CN216887104U

CN216887104U - Forward and backward treading high and low speed bicycle device

Info

Publication number: CN216887104U
Application number: CN202220651694.5U
Authority: CN
Inventors: 李祥发
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-05
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a forward and backward treading high and low speed bicycle device, wherein the middle end of a bicycle is respectively provided with a driving shaft and a driven shaft, a main chain wheel is fixed on the driving shaft, a main flywheel is coaxially fixed on the main chain wheel, a driven chain wheel is fixed on the driven shaft, a driven flywheel is coaxially fixed on the driven chain wheel, and the main chain wheel is connected with the driven chain wheel through an inner chain; the bicycle is characterized by also comprising a rear shaft arranged at the rear end of the bicycle body, wherein a rear chain wheel is fixed on the rear shaft, and the main flywheel is connected with the auxiliary flywheel, the tension chain wheel and the rear chain wheel through an outer chain; the bicycle device has two riding modes of forward treading and backward treading, is suitable for riding on a flat road at a high speed when the forward treading is performed, saves labor at a low speed when the backward treading is performed, and is suitable for climbing uphill; the fatigue caused by unidirectional muscle movement can be relieved by stepping in the clockwise direction and the anticlockwise direction, and the main flywheel and the auxiliary flywheel are locked by the ratchet wheel pawls and cannot rotate reversely, so that the main flywheel and the auxiliary flywheel cannot slide down a slope when ascending.

Description

Forward and backward treading high and low speed bicycle device

Technical Field

The utility model relates to a bicycle device, in particular to a forward and backward pedaling high and low speed bicycle device.

Background

Bicycles, also known as bicycles or bicycles, are generally two-wheeled small land vehicles that are powered by pedaling after a person rides the bicycle, and are complex machines consisting of many simple machines.

The common bicycle flywheel only can play a transmission role and can not change speed, different transmission ratios are required to adapt to the change of the road surface on a complex road surface, such as a road surface with frequent alternation of ascending and descending roads and a smooth road, and a speed change device is required to be added for realizing the speed change of the bicycle, the common speed change device has a complex structure and must be rigorous in operation, so that a common person cannot easily get on the hand.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention is directed to a bicycle device that is simple to operate and capable of stepping forward and backward and changing speed.

In order to realize the technical purpose, the scheme of the utility model is as follows: a forward and backward pedaling high and low speed bicycle device comprises a bicycle body, wherein a driving shaft and a driven shaft are mounted at the middle end of the bicycle body, a main chain wheel is fixed on the driving shaft, a main flywheel is coaxially fixed on the main chain wheel, a driven chain wheel is fixed on the driven shaft, a driven flywheel is coaxially fixed on the driven chain wheel, and the main chain wheel is connected with the driven chain wheel through an inner chain;

the bicycle is characterized by further comprising a rear shaft arranged at the rear end of the bicycle body, a rear chain wheel is fixed on the rear shaft, the main flywheel is connected with the auxiliary flywheel and the rear chain wheel through outer chains, the main flywheel drives the rear chain wheel to transmit clockwise through the outer chains, and the main flywheel drives the auxiliary flywheel to transmit reversely through the outer chains;

the left crank and the right crank are symmetrically arranged on two sides of the driving shaft, and when the right crank rotates clockwise, the main flywheel drives the rear chain wheel to transmit clockwise through the outer chain; when the right crank rotates reversely, the driving shaft is transmitted to the main chain wheel, the main chain wheel drives the driven chain wheel to perform anticlockwise transmission through the inner chain so as to drive the driven flywheel to perform anticlockwise rotation, and the driven flywheel drives the rear chain wheel to perform clockwise transmission through the outer chain.

Preferably, a main wheel core is arranged on the driving shaft, the main flywheel further comprises a main flying ratchet wheel protruding out of the gear surface of the main flywheel, a clockwise main flying pawl with a return spring is arranged on the main wheel core, and the main flying pawl is matched with the main flying ratchet wheel to enable the main flying ratchet wheel to drive clockwise in a one-way mode; the driven shaft is provided with a driven wheel core, the driven flywheel further comprises a driven flying ratchet wheel protruding out of the gear surface of the driven flywheel, a driven flying pawl with a return spring in the anticlockwise direction is arranged on the driven wheel core, and the driven flying pawl is matched with the driven flying ratchet wheel to enable the driven flying ratchet wheel to perform anticlockwise one-way transmission.

