CN207072421U

CN207072421U - Multi-speed bicycle

Info

Publication number: CN207072421U
Application number: CN201720969874.7U
Authority: CN
Inventors: 王岳嵩; 齐林; 薛敏杰; 赵昕; 李艳
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2017-08-04
Filing date: 2017-08-04
Publication date: 2018-03-06
Anticipated expiration: 2027-08-04

Abstract

The utility model discloses a kind of multi-speed bicycle, including flywheel, axletree, chain, the pressure sensor, controller, speed change execution unit for trampling for detecting bicycle pressure；Flywheel is arranged on axletree, and the transmission component for driving axletree to rotate is provided between flywheel and axletree, at least two wheel discs to differ in size are additionally provided with flywheel, and wheel disc is provided with the sprocket engaged with chain；Pressure sensor is arranged in transmission component, and pressure sensor and speed change execution unit are connected with controller respectively；Controller sends gear-shift command when the pressure data that pressure sensor detects meets Variable Velocity Condition, to speed change execution unit, and multi-speed bicycle of the present utility model can accurately detect to trample pressure and carry out fluid drive according to pressure is trampled；Pressure sensor etc. is installed concentratedly at flywheel, and parts integrated level is higher, and simple installation.

Description

Speed-changing bicycle

Technical Field

The utility model belongs to the mechanical equipment field especially relates to a variable speed bicycle.

Background

Bicycles, also known as bicycles or bicycles, are typically two-wheeled small land vehicles. After a person rides the vehicle, the person steps on the pedal as power, and the vehicle is a green and environment-friendly vehicle. Can be used as an environment-friendly vehicle for riding instead of walking and going out; more and more people use bicycles as fitness equipment for riding exercise and bicycle travel; the bicycle itself is also a sport event, including road bike racing, mountain bike racing, field bike racing, stunt bike racing, and the like.

With the enhancement of environmental protection and body building awareness, more and more people like riding bicycles, especially bicycles with speed changing function. The bicycle with the speed change function at the present stage is mainly characterized in that a rider manually adjusts a speed changer according to the physical condition of the rider during riding and the riding experience, and selects proper flywheel sprocket so as to achieve a better riding effect. However, the bicycle with the manual transmission adjustment function cannot automatically adjust the transmission according to the physical condition of a rider and riding experience on one hand, and is not intelligent enough; on the other hand, when the bicycle is ridden, the manual adjustment of the transmission can disperse the attention of the rider and influence the riding safety.

In short, the current variable speed bicycle has the technical problems that the speed changer cannot be automatically adjusted, and the riding safety is affected.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a speed-changing bicycle for solving the technical problem that the existing speed-changing bicycle cannot automatically adjust a transmission, which affects riding safety.

An embodiment of the utility model provides a variable speed bicycle, it includes: the bicycle comprises a flywheel, a wheel shaft, a chain, a pressure sensor for detecting the treading pressure of the bicycle, a controller and a speed change executing component; wherein,

the flywheel is arranged on the wheel shaft, a transmission assembly for driving the wheel shaft to rotate is arranged between the flywheel and the wheel shaft, the flywheel is also provided with at least two wheel discs with different sizes, and the wheel discs are provided with sprocket teeth meshed with the chain;

the pressure sensor is installed in the transmission assembly, and the pressure sensor and the variable speed executing component are respectively connected with the controller;

the chain is linked with an execution action output end of the variable speed execution component;

the controller sends a gear shifting command to the gear shifting execution component when the pressure data detected by the pressure sensor meets a gear shifting condition; and the speed change executing part outputs corresponding executing actions according to the speed change instruction so as to drive the chain to be switched between the at least two wheel discs with different sizes.

Further, the transmission assembly includes a ratchet and a pawl;

the ratchet wheel is arranged on the inner side of the flywheel, a plurality of ratchet grooves are formed in the ratchet wheel, at least one pawl matched with the ratchet grooves is arranged on the wheel shaft, and the end part, far away from the wheel shaft, of the pawl is sunk into the ratchet grooves so as to drive the wheel shaft connected with the pawl to rotate when the ratchet wheel integrated with the flywheel rotates;

the pressure sensor is disposed at a position where the pawl and the ratchet groove contact each other.

Further, the pressure sensor is disposed at an end of each of the pawls relatively distant from the wheel axle.

Further, the pressure sensor is arranged in each ratchet groove.

