CN2692016Y

CN2692016Y - pedal direction controllable speed change bicycle

Info

Publication number: CN2692016Y
Application number: CN 200420000372
Authority: CN
Inventors: 吴克忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-09
Filing date: 2004-01-09
Publication date: 2005-04-13
Anticipated expiration: 2014-01-09

Abstract

The utility model provides a speed changing bicycle with controllable pedal direction, comprising a double chained transmission system and a sprocket wheel clutch. The double chained transmission system comprises double sprocket wheels, double chains, double flywheels and a bracket; wherein, a plurality of pin rolls matching conical bores on the outer sprocket wheel are distributed evenly on the inner sprocket wheel, the outer sprocket wheel is fixed on the right end of a centre shaft, and the inner sprocket wheel matches on the right side of the centre shaft in a sliding way; the inner chain is wound on the inner sprocket wheel and the inner flywheel through two guide pulleys on the bracket; the sprocket wheel clutch is four bar linkage formed by a fixed mount, a shifting fork, a connecting rod and a control rod, the head and tail of each rod are hinged together and fixed on the inclined tube of the bicycle by the fixed mount, and a clutch handle on the handle of the bicycle is connected with the control rod through a wire cable. The bicycle of the utility model can travel forward no matter the bicycle is stepped in a positive way or in a negative way; besides, the inner sprocket wheel is in parallel move and is not easy to incline; the clutch is reliable and the chain is not easy to drop.

Description

Foot-operated direction variable speed controllable bicycle

Technical field

The utility model relates to bicycle, refers to a kind of foot-operated direction variable speed controllable bicycle that changes foot-operated direction all can be to overtake especially.

Background technology

The trip that existing bicycle is people, body-building etc. have brought convenience, are a kind of environmentally friendly machines, are subjected to liking of the common people deeply.

But Regular Bicycle is a strand formula driving system, has only to step forward and could ride for a long time to moving ahead, and very easily makes the body local muscular fatigue, and it is unbalanced to cause the human muscle to grow; My in the past patented technology (as CN2220416Y) and for example, though it can be stepped on and move ahead, can not normally control the positive inverse operation of foot-operated direction like a cork, the phenomenon that chain comes off from sprocket wheel often appears, bring all troubles and inconvenience to the cyclist, thereby influenced its application.

Summary of the invention

The purpose of this utility model is: at the problem of prior art existence, a kind of foot-operated direction variable speed controllable bicycle is provided, it is no matter whether people carry out the clutch operation of inner sprocket, can both overcome the Dou that inclines of inner sprocket, inside and outside sprocket wheel left reliably or close, thus solve effectively because of sprocket wheel incline the Dou clutch unreliable produce the chain phenomenon.

The technical solution of the utility model: a kind of foot-operated direction variable speed controllable bicycle mainly comprises: double-chain driving system and sprocket wheel power-transfer clutch; This double-chain driving system comprises: be loaded on the inside and outside sprocket wheel on axis right side, inside and outside chain is loaded on the inside and outside flywheel on trailing wheel right side and has a support of two guide wheels; The bearing pin that conical bore on this inner sprocket circumference on uniform number and the outer sprocket wheel is complementary, be somebody's turn to do outer sprocket wheel and the one-body molded right-hand member head that is fixed in axis of crank, inner sprocket central authorities are provided with the through hole cunning and are assigned in the axis right side, outer chain is wound on outer sprocket wheel and the outer flywheel, and interior chain is wound on inner sprocket and the interior flywheel by two guide wheels on the bracket of back axle; It is characterized in that:

This sprocket wheel power-transfer clutch constitutes four-bar linkage by fixed mount, shift fork, connecting rod, control stalk, each bar respective end is hinged each other, be provided with pull back spring in it, the fixed mount of this four-bar linkage is fixed near the inclined tube of axis, one steel rope, one end is connected in control stalk, and the other end is connected with clutch handle on the handlebar.Wherein:

The upper boom of described four-bar linkage is that fixed mount is the ㄇ type, and lower beam is that shift fork is the ∩ type, and its both sides are respectively equipped with pusher dog, and left bar is that connecting rod is vertical, and its upper end is a sector, and right bar is that control stalk is the L type.