Preferably, a tension sprocket is connected between the driven flywheel and the rear sprocket through an outer chain transmission, and the tension sprocket is connected to the bicycle body through a tension spring.

Preferably, the number of teeth of the main sprocket is greater than the number of teeth of the main flywheel.

Preferably, the number of teeth of the main chain wheel is greater than that of the auxiliary chain wheel, and the number of teeth of the auxiliary chain wheel is greater than that of the auxiliary flywheel.

The utility model has the beneficial effects that: the bicycle device has two riding modes of forward stepping and backward stepping, is suitable for riding on a flat road at a high speed when forward stepping and is labor-saving at a low speed when backward stepping and is suitable for climbing uphill according to the change of the transmission ratio among the teeth; the fatigue feeling caused by unidirectional muscle movement can be relieved by stepping in the clockwise direction and the anticlockwise direction, and the main flywheel and the auxiliary flywheel are locked by the ratchet wheel and the pawl and cannot rotate reversely, so that the sliding slope cannot be caused when the main flywheel and the auxiliary flywheel ascend a slope; the bicycle device of this application reasonable in design had both been fit for body-building and has been trampled in the same direction as anti-, trampled the convenience simultaneously, was fit for using widely.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic representation of a step-down transmission of the present invention;

FIG. 4 is a schematic view of a step-down transmission of the present invention;

FIG. 5 is a partial enlarged view of the first embodiment of the present invention;

fig. 6 is a second partial enlarged view of the present invention.

In the figure: 1. a drive shaft; 2. a driven shaft; 3. a main sprocket; 4. a main flywheel; 5. a slave sprocket; 6. a slave flywheel; 7. an inner chain; 8. an outer chain; 9. a primary fly pawl; 10. a main fly ratchet wheel; 11. a tension sprocket; 12. a tension spring; 13. a rear sprocket; 14. a rear axle; 15. a flower drum; 16. a bead retainer bearing; 17. a main wheel core; 18. a slave wheel core; 19. a left crank; 20. a right crank; 21. a secondary fly pawl; 22. a slave fly ratchet; 23. a bicycle main body; 24. a rear disc brake; 25. and (4) threading.

Detailed Description

The utility model is described in further detail below with reference to the figures and specific embodiments. In order to clearly and completely describe the technical scheme, the following embodiments are selected for illustration; the following examples are part of the present invention; other embodiments, which can be obtained without inventive step based on the present application, are within the scope of the present invention.

In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top/bottom", and the like are all based on the orientations and positional relationships shown in the drawings, and are only for the convenience of clearly describing the embodiments, but do not indicate or imply that the referred devices or elements have to have specific orientations, and therefore, the present application is not limited thereto. Meanwhile, the terms "first" and "second" in the embodiments are used only for distinguishing the descriptive purposes and are not intended to indicate or imply relative importance.

As shown in fig. 1-6, the embodiment of the present invention is a clockwise and counterclockwise pedaling high and low speed bicycle device, which comprises a bicycle main body 23, a driving shaft 1, a driven shaft 2, a main chain wheel 3 fixed on the driving shaft 1, a driven chain wheel 5 fixed on the driven shaft, a main flywheel 4, a driven flywheel 6, a rear chain wheel 13, an inner chain 7 and an outer chain 8, wherein a left crank 19 and a right crank 20 are symmetrically arranged on the left and right sides of the driving shaft 1, pedals are arranged on the left and right cranks, a hub 15 is arranged on the outer ring of the rear shaft 14, a rear disc brake 24 is sleeved on the hub 15, and a bead retaining bearing 16 is arranged between the rear chain wheel 13 and the rear shaft 14.

