Electric power-assisted system of electric power-assisted bicycle

Abstract

The invention discloses an electric power assisting system of an electric power assisting bicycle, and belongs to the technical field of power assisting bicycles, the electric power assisting system comprises a driving device and a control device, the driving device comprises an electric driving structure and a manual driving structure, the manual driving structure comprises an auxiliary driving assembly and a pedal driving assembly, and the auxiliary driving assembly comprises a clutch assembly; the clutch assembly is connected with the spring assembly which is connected with the second transmission shaft, the second transmission shaft is connected with the second chain wheel through the first ratchet wheel assembly, and the second chain wheel is connected with the fourth chain wheel through the second chain. According to the electric power assisting system of the electric power assisting bicycle, an electric driving mode and a manual driving mode are combined, flexible switching or simultaneous use can be achieved in different riding scenes, and riding convenience and adaptability are improved; the clockwork spring assembly in the auxiliary driving assembly can store energy generated during manual driving, the energy is released when needed, the utilization efficiency of the energy is improved, and the cruising ability of the electric power-assisted bicycle is prolonged to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of assisted bicycles, and more particularly to an electric assist system for an electric assisted bicycle. Background Art

[0002] With the improvement of environmental awareness and the demand for convenient travel, electric assisted bicycles, as a green and economical means of transportation, are becoming more and more popular among people. However, there are some deficiencies in the power systems and controls of existing electric assisted bicycles. For example, some electric assisted bicycles have a single assist mode and cannot be intelligently adjusted according to different road conditions and riding requirements; or they are not efficient enough in energy utilization and have limited endurance. In addition, with the development of intelligent technologies, users also have higher requirements for the intelligence level of electric assisted bicycles and hope to achieve functions such as remote control and real-time monitoring of vehicle status. Therefore, it is of great practical significance to develop a more intelligent, efficient, and reliable electric assist system for electric assisted bicycles, and the above technical solutions are improvements and innovations proposed in response to these problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric assist system for an electric assisted bicycle, which combines two driving methods of electric drive and human power drive, can be flexibly switched or used simultaneously in different riding scenarios, improving the convenience and adaptability of riding; the spring assembly in the auxiliary drive component can store the energy generated during human power drive and release it when needed, improving the energy utilization efficiency and extending the endurance of the electric assisted bicycle to a certain extent.

[0004] To achieve the above purpose, the present invention provides an electric assist system for an electric assisted bicycle, including a driving device and a control device. The driving device includes an electric drive structure and a human power drive structure. The human power drive structure includes an auxiliary drive component and a pedal drive component. The auxiliary drive component includes a clutch component. The clutch component is connected to a spring assembly. The spring assembly is connected to a second transmission shaft. The second transmission shaft is connected to a second sprocket through a first ratchet assembly. The second sprocket is connected to a fourth sprocket through a second chain.

[0005] Preferably, the pedal drive component includes a fourth gear. The fourth gear is connected to a first sprocket through a first transmission shaft. Both the fourth gear and the first sprocket are connected to the first transmission shaft through a first ratchet assembly. The first sprocket is connected to a third sprocket through a first chain. Both ends of the first transmission shaft are connected to one end of a crank. The other end of the crank is provided with a pedal.

[0006] Preferably, the first ratchet assembly includes a first ratchet. The first ratchet is fixedly connected to the fourth gear, the first sprocket, and the second sprocket. The first ratchet is engaged with a first ratchet pawl. The number of first ratchet pawls is three. All three first ratchet pawls are connected to a first sleeve.

[0007] Preferably, the electric drive structure includes a motor, which is connected to a first gear. The first gear meshes with a second gear, which is connected to a third gear. The third gear meshes with a fourth gear, and the third gear is connected to a clutch assembly.

[0008] Preferably, both the third sprocket and the fourth sprocket are connected to the wheel axle through a second ratchet assembly. A speed sensor is installed on the wheel axle. The second ratchet assembly includes a second ratchet, which is fixedly connected to both the third sprocket and the fourth sprocket. The second ratchet engages with a second pawl. The number of the second pawls is three, and all three second pawls are connected to a second sleeve.