The circumference place of described inner sprocket sets firmly an annulus, and this annulus places in the pusher dog, and shift fork inserts on axis, and annulus is stirred in translation vertically, inside and outside sprocket wheel is hung close or is separated.

Described fixed mount is provided with a screw, and the distance between this screw scalable and sector is with the axial location of control shift fork.

Described pull back spring is located between connecting rod and the shift fork to good.

Be evenly equipped with several ends on the suitable circumference of described inner sprocket and be cone shape bearing pin, be evenly equipped with the conical bore that is complementary with bearing pin on the corresponding circumference of outer sprocket wheel, and the bearing pin outside diameter is less than the diameter of conical bore small end.

Advantage of the present utility model is; Because four-bar linkage is when rotating clutch handle, shift fork can promote the annulus translation under action of the spring, inner sprocket slippage is vertically hung with outer sprocket wheel close, and then stepping on, just stepping on all can be to overtake; When counter-rotating during clutch handle, steel rope spurs four connecting rods, makes inner sprocket break away from outer sprocket wheel by shift fork, then just stepping on to overtake or speed change to overtake, therefore, control the clutch of sprocket wheel power-transfer clutch, no matter just step on, step on all and can guarantee to overtake; Under steam, can reliably switch foot-operated direction, effectively alleviate the fatigue of body local muscle, reach the purpose of body-building; And, in the clutch process of sprocket wheel power-transfer clutch or in the driving process, inner sprocket is difficult for the Dou that inclines, do not close not firm and fall the phenomenon of chain so can not hang.

Description of drawings

Fig. 1, be front view of the present utility model.

Fig. 2, be the birds-eye view of the double-chain driving system of the utility model.

Fig. 3, look scheme drawing for the master of the utility model sprocket wheel power-transfer clutch.

Fig. 4, be among Fig. 3 A-A to view.

The specific embodiment

Shown in Fig. 1-3, a kind of foot-operated direction variable speed controllable bicycle mainly comprises: double-chain driving system 2 and sprocket wheel power-transfer clutch 3; Wherein:

Double-chain driving system 2 comprises: be loaded on the inside and outside

sprocket wheel

21,22 on axis right side, inside and

outside chain

23,24 is loaded on the inside and

outside flywheel

25,26 on trailing wheel right side and has a support 29 of two guide wheels 27,28.

Wherein be evenly equipped with several ends on the inner sprocket 21 suitable circumference and be cone shape bearing pin 211, be evenly equipped with the conical bore 221 that is complementary with bearing pin 211 on the corresponding circumference of outer sprocket wheel, and bearing pin 211 outside diameters are less than the diameter of conical bore 221 small ends; Outer sprocket wheel 22 and the crank 11 one-body molded right-hand member heads that are fixed on axis, inner sprocket 21 central authorities are provided with through hole and sliding being assigned on the axis right side, at its suitable circumference place by number bolt 212 affixed annulus 213.

During referring to Fig. 2, assembling, outer chain 24 is wound on outer sprocket wheel 22 and the outer flywheel 26 (or turriform flywheel), and interior chain 23 is wound on inner sprocket 21 and the interior flywheel 25 by two guide wheels 27,28 on the support 29.

