one-level or two-stage gear transmission, make transmission become two-stage or multistage transmission, and overall ratio can improve 0.5-1.0 doubly.When bicycle speed subcritical speed, centnifugal force is not enough to keep centrifugal clutch, and power-transfer clutch is just opened automatically, make bicycle get back to the state of original single-stage driving, manually " switch " is housed on centrifugal clutch, for the needs automatic speed changing time, shuts " switch " and get final product.Simultaneously, " critical speed " control apparatus is housed also on power-transfer clutch, the size of the centnifugal force that its may command power-transfer clutch folding is required, thus regulated the size of critical speed.Lubricious device in the automatic shift device can reduce friction loss, because speed change system is the on the go self-shifting, so there is not the static friction of system, that is to say it is speed change on the basis of dyanainic friction, although therefore speed ratio increases a lot, can not feel to require great effort very much yet.Except that adopting automatic speed changing, also can adopt manual high speed speed change.Specific embodiment is as follows:

Preceding sprocket wheel adopts fixed combination, and back automatic shift device adopts single gear driven high-speed automatic speed changing; Before take turns the Z=48 tooth substantially in the sprocket wheel combination, multiplying wheel is selected rhombus circle wheel Z=58 tooth for use, the heavy duty wheel is selected rhombus circle wheel Z=42 tooth, the flywheel Z=18 tooth of automatic transmission with hydraulic torque converter, high speed flywheel Z=18 tooth, one-level multiplying wheel speed ratio i=1.8 for use.

Common or speed ratio: i=48/18=2.667 generally speaking

Speed ratio under the situation of laborsaving speedup: i=58/18=3.222, speedup 20.83%

Speed ratio: i=42/18=2.333 under the situation of heavy duty speedup slows down 12.5%

Use behind the automatic transmission with hydraulic torque converter the most at a high speed than i=48/18 * 1.8=4.8, speedup 80%;

Use automatic transmission with hydraulic torque converter and speed increasing force saving wheel speed ratio: i=58/18 * 1.8=5.8, speedup 117.5%;

If the speed of a motor vehicle of ordinary bicycle is 17 kilometers/hour, using 20.54 kilometers/hour of speed increasing force saving wheel back car scooters, if in conjunction with automatic shift device, 37 kilometers/hour of bicycle car scooters.

The drive disk assembly composite design that this shows multi-functional driving bicycle of the present utility model is reasonable, but but also hand gear of automatic speed changing, but single-stage driving or multistage transmission, chain gear or gear transmission, speed ratio can design as requested, both applicable to general use, also is applicable to heavy duty, the usefulness of riding at a high speed, laborsaving saving time, efficient convenient.

Claims (5)

1, a kind of multi-functional driving bicycle, it is important to constitute driving system by preceding sprocket wheel, chain, transmission system, it is characterized in that described preceding sprocket wheel is a kind of combination, comprise the primary circle wheel, speed increasing force saving sprocket wheel and heavily loaded laborsaving sprocket wheel, described speed increasing force saving sprocket wheel can adopt rhombus circle wheel, approximate ellipsoidal wheel or Long Circle wheel, and the laborsaving sprocket wheel of described heavy duty can adopt rhombus circle wheel or approximate ellipsoidal wheel; Described transmission system mainly comprise centrifugal clutch, flywheel, interior cover, rear axle, at a high speed, gear, low speed gear, high speed flywheel, lubricious device and tension wheel.

2, bicycle as claimed in claim 1, it is characterized in that described preceding sprocket wheel combination can be fixed type or adjustable, wherein adjustable front-wheel combination comprises that two semicircle wheel, heavy duties that space out economize wheels and cam, and described heavy duty economizes wheels can adopt rhombus circle wheel or approximate ellipsoidal wheel.

3, bicycle as claimed in claim 1, it is characterized in that described transmission system can be manual, single-stage or the High-Speed Automatic speed change of twin-stage, described twin-stage automatic shift device mainly comprises centrifugal clutch, flywheel, interior cover, rear axle, one-level multiplying wheel, secondary high speed gear, secondary low speed gear and lubricious device.

4, bicycle as claimed in claim 1 is characterized in that described centrifugal clutch can adopt pawl formula centrifugal clutch or piece formula centrifugal clutch.

5, bicycle as claimed in claim 1 is characterized in that described preceding sprocket wheel combination can have following several combination:

A) big rhombus circle wheel+circular wheel+little rhombus circle wheel;

B) big rhombus circle wheel+circular wheel+little approximate ellipsoidal wheel;

C) big approximate ellipsoidal wheel+circular wheel+little rhombus circle wheel;

D) big approximate ellipsoidal wheel+circular wheel+little approximate ellipsoidal wheel;

E) greatly enhance circular wheel+circular wheel+little rhombus circle wheel;

F) greatly enhance circular wheel+circular wheel+little approximate ellipsoidal wheel.

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