[0009] Preferably, the control device includes a control housing. A display is installed on the top of the control housing. Inside the control housing, a gradient sensor, a controller, a signal processor, a signal transmitter, and a signal receiver are installed. The controller is connected to the gradient sensor, the speed sensor, the signal processor, the motor, and the clutch assembly. The signal processor is connected to the signal transmitter and the signal receiver. The signal transmitter and the signal receiver perform signal interaction with the mobile phone client.

[0010] Therefore, by adopting the above electric assist system for an electric assist bicycle, the present invention has the following beneficial effects:

[0011] (1) It combines two driving methods, namely electric drive and human power drive, and can be flexibly switched or used simultaneously in different riding scenarios, improving the convenience and adaptability of riding.

[0012] (2) The spring assembly in the auxiliary drive assembly can store the energy generated during human power drive and release it when needed, improving the energy utilization efficiency and extending the endurance of the electric assist bicycle to a certain extent.

[0013] (3) The various sensors and controllers in the control device can monitor the vehicle status (such as gradient, speed, etc.) in real time and intelligently adjust the assist level according to this information, providing a more comfortable and efficient riding experience.

[0014] (4) The use of the first ratchet assembly and the second ratchet assembly ensures the unidirectionality of power transmission, avoids problems such as power backflow, and improves the reliability and stability of the entire drive system.

[0015] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an electric assist system for an electric assist bicycle according to the present invention;

[0017] Figure 2It is a three-dimensional structural schematic diagram of the electric assist system of an electric assist bicycle according to the present invention;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the pedal drive assembly of the electric assist system of an electric assist bicycle according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of the second sprocket of the electric assist system of an electric assist bicycle according to the present invention;

[0020] Figure 5 It is a structural schematic diagram of the third sprocket of the electric assist system of an electric assist bicycle according to the present invention;

[0021] Figure 6 It is a structural schematic diagram of the fourth gear of the electric assist system of an electric assist bicycle according to the present invention;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the control device of the electric assist system of an electric assist bicycle according to the present invention;

[0023] Figure 8 It is an internal structural schematic diagram of the control device of the electric assist system of an electric assist bicycle according to the present invention.

[0024] Reference numerals

[0025] 1. Motor; 2. First gear; 3. Second gear; 4. Third gear; 5. Fourth gear; 51. First ratchet; 52. First pawl; 53. First sleeve; 6. First sprocket; 7. First transmission shaft; 8. Crank; 9. Pedal; 10. Clutch assembly; 11. Spring assembly; 12. Second transmission shaft; 13. Second sprocket; 14. Third sprocket; 141. Second ratchet; 142. Second pawl; 143. Second sleeve; 15. Fourth sprocket; 16. First chain; 17. Second chain; 18. Axle; 19. Display; 20. Gradient sensor; 21. Controller; 22. Signal processor; 23. Signal transmitter; 24. Signal receiver; 25. Control housing. Detailed implementation manners

[0026] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0027] Unless otherwise defined, the technical terms or scientific terms used in this invention shall have the ordinary meanings as understood by those of ordinary skill in the field to which this invention pertains. The "first", "second" and similar terms used in this invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] Embodiment 1

[0029] As Figures 1 to 8 shown, the present invention provides an electric assist system for an electric assist bicycle, which includes a driving device and a control device. The driving device includes an electric driving structure and a human driving structure. Both the electric driving structure and the human driving structure can provide power for the electric assist bicycle, and can be flexibly switched or used simultaneously in different riding scenarios, improving the convenience and adaptability of riding. The electric driving structure includes a motor 1, which serves as the power source for electric assistance and provides a power output that converts electrical energy into mechanical energy. The motor 1 is connected to a first gear 2, the first gear 2 meshes with a second gear 3, the second gear 3 is connected to a third gear 4, the third gear 4 meshes with a fourth gear 5, and the third gear 4 is connected to a clutch assembly 10. Through the meshing transmission of the first gear 2, the second gear 3, the third gear 4 and the fourth gear 5, the power of the motor 1 is transmitted and the speed and torque are transformed, and the power of the electric driving structure is transmitted to the human driving structure.

[0030] The human driving structure includes an auxiliary driving component and a pedal driving component. The auxiliary driving component includes a clutch assembly 10, and the clutch assembly 10 can control the access or disconnection of the auxiliary driving. The clutch assembly 10 is connected to a spring assembly 11, and the spring assembly 11 can store the energy generated during human driving and release the energy to assist driving when needed, playing a role in energy buffering and assistance. The spring assembly 11 is connected to a second transmission shaft 12, and the second transmission shaft 12 is connected to a second sprocket 13 through a first ratchet assembly. The second transmission shaft 12 transmits the power of the spring assembly 11 to the second sprocket 13, and the first ratchet assembly enables the second sprocket 13 to rotate only in one direction, ensuring the correct direction of power transmission and avoiding problems such as power backflow. The second sprocket 13 is connected to a fourth sprocket 15 through a second chain 17, and the second chain 17 can transmit the power of the auxiliary driving to the wheel axle 18.

[0031] The pedal drive assembly includes a fourth gear 5. The fourth gear 5 is connected to the first sprocket 6 by a first transmission shaft 7. Both the fourth gear 5 and the first sprocket 6 are connected to the first transmission shaft 7 through a first ratchet assembly. The first ratchet assembly ensures that the first sprocket 6 and the fourth gear 5 rotate unidirectionally during human power drive, enabling the power of pedaling to be effectively transmitted to the auxiliary drive assembly and the wheel axle 18. The first sprocket 6 is connected to the third sprocket 14 by a first chain 16. The first chain 16 can transmit the power of the pedal drive assembly to the wheel axle 18. Both ends of the first transmission shaft 7 are connected to one end of a crank 8. A pedal 9 is installed at the other end of the crank 8. The power of the pedal 9 can be transmitted to the first transmission shaft 7 through the crank 8.

[0032] The first ratchet assembly includes a first ratchet 51. The first ratchet 51 is fixedly connected to the fourth gear 5, the first sprocket 6, and the second sprocket 13. The first ratchet 51 is engaged with a first pawl 52. The first pawl 52 can drive the fourth gear 5, the first sprocket 6, and the second sprocket 13 to rotate unidirectionally through the first ratchet 51. The number of the first pawls 52 is three. The three first pawls 52 are all connected to a first sleeve 53. The first sleeve 53 is fixedly connected to the first transmission shaft 7 and the second transmission shaft 12 respectively. The first sleeve 53 can transmit the power of the first transmission shaft 7 and the second transmission shaft 12 to the first pawl 52.

[0033] Both the third sprocket 14 and the fourth sprocket 15 are connected to the wheel axle 18 through a second ratchet assembly. A speed sensor is installed on the wheel axle 18. The speed sensor can detect the rotational speed of the wheel axle 18, thereby obtaining the traveling speed of the electric assist bicycle and providing speed information to the controller 21. The second ratchet assembly includes a second ratchet 141. The second ratchet 141 is fixedly connected to the third sprocket 14 and the fourth sprocket 15 respectively. The second ratchet 141 is engaged with a second pawl 142. The number of the second pawls 142 is three. The three second pawls 142 are all connected to a second sleeve 143. The third sprocket 14 and the fourth sprocket 15 can drive the wheel axle 18 to rotate through the second ratchet 141, the second pawl 142, and the second sleeve 143, thereby driving the wheels on the wheel axle 18 to rotate and driving the electric assist bicycle forward.