Further, the speed-changing bicycle further comprises: a first tachometer for detecting a rotational speed of the wheel shaft and a second tachometer for detecting a rotational speed of the flywheel;

the first tachometer and the second tachometer are respectively mounted on the wheel axle and the flywheel and are respectively connected with the controller, so that the controller can determine whether the speed change condition is met according to the pressure data detected by the pressure sensor, the first rotating speed detected by the first tachometer and the second rotating speed detected by the second tachometer.

Further, the shift executing means includes: a rotating motor and an actuator; the rotating motor is connected with the controller so as to output clockwise or anticlockwise rotating power according to a control command sent by the controller;

the actuating mechanism is connected with the rotating motor and linked with the chain, and converts the rotating power output by the rotating motor into driving force for driving the chain to move on the at least two wheel discs with different sizes so as to drive the chain to be switched between the at least two wheel discs with different sizes.

Further, the pressure sensor includes any one of a strain gauge pressure sensor, a ceramic pressure sensor, a diffused silicon pressure sensor, a sapphire pressure sensor, and a piezoelectric pressure sensor.

Further, the controller is disposed in a rear upper fork, a rear lower fork or a riser of the bicycle.

Further, the actuating mechanism comprises a speed change line and a guide wheel;

the first end of the speed change line is connected with the output end of the rotating motor, and the second end of the speed change line is connected with the guide wheel;

the guide wheel is provided with a plurality of sprockets and is meshed with the chain;

the length of the speed change line is changed under the driving of the rotation of the rotating motor, and the direction of the guide wheel is driven to change, so that the guide wheel drives the chain to switch between the at least two wheel discs with different sizes;

the variable speed bicycle further comprises:

the manual speed regulator is used for adjusting the length of the speed change line, is arranged on a handlebar of the bicycle and is connected with the first end of the speed change line.

Further, the variable speed bicycle further comprises:

and the wireless transmission module is connected with the controller and the mobile terminal and used for sending the pressure data detected by the pressure sensor, the first rotating speed detected by the first tachometer, the second rotating speed detected by the second tachometer and the wheel disc information meshed with the chain, which are acquired by the controller, to the mobile terminal.

The embodiment of the utility model provides a variable speed bicycle, through increase pressure sensor in the drive assembly between flywheel and axletree, detect the trampling pressure of person of riding, when satisfying the speed change condition according to the pressure data that detect, send the speed change instruction to the speed change executive component, the speed change executive component is according to the corresponding executive action of speed change instruction output to drive the chain and switch between at least two rim plates that differ in size, on the one hand can accurate detection bicycle trampling pressure and realize carrying out automatic speed change according to trampling pressure; on the other hand, the pressure sensor and other parts are intensively arranged at the flywheel of the bicycle, so that the integration level of the parts is high, and the installation is simple and convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a flywheel of a variable speed bicycle provided by an embodiment of the present invention;

fig. 2 is a connection diagram of a part of hardware structure of the speed-variable bicycle according to the embodiment of the present invention.

Detailed Description

The following detailed description will be made with reference to the accompanying drawings and examples, so that how to implement the technical means of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. Furthermore, the terms "coupled" or "electrically connected" are intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The following description is of the preferred embodiment of the present invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the invention. The protection scope of the present invention is subject to the limitations defined by the appended claims.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

Referring to the following drawings, fig. 1 is a schematic structural view of a flywheel of a speed-variable bicycle according to an embodiment of the present invention; fig. 2 is a connection diagram of a part of hardware structure of the speed-variable bicycle according to the embodiment of the present invention.

As shown in fig. 1, the speed-changing bicycle according to the embodiment of the present invention includes a flywheel 10, a chain 20, a pressure sensor 30 for detecting a pedaling pressure of the bicycle, a wheel axle 40, a controller (not shown), and a speed-changing executing component (not shown).

Please refer to fig. 2, which is a connection diagram of a part of hardware structures of a speed-variable bicycle according to an embodiment of the present invention, in which the flywheel 10 is mounted on the wheel axle 40, generally, the flywheel 10 is a circular ring structure sleeved on the wheel axle 40, and at least two wheel discs 110 with different sizes are disposed on the outer side of the flywheel 10, where a plurality of wheel discs 110 with different sizes are disposed on the outer side of the flywheel 10, and a flywheel of a relatively common speed-variable bicycle has 6 or 8 circular wheel discs 110 with different sizes, where the different sizes refer to different diameters of the wheel discs 110, but the centers of the wheel discs 110 are located on the same straight line; a plurality of teeth 120 engaged with the chain 20 are provided on the wheel disc 110; here, the number of the teeth 120 is related to the diameter of the disc 110, and the larger the diameter of the disc 110, the larger the number of the corresponding teeth 120.

