CN2167039Y - Stepless speed-adjustable motor bicycle - Google Patents

Abstract

The utility model relates to an eccentric changeable driving stepless speed regulating motorcycle. A friction wheel, a crankshaft sprocket and a connecting rod are installed on the crank shaft of an existing motorcycle engine, and a driven sprocket is installed on the other end of the connecting rod. A grooved pulley in one-way driving with a main shaft is installed on the main shaft of a clutch and the main shaft is plugged on a radial groove on the grooved pulley through a transmission rod on the driven sprocket to realize transmission. A mechanical position shifting device which is transmitted through the friction wheel is installed in the box body of the engine to alter the eccentric distance between the driven sprocket on the top part of the connecting rod and the grooved wheel for realizing eccentric changeable stepless speed regulation transmission. The utility model has the advantages of simple structure, reliable performance and automatic speed regulation, being suitable to be used for various type motorcycles.

Description

Stepless speed-adjustable motor bicycle

The utility model relates to a kind of infinite speed variation motor bike, and refering in particular to is a kind of eccentric no-load voltage ratio transmission infinite speed variation motor bike.

Existing stepless speed-change motorcycle is to adopt triangular tooth (or V-type) belt stepless change.Its shortcoming be grown belt the time can be elongated, cause and skid, make transmitting ratio unreliable.Therefore, general high-power motor bike does not all adopt, in addition, existing motor bike is because of the work characteristics of its driving engine, make the moment of torsion of output be cyclical variation, in a certain zone in expansion space stroke, its moment of torsion maximum, in exhaust, compression stroke, then rely on the inertia of flywheel to obtain moment of torsion, therefore output torque is corresponding reduces, and in same gear, the transmitting ratio of motor bike is constant, thereby when output torque reduces, be disadvantageous to the work of driving engine.

The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of and can be automatically carry out the eccentric no-load voltage ratio transmission infinite speed variation motor bike that infinite speed variation and its instantaneous transmission ratio and bent axle output torque basic synchronization change according to load and engine speed.

The utility model is installation one bent axle friction wheel, a crankshaft sprocket and a connecting rod between starter pinion on the existing motorcycle engine crankshaft and crank that adopts following proposal to realize.The other end of connecting rod is equipped with a driving chain wheel, the driving chain wheel sidewall be provided with a drive link and be inserted into be located at the coaxial mounted sheave outer rim of engine clucht main shaft on the radially vertical slot that is subjected to the arm of force in, on clutch spindle, be set with a hollow shaft that links to each other with the power-transfer clutch secondary part by antifriction-bearing box.One end of hollow shaft is provided with a deceleration sprocket wheel that links to each other with the motor bike deceleration system, by antifriction-bearing box one rotating shaft is installed between bent axle in engine housing and the power-transfer clutch, one end of rotating shaft is provided with a friction wheel and bent axle friction wheel Contact Transmission, the other end is provided with ball shelves and by stage clip displacement cover and steel ball is pressed against on the ball shelves and axial location, neck at the displacement cover also is set with a displacement sleeve, which is provided with one with the parallel inclined guide in the outer inclined-plane of displacement cover, the other end of inclined guide is inserted in the through hole on the connecting rod and with the driven sprocket location of interlinking lever end, with the coaxial position of sheave on.

Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is a stepless speed-regulating device structural representation in the utility model.

Accompanying drawing 2 is the B-B of an A portion cutaway view in the accompanying drawing 1

Accompanying drawing 3 is the D-D of a C portion cutaway view in the accompanying drawing 1.

Referring to accompanying drawing 1,2,3, the utility model is to change the gear speed-changing mechanism in the existing motor cycle engine into eccentric no-load voltage ratio stepless speed regulation, and its improvement main points are: between starter pinion 5 on the bent axle 2 of existing motor cycle engine and crank a connecting rod 7 is installed successively.A crankshaft sprocket 3 and a bent axle friction wheel 1, the other end of connecting rod 7 are equipped with a driven sprocket 17 and link to each other with crankshaft sprocket 3 by chain.Be equipped with one at an end of the main shaft 25 of engine clucht and be the sheave 22 of unidirectional transmission with main shaft 25.On main shaft 25, also be set with a hollow shaft 24 that links to each other with power-transfer clutch secondary part 11 simultaneously by antifriction-bearing box.The other end of hollow shaft 24 is equipped with a deceleration sprocket wheel 23 that links to each other with the motor bike retarder by chain, be provided with on the outer rim of sheave 22 one guide groove radially arranged on it be subjected to the arm of force 19, the drive link of being located on driven sprocket 17 sidewalls 18 is inserted in the radially guide groove that is subjected to the arm of force 19, on the engine housing inwall, between bent axle 2 and the power-transfer clutch 10, by bearing installation one rotating shaft 4 is arranged, an end of rotating shaft be equipped with one with the friction wheel 8 of bent axle friction wheel 1 Contact Transmission.The other end of rotating shaft 4 is provided with ball shelves 9.And bowl-shape displacement cover 6 and steel ball 12 are pressed against on the ball shelves 9 and axial location by stage clip 14.Displacement sleeve 13 is installed in the neck of displacement cover 6 by antifriction-bearing box.Which is provided with one with the parallel inclined guide 16 in bowl-shape displacement cover 6 outer inclined-planes, the other end of inclined guide 16 is inserted in the through hole be located on the connecting rod 7 and the driven sprocket 17 of connecting rod 7 ends is positioned at the position coaxial with sheave 22.