Constitute four-bar linkage referring to Fig. 3,4, sprocket wheel power-transfer clutch 3 by fixed mount 31, connecting rod 32, shift fork 33, control stalk 34, the upper boom of this four-bar linkage is a fixed mount, and lower beam is a shift fork, and left bar is a connecting rod, and right bar is that control stalk is the L type; The fixed mount 31 of this four-bar linkage is the ㄇ type and is fixed near the inclined tube 1 of bicycle middle shaft, shift fork 33 is the ∩ type and inserts on axis, its both sides are respectively equipped with two pusher dogs 331, one annulus places in the pusher dog 331, and, inner sprocket 21 slippage vertically and outer sprocket wheel 22 are hung close or separated with the mobile annulus 213 that is fixed on the inner sprocket 21 of stirring of shift fork 33; The connecting rod 32 of this four-bar linkage is vertical, its upper end is a sector, this connecting rod 32 is hinged with fixed mount 31, shift fork 33 respectively, establish a screw on the described fixed mount 31, distance between this screw scalable and sector, axial location with control shift fork 33, this control stalk 34 is L-shaped, wherein Yi Bian two ends are hinged with fixed mount 31, shift fork 33 respectively, the outer end of another side is connected with a steel rope 4, be provided with pull back spring in the four-bar linkage, this pull back spring is located between connecting rod 32 and the shift fork 33 to good.

One end of one steel rope 4 is fixed on (not shown) on the clutch handle, and the other end is connected with control stalk 34.

During use, rotate clutch handle, lean on the shape of the effect change four-bar linkage of spring, stir annulus 213 by shift fork 33, inner sprocket 21 slippage is vertically hung with outer sprocket wheel 22 close, then stepping on, just stepping on all can be to overtake; When the counter-rotating clutch handle, the pusher dog 331 of the shift fork 33 of four-bar linkage is oppositely stirred annulus 213, makes inner sprocket 21 break away from outer sprocket wheel 22, is then just stepping on and can ride the just contrary purpose that all can run forward of direction so can reach to overtake.

Claims

1, a kind of foot-operated direction variable speed controllable bicycle mainly comprises: double-chain driving system and sprocket wheel power-transfer clutch; This double-chain driving system comprises: be loaded on the inside and outside sprocket wheel on axis right side, inside and outside chain is loaded on the inside and outside flywheel on trailing wheel right side and has a support of two guide wheels; The bearing pin that conical bore on this inner sprocket circumference on uniform number and the outer sprocket wheel is complementary, be somebody's turn to do outer sprocket wheel and the one-body molded right-hand member head that is fixed in axis of crank, inner sprocket central authorities are provided with the through hole cunning and are assigned in the axis right side, outer chain is wound on outer sprocket wheel and the outer flywheel, and interior chain is wound on inner sprocket and the interior flywheel by two guide wheels on the bracket of back axle; It is characterized in that:

This sprocket wheel power-transfer clutch constitutes four-bar linkage by fixed mount, shift fork, connecting rod, control stalk, each bar respective end is hinged each other, be provided with pull back spring in it, the fixed mount of this four-bar linkage is fixed near the inclined tube of axis, one steel rope, one end is connected in control stalk, and the other end is connected with clutch handle on the handlebar.

2, foot-operated direction variable speed controllable bicycle according to claim 1, it is characterized in that: the upper boom of described four-bar linkage is that fixed mount is the ㄇ type, lower beam is that shift fork is the ∩ type, its both sides are respectively equipped with pusher dog, left side bar is that connecting rod is vertical, its upper end is a sector, and right bar is that control stalk is the L type.

3, foot-operated direction variable speed controllable bicycle according to claim 2, it is characterized in that: the circumference place of described inner sprocket sets firmly an annulus, and this annulus places in the pusher dog, and shift fork is inserted on axis, and annulus is stirred in translation vertically, inside and outside sprocket wheel is hung close or is separated.

4, foot-operated direction variable speed controllable bicycle according to claim 2, it is characterized in that: described fixed mount is provided with a screw, and the distance between this screw scalable and sector is with the axial location of control shift fork.

5, foot-operated direction variable speed controllable bicycle according to claim 1 is characterized in that: described pull back spring is located between connecting rod and the shift fork to good.

6, foot-operated direction variable speed controllable bicycle according to claim 1, it is characterized in that: be evenly equipped with several ends on the suitable circumference of described inner sprocket and be cone shape bearing pin, be evenly equipped with the conical bore that is complementary with bearing pin on the corresponding circumference of outer sprocket wheel, and the bearing pin outside diameter is less than the diameter of conical bore small end.