The chain 20 is engaged with the sprocket of one of the at least two discs 110, herein referred to as the first disc, where the chain 20 is engaged with the sprocket of one of the plurality of discs 110, herein referred to as the first disc, during normal operation of the bicycle.

A transmission assembly 130 is further disposed between the flywheel 10 and the wheel shaft 40, wherein the transmission assembly 130 is generally mounted inside the flywheel 10 and contacts the wheel shaft 40 for driving the wheel shaft 40 to rotate. Specifically, the movement of the chain 20 can drive the wheel disc 110 to rotate, so as to drive the flywheel 10 to rotate, and the transmission assembly 130 also rotates along with the flywheel 10, so as to drive the wheel axle 40, which is in contact with the transmission assembly 130, to rotate.

The pressure sensor 30 is installed in the transmission assembly 130 for detecting the acting force of the transmission assembly 130 driving the wheel axle 40 to move, and the acting force is the same as the pedaling pressure of the rider; the speed change executing component is mounted on a bicycle frame body close to the flywheel 10, such as a rear upper fork, a rear lower fork or a vertical pipe of the bicycle close to the flywheel 10; the pressure sensor 30, the controller and the variable speed executing component are connected in sequence, that is, the controller is connected to the pressure sensor 30 and the variable speed executing component respectively, where the connection refers to an electrical connection, which may be connected through a physical cable. The speed change executing component is connected with the chain 20 in a contact way, and the speed change executing component can act on the chain 20, namely the chain 20 is linked with an executing action output end of the speed change executing component.

The controller sends a gear shifting command to the gear shifting execution component when the pressure data detected by the pressure sensor 30 meets a gear shifting condition, wherein the pressure sensor 30 is used for detecting the pedaling pressure F of a rider in real time and transmitting the pressure data F to the controller, a first pressure threshold value F1 is arranged on the controller, if the detected pressure data F is greater than the first pressure threshold value F1, the force used by the rider is large, namely the rider needs more effort, the controller is considered to meet the gear shifting condition, and the gear shifting command is sent to the gear shifting execution component at this moment, and the specific gear shifting command is to switch the chain 20 to engage with the sprocket teeth of the large wheel disc 110; after receiving the gear shift command, the gear shift executing component outputs a corresponding executing action according to the gear shift command, where the executing action refers to an action of switching the chain 20 to engage the sprocket of the larger wheel disc 110, that is, driving the chain 20 to switch between the at least two wheel discs with different sizes, specifically, moving from the original first wheel disc to a second wheel disc of the at least two wheel discs with different sizes, where the diameter of the second wheel disc is larger than that of the first wheel disc, and after moving to the second wheel disc, the chain 20 automatically engages with the sprocket on the second wheel disc.

It should be noted that, after the chain 20 is meshed with the sprocket on the second wheel disc, the pressure sensor 30 continues to monitor the pedaling pressure F of the rider, and when the pressure F continues to be greater than the first pressure threshold F1, it indicates that the effort of the rider is still large, i.e., the rider is still taking more effort, and it is considered that the shift condition is still satisfied, and at this time, a shift command is continuously issued to the shift execution member so that the shift execution member drives the chain 20 to move to the wheel disc with a larger diameter and to mesh with the sprocket, and so on until the pedaling pressure F of the rider monitored by the pressure sensor 30 is less than the first pressure threshold F1.

In the embodiment, the pressure sensor is additionally arranged at the contact part of the flywheel and the wheel axle to detect the treading pressure of a bicycle rider, and when the speed change condition is met according to the detected pressure data, the speed change instruction is sent to the speed change execution part so that the speed change execution part outputs corresponding execution action according to the speed change instruction to drive the chain to switch between at least two wheel discs with different sizes, so that on one hand, the treading pressure of the bicycle rider can be accurately detected, automatic speed change is realized according to the treading pressure, the speed changer of the bicycle is not required to be manually controlled, the speed change is more accurate and timely, meanwhile, the attention of the bicycle rider is prevented from being influenced due to manual speed change, and the safe riding is improved; on the other hand, the parts such as the pressure sensor are intensively arranged at the flywheel of the bicycle, so that the integration level of the parts is higher, and the installation is simple and convenient.