As shown in fig. 3-4, the right crank 20 is used as a reference, the forward stepping mode is a high-speed mode suitable for a flat road, the backward stepping mode is a low-speed labor-saving mode suitable for an uphill slope, and when the right crank 20 is stepped forward, the main flywheel 4 drives the rear chain wheel 13 to transmit clockwise through the outer chain 8; when the right crank 20 is stepped on reversely, the driving shaft 1 is transmitted to the main chain wheel 4, the main chain wheel 4 drives the driven chain wheel 5 to perform anticlockwise transmission through the inner chain 7 so as to drive the driven flywheel 6 to rotate anticlockwise, and the driven flywheel 6 drives the rear chain wheel 13 to perform clockwise transmission through the outer chain 8.

Referring to fig. 1-2, a driving shaft 1 and a driven shaft 2 are mounted at the middle end of a bicycle body, a main chain wheel 3 is fixed on the driving shaft 1, a main flywheel 4 is coaxially fixed on the main chain wheel 3, a thread 25 in the anticlockwise direction is arranged on the driving shaft 1, and the driving shaft 1 is screwed in and connected with the main flywheel 4 through the thread 25; a driven shaft 2 is fixed with a driven chain wheel 5, a driven flywheel 6 is coaxially fixed on the driven chain wheel 5, a clockwise thread 25 is arranged on the driven shaft 2, the driven shaft is screwed in and connected with the driven flywheel 6 through the thread 25, and a main chain wheel 3 is connected with the driven chain wheel 5 through an inner chain 7;

the rear axle 14 is arranged at the rear end of the bicycle body, a rear chain wheel 13 is fixed on the rear axle 14, and the main flywheel 4 is connected with the auxiliary flywheel 6, the tension chain wheel 11 and the rear chain wheel 13 through an outer chain 8.

As shown in fig. 3, when the right crank 20 rotates clockwise, the right crank is transmitted to the main flywheel 4 through the driving shaft 1, the main flywheel 4 drives the outer chain 8 to rotate clockwise to the rear sprocket 13, the slave flywheel 6 further comprises a slave fly ratchet wheel 22 protruding from the gear face of the slave flywheel 6, the slave fly ratchet wheel 22 is provided with sawteeth, the slave fly ratchet wheel 21 is provided with a return spring, the slave fly ratchet wheel 22 on the slave flywheel 6 is matched with the slave fly ratchet wheel 21 in the counterclockwise direction, the slave flywheel 6 idles due to the rotation of the slave fly ratchet wheel 21 along the slave fly ratchet wheel 22, namely, the driving shaft 1, the main flywheel 4, the main sprocket 4 and the driven shaft 2 rotate clockwise when stepping on, the slave sprocket 5 all rotates clockwise, and only the slave fly ratchet wheel 22 is driven to rotate counterclockwise by the outer chain 8.

As shown in fig. 4, when the right crank 20 rotates counterclockwise, the driving shaft 1 drives the main sprocket 3, the main sprocket 3 drives the inner chain 7 to rotate counterclockwise, the driven shaft 2 drives the driven sprocket 5 to the driven flywheel 6, and the outer chain 8 drives the rear sprocket 13 to rotate clockwise. The main flywheel 4 further comprises a main flying ratchet wheel 10 protruding out of the gear face of the main flywheel 4, sawteeth are arranged on the main flying ratchet wheel 10, a return spring is arranged on a main flying pawl 9, the main flying ratchet wheel 10 on the main flywheel 4 is matched with the main flying pawl 9 in the clockwise direction, the main flywheel 4 idles along the main flying ratchet wheel 10 due to the main flying pawl 9, namely, the driving shaft 1 and the driven shaft 2 rotate in the reverse stepping mode, the main sprocket wheel 4, the driven sprocket wheel 5 and the driven flywheel 6 all rotate anticlockwise, and only the main flying ratchet wheel 10 is driven by the outer chain 8 to rotate clockwise.