Principle of work of the present utility model is summarized as follows: when driving engine was not worked, inclined guide 16 was positioned at the position coaxial with sheave 22 with the driven sprocket 17 of connecting rod 7 ends, and at this moment, the transmitting ratio minimum of total car equals the product of sprocket ratios at different levels.When the engine operation rotating speed was low, bent axle friction wheel 1 drove rotating shaft 4 by friction wheel 8. Steel ball 12 and 6 rotations of displacement cover, at this moment, invar ball 12 rotative speeds are less, its centnifugal force than stage clip 14 to give pressure little, when engine speed improves, the rotating speed of steel ball 12 also increases, centnifugal force that its rotation produces also increase and will overcome the giving pressure of stage clip 14 and vertically with displacement cover 6 to extrapolation, driving displacement sleeve 13 outwards moves, and by inclined guide 16 compressing connecting rods 7, make it to lower swing, thereby, the driven sprocket 17 of connecting rod 7 ends produces an eccentric throw with sheave 22, like this, when the drive link on the driven sprocket 17 18 when upper half rotates, the transmission force in the arm of force 19 that is subjected on the sheave 22 moves down, transmission radius is diminished, at this moment, it is big that the instantaneous transmission ratio of motor bike just becomes, and owing to cooperatively interacting of crankshaft sprocket 3 and driven sprocket 17, make that the moment of bent axle 2 output torque peaks is corresponding substantially with the moment that motor bike obtains the maximum instantaneous transmitting ratio, along with engine piston moves down, the bent axle moment of torsion begins to diminish gradually, the transmission radius of sheave also begins to increase gradually, the instantaneous overall gear ratio of motor bike reduces gradually, thereby make motor bike transmitting ratio and its output torque keep synchronous variation substantially, the operating characteristic that has adapted to machine preferably, when the drive link on the driven sprocket 17 18 was in the lower half rotation, sheave driving force point radius increased, sheave is made decelerated movement, because of sheave is unidirectional transmission to clutch spindle 25, therefore can not influence the rotating speed of power-transfer clutch, power-transfer clutch will rely on inertia to surmount sheave at lower half and rotate, motor bike is at this moment also by inertia traveling, thereby load breaks away from, and when bent axle just in time was in this moment and obtains moment of torsion from flywheel, the expenditure of energy of flywheel was less like this.When the speed of a motor vehicle further improves, eccentric throw between driven sprocket and the sheave further increases, the instantaneous transmission ratio of motor bike further strengthens, the speed of a motor vehicle further improves, otherwise, when engine speed because of load or when artificially descending, the steel ball rotative speed reduces, centnifugal force reduces, and stage clip promotes displacement sleeve and moves inward.By inclined guide connecting rod is upwards stirred, eccentric throw reduces, and the sheave transmission radius increases, and the instantaneous transmission ratio of motor bike reduces, and the speed of a motor vehicle is reduced.

In sum, the utlity model has simple in structure.Dependable performance, the energy automatically regulating speed of a motor vehicle makes the period of change of motor bike transmitting ratio and output torque synchronous, has adapted to the operating characteristic of driving engine preferably, and the motor bike that is suitable for various models uses.

Claims (1)

1. A kind of eccentric no-load voltage ratio transmission infinite speed variation motor bike, be on existing motor bike basis, to improve to form, it is characterized in that between starter pinion 5 on the existing motorcycle engine crankshaft 2 and crank, a connecting rod 7 being installed successively, a crankshaft sprocket 3 and a bent axle friction wheel 1, the other end of connecting rod 7 is equipped with a driven sprocket 17 and links to each other with crankshaft sprocket 3 by chain, be equipped with one at an end of the main shaft 25 of engine clucht and be the sheave 22 of unidirectional transmission with main shaft 25, on main shaft 25, also be set with simultaneously the hollow shaft 24 of a termination power-transfer clutch secondary part 11 by antifriction-bearing box, the other end of hollow shaft 24 is equipped with a deceleration sprocket wheel 23 that links to each other with the motor bike retarder by chain, on the outer rim of sheave 22, be equipped with one which is provided with guide groove radially be subjected to the arm of force 19, the drive link of being located on driven sprocket 17 sidewalls 18 is inserted in the radially guide groove that is subjected to the arm of force 19, on the engine housing inwall, by bearing installation one rotating shaft 4 is arranged between bent axle 2 and the power-transfer clutch 10, one end of rotating shaft 4 be equipped with one with the friction wheel 8 of bent axle friction wheel 1 Contact Transmission, the other end of rotating shaft 4 has ball shelves 9, bowl-shape displacement cover 6 and steel ball 12 are pressed against on the ball shelves 9 and axial location by stage clip 14, displacement sleeve 13 is installed in the neck of displacement cover 6 by antifriction-bearing box, which is provided with an inclined guide 16 parallel with the outer inclined-plane of bowl-shape displacement cover 6, the other end of inclined guide 16 is inserted in the through hole be located on the connecting rod 7 and the driven sprocket 17 of connecting rod 7 ends is positioned at the position coaxial with sheave 22.

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