In other preferred embodiments of the present invention, the transmission assembly 130 comprises a ratchet 1301 and a pawl 1302;

the ratchet 1301 is disposed on the inner side of the flywheel 10, a plurality of ratchet grooves 1303 are disposed in the ratchet 1301, at least one pawl 1302 matched with the ratchet grooves 1303 is disposed on the wheel shaft 40, and an end portion of the pawl 1302 far away from the wheel shaft 40 is sunk into the ratchet groove 1303, so that the wheel shaft 40 connected with the pawl 1302 is driven to rotate when the ratchet 1301 integrated with the flywheel 10 rotates.

Specifically, the wheel axle 40 is rigidly connected to a wheel, the rotation of the wheel axle 40 drives the wheel to rotate, at least one pawl 1302 is disposed on the surface of the wheel axle 40, generally two pawls 1302 are disposed to ensure that the pawls 1302 have a good engagement with the ratchet 1301, generally two pawls 1302 are disposed at two ends of the same diameter of the wheel axle 40, one end of each pawl 1302 is connected to the surface of the wheel axle 40, a spring is disposed between the other end of each pawl 1302 and the wheel axle 40, and when the pawls 1302 are subjected to a pressure, the pawls 1302 are attached to the wheel axle 40; when the pawl 1302 is not under pressure, the spring will spring up and the pawl 1302 will bulge. The ratchet 1301 is disposed inside the flywheel 10 and rotates synchronously with the flywheel 10, that is, the ratchet 120 can rotate clockwise and counterclockwise around the wheel axle 40 under the driving of the chain 20. When the flywheel 10 rotates counterclockwise, the ratchet wheel 1301 also rotates counterclockwise, and at this time, the ratchet groove 1403 on the ratchet wheel 1301 catches the protruding pawl 1302, that is, the end of the pawl 1302 far away from the wheel axle 40 sinks into the ratchet groove 1403, so that the pawl 1302 rotates, and further the pawl 1302 drives the wheel axle 40 to rotate, that is, the wheel axle 40 connected with the pawl 1302 is driven to rotate when the ratchet wheel 1301 integral with the flywheel 10 rotates, and the rotation of the flywheel 10 and the wheel axle 40 synchronously occurs; when the flywheel 10 rotates clockwise, the ratchet wheel 1301 also rotates clockwise, at this time, the ratchet wheel 1301 presses down the pawl 1302, the pawl 1302 is attached to the surface of the wheel axle 40, the pawl 1302 does not catch the ratchet groove 1403, at this time, the wheel axle 40 is not stressed, that is, the pawl 1302 does not drive the wheel axle 40 to rotate, the rotation of the flywheel 10 does not affect the rotation of the wheel axle 40, and the rotation of the flywheel 10 and the wheel axle 40 is not synchronous.

The pressure sensor 30 is provided at a position where the pawl 1302 and the ratchet groove 1403 are in contact with each other, and when the pawl 1302 and the ratchet 1301 are in contact with each other, the pressure at which they are pressed against each other, that is, the depressing pressure F of the rider can be detected; specifically, in one aspect, the pressure sensor 30 is disposed at an end of each pawl 1302 relatively far from the wheel axle 40, such that when the pawl 1302 is trapped in the ratchet groove 1403, the force against the ratchet 1301 is detected by the pressure sensor 30; in another case, the pressure sensor 30 is disposed in the ratchet groove 1403, and because there are a plurality of ratchet grooves 1403, in practice, considering economic cost, the pressure sensors 30 are disposed at intervals, and the pressure sensors 30 are disposed in three ratchet grooves 1403 of the ratchet wheel 1301, so that when the pawl 1302 falls into the ratchet groove 1403, the force of the ratchet wheel 1301 pressing against the ratchet grooves 1403 is detected by the pressure sensors 30.

Here, the pressure sensor 30 includes any one of a strain gauge pressure sensor, a ceramic pressure sensor, a diffused silicon pressure sensor, a sapphire pressure sensor, and a piezoelectric pressure sensor. In practical application, the corresponding type of pressure sensor can be selected according to practical situations.

In other preferred embodiments of the present invention, the bicycle further comprises a first tachometer 50 and a second tachometer 60, the first tachometer 50 is used for detecting the rotation speed of the wheel axle 40, and the second tachometer 60 is used for detecting the rotation speed of the flywheel 10.

Specifically, the first tachometer 50 and the second tachometer 60 are respectively mounted on the wheel axle 40 and the flywheel 10, and the first tachometer 50 and the second tachometer 60 are respectively connected to the controller for transmitting the rotational speed data of the wheel axle 40 and the rotational speed data of the flywheel 10 to the controller.