Because the inner chain 7 is connected with the main chain wheel 3 and the driven chain wheel 5, no matter which direction the crank rotates, the crank, the main chain wheel 3 and the driven chain wheel 5 always keep rotating in the same direction, the outer chain 8 is connected with the main flywheel 4, the driven flywheel 6, the rear chain wheel 13 and the tension chain wheel 11, because the outer chain 8 is respectively connected with the main flywheel 4 and the driven flywheel 6 in a positive and negative mode to rotate, the rotating direction of the main flywheel 4 is opposite to that of the driven flywheel 6, the rotating direction of the rear chain wheel 13 is opposite to that of the driven flywheel 6, the main flywheel 4 drives the rear chain wheel 13 to transmit in the same direction through the outer chain 8, and the main flywheel 4 drives the driven flywheel 6 to transmit in the reverse direction through the outer chain 8. Therefore, when the main flywheel 4 (or the auxiliary flywheel 6) is connected with the outer chain 8 in clockwise rotation, the rear chain wheel 13 is always driven to rotate clockwise in the same direction, wherein the tension chain wheel 11 is used as an auxiliary component and is slightly stressed, and the tension chain wheel 11 is connected to the bicycle body through the tension spring 12.

In order to make the bicycle device possess the variable speed function, each tooth number of this application is different, and the tooth number of main sprocket 3 is greater than the tooth number of main flywheel 4. The number of teeth of the main chain wheel 3 is larger than that of the auxiliary chain wheel 5, and the number of teeth of the auxiliary chain wheel 5 is larger than that of the auxiliary flywheel 6. In the embodiment of the present application, when the user steps on the high-speed transmission, the number of teeth of the main flywheel 4 is 22, and when the right crank 20 rotates one turn clockwise, the gear of the main flywheel 4 is directly transmitted to the rear sprocket 13 through the outer chain 8 at the speed of 22 teeth/turn; when trampling low speed transmission in opposite directions, 3 tooth counts of main sprocket are 23, 5 tooth counts of follow sprocket are 16, 6 tooth counts of follow flywheel are 10, when right crank 20 rotates the round with the anticlockwise, main sprocket 3 passes through inner chain 7 transmission to follow sprocket 5, follow sprocket 5 through driven shaft 2 transmission to follow

flywheel

6, 3 tooth counts of main sprocket 23 divide by 5 tooth counts of follow sprocket 16, equal to the ratio of the main sprocket 3 and the 5 turns of follow sprocket, the ratio multiplies again from 6 tooth counts of flywheel 10, just be from the rotational speed ratio of 6 pivoted of flywheel (23/16 is 1.4375 tooth counts/circle).

The ratio of this application high low speed can be according to the concrete needs confirm the number of teeth of two flywheels, two sprockets and design, and above concrete number of teeth is for the convenience of calculating the physical parameter of variable speed and demonstrates, and is not only specific number of teeth, as long as the application according to design differential ratio number of teeth design, all within the protection scope of this application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a step on high low-speed bicycle device in same direction as turning over, includes the bicycle body, its characterized in that: a driving shaft and a driven shaft are mounted at the middle end of the bicycle body, a main chain wheel is fixed on the driving shaft, a main flywheel is coaxially fixed on the main chain wheel, a driven chain wheel is fixed on the driven shaft, a driven flywheel is coaxially fixed on the driven chain wheel, and the main chain wheel is connected with the driven chain wheel through an inner chain;

2. The apparatus according to claim 1, wherein: the main flywheel is provided with a main flywheel core, the main flywheel further comprises a main flying ratchet wheel protruding out of the gear surface of the main flywheel, a clockwise main flying pawl with a reset spring is arranged on the main flywheel core, and the main flying pawl is matched with the main flying ratchet wheel to enable the main flying ratchet wheel to drive clockwise in a one-way mode; the driven shaft is provided with a driven wheel core, the driven flywheel further comprises a driven flying ratchet wheel protruding out of the gear surface of the driven flywheel, a driven flying pawl with a return spring in the anticlockwise direction is arranged on the driven wheel core, and the driven flying pawl is matched with the driven flying ratchet wheel to enable the driven flying ratchet wheel to perform anticlockwise one-way transmission.

3. The apparatus according to claim 2, wherein: and a tension chain wheel is connected between the driven flywheel and the rear chain wheel through an outer chain in a transmission way, and the tension chain wheel is connected to the bicycle body through a tension spring.

4. The apparatus according to claim 2, wherein: the number of teeth of the main chain wheel is greater than that of the main flywheel.

5. The apparatus according to claim 2, wherein: the number of teeth of main sprocket is greater than the number of teeth of follow sprocket, the number of teeth of follow sprocket is greater than the number of teeth of following the flywheel.