CN2299799Y

CN2299799Y - Bicycle drive

Info

Publication number: CN2299799Y
Application number: CN95204909U
Authority: CN
Inventors: 傅斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-08
Filing date: 1995-03-08
Publication date: 1998-12-09
Anticipated expiration: 2005-03-08

Abstract

The utility model relates to a bicycle driving device, which is a device that a one-way driving force is transmitted to a driving wheel of the bicycle, so as to cause the bicycle to move forward. The problems to be solved by the device is to further increase the speed of the bicycle. The main technical characteristic is that drive rods (3), (10) are caused to swing within a range of positive and negative 30 DEG in a distance from a horizontal line, and an acting force F can generate near the maximum kinetic moment to the drive rods (3), (10). The utility model adopts a double-stage driving, so as to obtain a larger transmission ratio to meet the requirement of high speed.

Description

A kind of bicycle driving device

The utility model relates to and a kind of unidirectional drive power being sent on the bicycle adhesion wheel, thereby makes the proal device of bicycle.

Bicycle is a kind of non-maneuverable vehicle, the bicycle driving mode that can see on the market all be drive spindle under the effort of pin, do 360 degree around anchor shaft and rotate, make that bicycle can ahead running thereby produce drive torque.We can carry out the analysis of power to this type of drive.

Fig. 1 is the force analysis figure of a drive spindle in this actuating device;

Below Fig. 1 is described:

Pedal (2) links to each other with drive spindle (6) by bearing pin (3) in this device, and rotates around anchor shaft (7) together, and F is that the application force of pin can be thought the direction on perseverance edge (1), M _FFor the directive effect along (4) goes up resisting moment at drive spindle (6), θ is drive spindle (6) and horizontal angle, and α is the angle of drive spindle (6) and perpendicular line.R is drive spindle (a 6) stress point moving radius.

Analyze pedal (2) and move to B quadrntnt stressing conditions from A:

Active moment M _e=F.R.cos0----------------------------formula 1

Work as M _e＞M _fThe time, the bicycle accelerated movement

Work as M _e=M _fThe time, the bicycle uniform movement

Work as M _e＜M _fThe time, the bicycle decelerated movement

When we travel forward at the needs bicycle, should quicken or at the uniform velocity travel, do not wish to occur M _e＜M _fSituation

Work as M _e=M _fThe time, F.R.cos θ=M _f

θ=arccosM then _f/ F, R---------------------------formula 2

M in the formula 1 _f/ R is a definite value, and F is the application force of pin, can not surpass a maxim F _MaxSo, can obtain

The maxim θ of θ _Max

θ _Max=arccosMf/F _Max.R--------------------------formula 3

By formula 2 and formula 3 as can be known, in the quadrant of B, θ can be from 0～θ at diagram A _MaxChange θ _Max＜90 degree make α=90 degree-θ _Max, then in quadrant, exist the interior bicycle of circumference at α angle to be in deceleration regime.Bicycle is in deceleration regime in there is the circumference at 4a angle in the circumference in 360 degree so, thereby makes can not further the improving of bicycle speed of this type of drive.

At present and find no the method that better overcomes the above problems.

The purpose of this utility model is that a kind of improved bicycle driving device will be provided, and improves bicycle speed effectively.

The purpose of this utility model is achieved in that and allows bicycle both sides drive spindle swing up and down in distance horizon ± 30 degree scopes around anchor shaft, makes propulsive effort can obtain to equal or approaches maximum initiatively moment; The left and right driving bar connects with a linkage, and it is opposite to make the left and right driving bar remain sense of motion, to guarantee and can quicken continuously bicycle; Adopt the two-stage transmission,, so just can improve the speed of bicycle effectively to obtain the design size of enough raising speed ratio and minimizing sprocket wheel.

The utility model is to increase one-level (can increase more than the secondary as required) driving device on the basis of original bicycle, the restriction drive spindle is swung in ± 30 degree scopes, and increase the linkage of two drive spindles, and increasing the tightening device of messenger chain, integral structure is also uncomplicated; The design's the point of view is to obtain the maximum active moment that overcomes resisting moment with minimum propulsive effort, and keeps initiatively moment continuity in time, can obtain big raising speed ratio like this, thereby improves the kinematic velocity of bicycle.The restriction drive spindle is swung in positive and negative 30 degree scopes when design.Can draw when θ=30 are spent F=M from formula 1 _f/ R.cos30 °=1.15M _f/ R, and when θ=0 is spent the F minimum, F _Min=M _f/ R is from calculating as can be known the F when θ=30 are spent only than F _MinBig by 15%, it is very little to think that drive spindle overcomes the required propulsive effort of resisting moment when swinging in ± 30 degree scopes, the method of swinging in ± 30 degree scopes with the restriction drive spindle guarantees to obtain big active moment with little propulsive effort, linkage with two drive spindles guarantees initiatively moment continuity in time, thereby by the two-stage transmission, obtain suitable raising speed ratio, improve bicycle speed effectively.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 2-Fig. 5 is the constructional drawing according to a kind of bicycle drive system that the utility model proposes.Fig. 2 is a front view, and Fig. 3 is the B-B cutaway view, and Fig. 4 is the A-A cutaway view, and Fig. 5 is that C is to view.