The controller determines whether the shifting condition is satisfied based on the received pressure data detected by the pressure sensor, the first rotational speed detected by the first tachometer 50, and the second rotational speed detected by the second tachometer 60. As said, when the pedaling pressure F of the rider is greater than the first pressure threshold F1, i.e. a speed change condition is met, the chain 20 is switched to the large chainwheel 110;

a second pressure threshold F2 is further set, wherein F1 is greater than F2, when the pedaling pressure F of the rider is between F2 and F1, which indicates that the rider exerts moderate force at this time, and no gear shift is required at this time, i.e., the original wheel disc 110 is maintained unchanged, i.e., the gear shift condition is not met at this time;

when the pedaling pressure F is less than F2, the rider exerts less effort, i.e., the rider does not exert much effort, and if the first rotational speed of the wheel axle 40 detected by the first tachometer 50 is the same as the second rotational speed of the flywheel 10 detected by the second tachometer 60, the rider does not exert much effort, so that the gear shifting condition is not satisfied; if the first rotational speed of the wheel axle 40 detected by the first tachometer 50 is greater than the second rotational speed of the flywheel 10 detected by the second tachometer 60, although the rider does not feel hard at this time, the rotational speed of the wheel is greater than the speed of the flywheel, that is, the rider is doing no work at this time and does not convert the pedaling force into the power for the bicycle to go forward, and therefore, the controller needs to switch to the small wheel disc 110 to increase the speed of the flywheel 10, so as to effectively convert the pedaling force of the rider into the power for the bicycle to go forward, that is, the speed change condition is met at this time, the controller sends a speed change instruction to the speed change executing component, and at this time, the speed change instruction is switched to the small wheel disc;

after switching to the small wheel disc, the first tachometer 50 and the second tachometer 60 continue to detect the rotation speeds of the wheel shaft 40 and the flywheel 10, and if the first rotation speed of the wheel shaft 40 detected by the first tachometer 50 continues to be greater than the second rotation speed of the flywheel 10 detected by the second tachometer 60, the controller continues to send a gear shift command to the gear shift executing component, where the gear shift command is to continue to switch to the smaller wheel disc until the first rotation speed of the wheel shaft 40 detected by the first tachometer 50 continues to be equal to the second rotation speed of the flywheel 10 detected by the second tachometer 60, where it is required to point out that the rotation speed of the flywheel 10 is less than or equal to the rotation speed of the wheel shaft 40 during normal operation of the bicycle.

In one embodiment of the present invention, the variable speed actuator includes a rotating electrical machine and an actuator. The rotating motor is connected with the controller to output clockwise or counterclockwise rotating power according to a control instruction sent by the controller, that is, after receiving the control instruction, the rotating motor executes the control instruction to rotate clockwise or counterclockwise, and the control instruction further includes a rotation amplitude of the rotating motor, such as a rotation number of the rotating motor, and the rotation of the rotating motor is to output corresponding rotating power.

The actuating mechanism is connected to the rotating motor and is linked with the chain 20, so as to convert the rotating power output by the rotating motor into a driving force for driving the chain 20 to move on the at least two wheel discs with different sizes, so as to drive the chain 20 to switch between the at least two wheel discs with different sizes, specifically, as described above, the chain 20 is driven to move from the first wheel disc to the second wheel disc and to be engaged with the sprocket on the second wheel disc.

Specifically, the actuator comprises a speed change line and a guide wheel, wherein a first end of the speed change line is connected with an output end of the rotating motor, if the first end of the speed change line is wound on a shaft head of the rotating motor, namely the effective length of the speed change line can be changed by the rotation of the rotating motor, and a second end of the speed change line is connected with the guide wheel; the guide wheel is provided with a plurality of sprockets and meshed with the chain 20, the guide wheel is generally arranged below the wheel disc, the length of the speed change line is changed under the driving of the rotation of the rotating motor, the direction of the guide wheel is driven to change, and the guide wheel drives the chain 20 to move from the first wheel disc to the second wheel disc and be meshed with the sprockets on the second wheel disc.