[0034] The control device includes a control housing 25 which can protect the internal electronic components and provide installation support. A display 19 is installed on the top of the control housing 25, and the display 19 can display relevant information to the rider, such as speed, battery level, assist mode, etc. Inside the control housing 25, a slope sensor 20, a controller 21, a signal processor 22, a signal transmitter 23 and a signal receiver 24 are installed. The slope sensor 20 can detect the slope where the electric assist bicycle is located and provide slope information for the controller 21 to adjust the assist level. The controller 21 is connected to the slope sensor 20, a speed sensor, the signal processor 22, the motor 1 and the clutch assembly 10. The controller 21 can receive signals from the slope sensor 20, the speed sensor, etc., and control the output power of the motor 1 and the state of the clutch assembly 10 according to preset algorithms and logics to achieve intelligent control of electric assist. The signal processor 22 is connected to the signal transmitter 23 and the signal receiver 24. The signal processor 22 can process signals, including signal amplification, filtering, encoding, etc., so that the signals can be accurately transmitted and interacted. The signal transmitter 23 and the signal receiver 24 perform signal interaction with the mobile phone client and can achieve functions such as remote control and data transmission, such as viewing the vehicle status and setting assist parameters.

[0035] Therefore, the above-mentioned electric assist system for an electric assist bicycle of the present invention combines two methods of electric drive and human drive, which can be flexibly switched or used simultaneously in different riding scenarios, improving the convenience and adaptability of riding; the spring assembly in the auxiliary drive assembly can store the energy generated during human drive and release it when needed, improving the energy utilization efficiency and extending the endurance of the electric assist bicycle to a certain extent.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An electric power-assist system for an electric power-assist bicycle, characterized in that: It includes a driving device and a control device. The driving device includes an electric driving structure and a human-powered driving structure. The human-powered driving structure includes an auxiliary driving component and a pedal driving component. The auxiliary driving component includes a clutch component. The clutch component is connected to a spring component. The spring component is connected to a second transmission shaft. The second transmission shaft is connected to a second sprocket through a first ratchet component. The second sprocket is connected to a fourth sprocket through a second chain.

2. The electric power assist system for an electric power assist bicycle according to claim 1, characterized in that: The pedal drive assembly includes a fourth gear, the fourth gear is connected to the first sprocket through the first transmission shaft, the fourth gear and the first sprocket are both connected to the first transmission shaft through the first ratchet assembly, the first sprocket is connected to the third sprocket through the first chain, both ends of the first transmission shaft are connected to one end of the crank, and a pedal is installed at the other end of the crank.

3. The electric power assist system for an electric power assist bicycle according to claim 2, characterized in that: The first ratchet assembly includes a first ratchet, which is fixedly connected to the fourth gear, the first sprocket and the second sprocket. The first ratchet is engaged with a first pawl. There are three first pawls, and all three first pawls are connected to the first sleeve.

4. The electric power assist system for an electric power assist bicycle according to claim 2, characterized in that: The electric drive structure includes a motor, the motor is connected to a first gear, the first gear is meshed with a second gear, the second gear is connected to a third gear, the third gear is meshed with a fourth gear, and the third gear is connected to a clutch assembly.

5. The electric power assist system for an electric power assist bicycle according to claim 2, characterized in that: The third sprocket and the fourth sprocket are connected to the axle through the second ratchet assembly, and a speed sensor is installed on the axle. The second ratchet assembly includes a second ratchet, and the second ratchet is fixedly connected to the third sprocket and the fourth sprocket. The second ratchet is engaged with the second pawl, and the number of the second pawls is three, and the three second pawls are all connected to the second sleeve.

6. The electric power assist system for an electric power assist bicycle according to claim 5, characterized in that: The control device includes a control shell with a display installed on the top of the control shell. A slope sensor, a controller, a signal processor, a signal transmitter and a signal receiver are installed inside the control shell. The controller is connected to the slope sensor, speed sensor, signal processor, motor and clutch assembly. The signal processor is connected to the signal transmitter and signal receiver. The signal transmitter and signal receiver interact with the mobile phone client through signals.

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