Describe the details of concrete device of the present utility model in detail below in conjunction with Fig. 2-Fig. 5.

This device right pedal (8) is attached on the right drive spindle (10), right drive spindle (10) is fixed on the overriding clutch on the right drive sprocket (11), and rotate around the anchor shaft (12) that is fixed on the bicycle rack together, left foot is pedaled (10) and is attached on the left drive spindle (17), left side drive spindle (17) is connected on the overriding clutch on the left drive sprocket (16), and rotates around fixing (15) that are fixed on the bicycle rack together.Chain (9) links sprocket wheel (11) and sprocket wheel (24), chain (18) links sprocket wheel (21) and sprocket wheel (16), sprocket wheel (21), sprocket wheel (24) and sprocket wheel (22) are fixed on the axle (23), chain (19) links the sprocket wheel (14) of sprocket wheel (22) and band overriding clutch, bicycle adhesion wheel (marking among the figure) then with sprocket wheel (14) on overriding clutch be connected.Chain (29) by track adjusting wheel (26) and track adjusting wheel (27) link respectively left drive spindle (17) in M point, right drive spindle (10) in the N point, guiding wheel seat (25) and (28) on the frame are being supported track adjusting wheel (26) and (27) respectively, C is universal tension wheel structure to view: the axle of quill drive (32) cooperates with sleeve pipe (36), and lock by lock screw (35), support shaft (31) axle head cooperates with the sleeve pipe of quill drive (32), and lock by lock screw (34), axle (33) is connected on the support shaft axle (1), and idler sprocket (30) is gone up at axle (33) and freely rotated.

Its service condition is as follows:

When the directed force F of left foot is pedaled on (20) along directive effect shown in the arrow (37) at left foot, left side drive spindle (17) drives sprocket wheel (16) by overriding clutch and rotates, chain on it (18) drives sprocket wheel (21) and rotates, at this moment, sprocket wheel (22) and sprocket wheel (24) rotate simultaneously, chain (9) driven wheel (11) on the sprocket wheel (24) rotates, because the effect of the overriding clutch on the sprocket wheel (11), drive spindle (10) does not rotate with sprocket wheel (11), when sprocket wheel (22) rotates, chain on it (19) drives sprocket wheel (14) and rotates, the bicycle driving wheel because the overriding clutch on the sprocket wheel (14) is being connected (not marking among the figure), and the bicycle driving wheel is rotated with sprocket wheel (14), travel forward thereby drive bicycle.

When the directed force F of right crus of diaphragm goes up along arrow (37) directive effect in right pedal (8), just the same with above-mentioned situation, be that corresponding right side members is had an effect, applied moment is passed to the bicycle adhesion wheel the most at last, travels forward thereby drive bicycle.

The linkage that Fig. 4 (A-A section-drawing) adopts for this drive system, to guarantee when right drive spindle (10) when moving downward, left side drive spindle (17) upward movement, perhaps when left drive spindle (17) when moving downward, right drive spindle (10) upward movement, the driving work thereby assurance left and right sides pin can hocket incessantly.

Fig. 5 (C is to view) is universal tightening device, is used for tension chain.During adjustment, unclamp earlier and tighten lock screw (34) and (35) after suitable position is adjusted to idler sprocket in tensioning screw (34) and (35), at this moment chain (18) is answered in tension, makes in the motion process chain is not produced impact.Chain (9) and chain (19) all adopt tightening device to carry out tensioning.

By the above, the device of this cover bicycle drive system just can be finished the process of complete driving cycle racing.

Claims

1, unidirectional drive power is sent on the bicycle quick, thereby make the proal a kind of bicycle driving device of bicycle, this device has a sprocket wheel (22) to link to each other with sprocket wheel (14) by chain (19), overriding clutch and bicycle adhesion wheel on the sprocket wheel (14) are connected, and it is characterized in that left drive spindle (17) and right drive spindle (10) are fixed on respectively on the overriding clutch on driving wheel (16) and (11); Adopt the two-stage transmission; Left side drive spindle (17) is connected by linkage with right drive spindle (10); Chain (18), chain (19) and chain (9) are all respectively through a tightening device join dependency sprocket wheel.

2, according to the device shown in the claim 1, left drive spindle (17) and right drive spindle (10) all respectively are subjected to an inhibiting device effect, so that two drive spindles are swung in ° scope of distance horizon ± 30.

3, according to the device shown in the claim 1, it is characterized in that the two-stage transmission, the device of a cover first order transmission is respectively arranged in the bicycle both sides, act on second stage driving device respectively.

4, according to the device shown in the claim 1, it is characterized in that left drive spindle (17) is connected by linkage with right drive spindle (10), this device connects left drive spindle (17) and right drive spindle (10) respectively in M, N point by chain (29) by the track adjusting wheel on the frame (26), (27), makes the direction of rotation of these two drive spindles.