In other preferred embodiments of the present invention, to avoid the automatic transmission mechanism of the bicycle with variable speed from malfunctioning, a manual speed regulator can be selectively added, and the manual speed regulator can be disposed on the handlebar of the bicycle and connected to the first end of the variable speed cable for adjusting the length of the variable speed cable. As described above, the second end of the shift cable is connected to the guide pulley; the guide wheel is provided with a plurality of sprockets and meshed with the chain 20, the guide wheel is generally arranged below the wheel disc, the length of the speed change line is changed under the adjustment of the manual speed regulator, the direction of the guide wheel is driven to change, and the guide wheel drives the chain 20 to move from the first wheel disc to the second wheel disc and be meshed with the sprockets on the second wheel disc.

Further, the controller is disposed in the rear upper fork, the rear lower fork or the vertical tube of the bicycle, and here, the controller is electrically connected to the pressure sensor 30, the first tachometer 50, the second tachometer 60 and the rotating electrical machine, and in order to improve the overall feeling and save materials of the bicycle, the controller is generally disposed near the rear wheel of the bicycle, as described above, in the rear upper fork, the rear lower fork or the vertical tube of the bicycle, but this does not limit the present invention, and the controller may be disposed in other positions of the bicycle to achieve the same function.

In the above, the first tachometer and the second tachometer are further added to respectively detect the rotating speed of the bicycle wheel shaft and the rotating speed of the flywheel, related rotating speed data is transmitted to the controller, and when the rotating speed of the bicycle wheel shaft is greater than the rotating speed of the flywheel, a speed change instruction is timely sent to the speed change execution part, so that the chain is meshed with the small wheel disc, the rotating speed of the flywheel is increased, the waste of strength of a rider is avoided, and the user experience is improved; in addition, a manual speed regulator is added on a handlebar of the bicycle, and when the automatic speed change mechanism of the bicycle breaks down, a rider can change the speed by using the manual speed regulator, so that the user experience is further improved.

In addition, in other preferred embodiments of the present invention, a wireless transmission module (not shown in the drawings) may be optionally added, the wireless transmission module is connected to the controller and the mobile terminal, where the mobile terminal includes, but is not limited to, a smart phone, a tablet computer, etc., and the wireless transmission module is configured to transmit the pressure data detected by the pressure sensor, the first rotation speed detected by the first tachometer 50, the second rotation speed detected by the second tachometer 60, and the information of the wheel disc 110 engaged with the chain 20, which are acquired by the controller, to the mobile terminal. After the mobile terminal obtains the data, on one hand, a user can send a control instruction to the controller according to the related data, so that the controller sends a corresponding speed change instruction according to the control instruction, and the speed change execution component outputs a corresponding execution action according to the speed change instruction after receiving the speed change instruction, so as to drive the chain 20 to switch between the at least two wheel discs with different sizes, namely, speed change is realized through the mobile terminal; on the other hand, a user can input parameters of the controller through the mobile terminal according to the actual situation of the user, such as the first pressure threshold F1, the second pressure threshold F2 and the like, so that the parameter setting of the controller is realized, the interactive experience of the variable speed bicycle and the intelligent terminal is improved, the variable speed bicycle is more intelligent, and the user experience is further improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A variable speed bicycle, comprising: the bicycle comprises a flywheel, a wheel shaft, a chain, a pressure sensor for detecting the treading pressure of the bicycle, a controller and a speed change executing component; wherein,

2. The variable speed bicycle of claim 1, wherein the transmission assembly includes a ratchet and a pawl;

3. The variable speed bicycle of claim 2, wherein the pressure sensor is disposed at an end of each pawl opposite the wheel axle.

4. The variable speed bicycle of claim 2, wherein the pressure sensor is disposed in each ratchet groove.

5. The variable speed bicycle of claim 2, further comprising: a first tachometer for detecting a rotational speed of the wheel shaft and a second tachometer for detecting a rotational speed of the flywheel;

6. The variable speed bicycle of any one of claims 1 to 5, wherein the shift performing member comprises: a rotating motor and an actuator; the rotating motor is connected with the controller so as to output clockwise or anticlockwise rotating power according to a control command sent by the controller;

7. The variable speed bicycle of any one of claims 1-5, wherein the pressure sensor comprises any one of a strain gauge pressure sensor, a ceramic pressure sensor, a diffused silicon pressure sensor, a sapphire pressure sensor, and a piezoelectric pressure sensor.

8. The gearshift bicycle of any of claims 1 to 5, wherein the controller is disposed within a seat stay, or riser of the bicycle.

9. The variable speed bicycle of claim 6, wherein the actuator comprises a shift wire and a guide wheel;

the variable speed bicycle further comprises:

10. The variable speed bicycle of claim 5, further comprising: