Damping structure of electric power-assisted bicycle

Abstract

The invention discloses a shock absorption structure of an electric power-assisted bicycle, which belongs to the technical field of electric power-assisted bicycles and comprises a front shock absorption device, a rear shock absorption device and a saddle shock absorption device, the front shock absorption device is arranged at a front fork, the rear shock absorption device is arranged at a rear fork, and the saddle shock absorption device is arranged at a saddle. The front damping device, the rear damping device and the saddle damping device are each provided with an energy recovery assembly. According to the electric power-assisted bicycle shock absorption structure, by arranging the front shock absorption device, the rear shock absorption device and the saddle shock absorption device, all-directional shock absorption and buffering of a bicycle are achieved, mechanical energy generated in the shock absorption process is converted into electric energy through the energy recovery assembly, the electric energy is stored, the energy utilization rate is increased, and the energy utilization rate is increased. And additional electric power support can be provided for other electric equipment of the electric power-assisted bicycle.

Description

Technical Field

[0001] The present invention relates to the technical field of electrically assisted bicycles, and more particularly to a shock absorption structure for an electrically assisted bicycle. Background Art

[0002] With the enhancement of people's environmental awareness and the pursuit of convenient travel methods, electrically assisted bicycles, as a green and economical means of transportation, have been favored by more and more people. However, in actual use, the road conditions for electrically assisted bicycles are complex and diverse. Bumpy roads will bring uncomfortable experiences to riders, and at the same time, large vibrations will also damage the vehicle's components and affect the service life of the vehicle.

[0003] Traditional shock absorption structures for electrically assisted bicycles usually only have a simple shock absorption function, mainly absorbing vibration energy through springs or dampers to reduce the impact of vibrations on riders. However, this method only consumes the vibration energy and does not effectively recycle the energy, resulting in a waste of energy.

[0004] In addition, the existing shock absorption structures for electrically assisted bicycles also have certain limitations in terms of shock absorption effect and cannot meet the requirements for shock absorption performance under different road conditions and different riding needs. For example, when encountering large bumps, traditional shock absorption structures may not provide sufficient buffering, causing discomfort to riders; while in the case of slight vibrations, there may be excessive shock absorption, affecting the vehicle's maneuverability. Summary of the Invention

[0005] The purpose of the present invention is to provide a shock absorption structure for an electrically assisted bicycle. By setting up a front shock absorption device, a rear shock absorption device, and a seat shock absorption device, all-round shock absorption and buffering of the vehicle are achieved. And through an energy recovery component, the mechanical energy generated during the shock absorption process is converted into electrical energy and stored, which not only improves the energy utilization rate but also provides additional power support for other electrical devices of the electrically assisted bicycle.

[0006] To achieve the above purpose, the present invention provides a shock absorption structure for an electrically assisted bicycle, including a front shock absorption device, a rear shock absorption device, and a seat shock absorption device. The front shock absorption device is placed at the front fork, the rear shock absorption device is placed at the rear fork, and the seat shock absorption device is placed at the seat. And energy recovery components are installed on the front shock absorption device, the rear shock absorption device, and the seat shock absorption device.

[0007] Preferably, the seat shock absorption device includes a shock absorption frame. A fixed rod is fixed inside the shock absorption frame. A first shock spring and a slider are sleeved on the fixed rod. One end of the first shock spring is fixed on the inner wall of the shock absorption frame, and the other end is fixedly connected to the slider. The slider is cubic in shape.

[0008] Preferably, a connecting rod is hinged to the top end of the slider, the other end of the connecting rod is hinged to the bottom of the seat, a second shock-absorbing spring is fixedly connected to the bottom of the seat, the second shock-absorbing spring is sleeved on the damper, the other end of the second shock-absorbing spring and one end of the damper are both fixed on the shock-absorbing frame, the other end of the damper is fixed to the bottom of the seat, a telescopic protective shell is sleeved outside the second shock-absorbing spring, one end of the telescopic protective shell is fixedly connected to the shock-absorbing frame, and the other end thereof is fixedly connected to the bottom of the seat.

[0009] Preferably, the front fork includes a riser pipe, the riser pipe is connected to two front shock-absorbing devices through fork shoulders, the front shock-absorbing devices include inner pipes and outer pipes, one end of the inner pipe is placed inside the outer pipe, and a sealing ring is provided between the inner pipe and the outer pipe, a third shock-absorbing spring is fixedly connected to the bottom of the inner pipe, and the other end of the third shock-absorbing spring is fixedly connected to the bottom of the outer pipe.

[0010] Preferably, a connecting component is provided between the two outer pipes, the connecting component includes arc-shaped plates, the number of arc-shaped plates is two, and they are respectively fixedly connected to the two outer pipes, the arc-shaped plates are fixedly connected with a connecting plate, a connecting hole is provided on the connecting plate, a connecting threaded rod passes through the connecting hole, and a nut is threadedly connected to the connecting threaded rod.

[0011] Preferably, the rear shock-absorbing device has the same structure as the front shock-absorbing device.

[0012] Preferably, the energy recovery component includes an electromagnetic coil and a permanent magnet, the electromagnetic coil is connected to the circuit board, and the circuit board is connected to the storage battery.

[0013] Preferably, the electromagnetic coil is wound on an insulating skeleton, the insulating skeleton is fixed on the inner wall of the outer pipe, the permanent magnet is arranged at the center of the bottom of the inner pipe and one end of the third shock-absorbing spring, and does not contact the third shock-absorbing spring.

[0014] Preferably, the second shock-absorbing spring is a variable stiffness spring.

[0015] Therefore, by adopting the above-mentioned shock-absorbing structure of an electric-assisted bicycle, the present invention has the following beneficial effects: (1) By providing the front shock-absorbing device, the rear shock-absorbing device and the seat shock-absorbing device, all-round shock absorption and buffering of the vehicle are realized. The third shock-absorbing springs in the front shock-absorbing device and the rear shock-absorbing device can effectively absorb the impact force from the road surface. The first shock-absorbing spring, the second shock-absorbing spring and the damper in the seat shock-absorbing device work together to provide a comfortable riding experience for the rider. In particular, the second shock-absorbing spring in the seat shock-absorbing device is a variable stiffness spring, which can provide different elastic forces according to different vibration intensities, adapt to various road conditions, and greatly improve the riding comfort and stability; (2) The front shock absorber, rear shock absorber, and seat shock absorber are all equipped with energy recovery components. Using the principle of electromagnetic induction, the mechanical energy generated during the shock absorption process is converted into electrical energy and stored in the storage battery. This not only improves the energy utilization rate and reduces energy waste but also provides additional power support for other electrical devices of the electric assist bicycle. (3) The design of the front fork's riser, fork crown, and connection components makes the connection between the front fork and the front shock absorber more stable. The arc plate, connection plate, connection threaded rod, and nut in the connection components enhance the connection strength between the two outer tubes, improve the rigidity and anti-deformation ability of the front fork, and ensure the controllability and safety of the vehicle during driving.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the front fork structure of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention; Figure 2 is a partial cross-sectional view of the front fork of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention; Figure 3 is a schematic diagram of the electromagnetic coil structure of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention; Figure 4 is a side view of the seat shock absorber of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention; Figure 5 is a schematic diagram of the second shock spring structure of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention; Figure 6 is a partial cross-sectional view of the seat shock absorber of an embodiment of the shock absorption structure of an electric assist bicycle according to the present invention.

[0018] Reference Signs 1, inner tube; 2, outer tube; 3, arc plate; 4, connection plate; 5, connection threaded rod; 6, third shock spring; 7, seat; 8, shock absorption frame; 9, fixed rod; 10, first shock spring; 11, second shock spring; 12, slider; 13, telescopic protective shell; 14, electromagnetic coil; 15, insulating skeleton; 16, damper; 17, permanent magnet; 18, connecting rod. Detailed Embodiments

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present 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.

[0021] Embodiment 1 The present invention provides a shock-absorbing structure for an electrically-assisted bicycle, which includes a front shock-absorbing device, a rear shock-absorbing device and a saddle shock-absorbing device. The front shock-absorbing device is disposed at the front fork, the rear shock-absorbing device is disposed at the rear fork, and the saddle shock-absorbing device is disposed at the saddle 7. Moreover, energy recovery components are installed on the front shock-absorbing device, the rear shock-absorbing device and the saddle shock-absorbing device, and the rear shock-absorbing device has the same structure as the front shock-absorbing device.

[0022] The front shock-absorbing device and the rear shock-absorbing device are used to shock-absorb the front wheel and the rear wheel, improving the riding comfort. The energy recovery component is used to convert the mechanical energy during the shock-absorbing process into electrical energy for storage, improving the energy utilization rate and at the same time reducing the impact of vibration on the rider.

[0023] As Figure 4 、 Figure 5 、 Figure 6 shown, the saddle shock-absorbing device includes a shock-absorbing frame 8. The shock-absorbing frame 8 serves as the main frame of the saddle shock-absorbing device, providing an installation foundation and support for other components. A fixing rod 9 is fixed inside the shock-absorbing frame 8. The fixing rod 9 is fixed inside the shock-absorbing frame 8 and is used to sleeved with a first shock-absorbing spring 10 and a slider 12, restricting the movement direction of the slider 12 so that it can only slide on the fixing rod 9. The fixing rod 9 is sleeved with the first shock-absorbing spring 10 and the slider 12. One end of the first shock-absorbing spring 10 is fixed on the inner wall of the shock-absorbing frame 8, and the other end is fixedly connected to the slider 12. When the saddle 7 is subjected to pressure, the first shock-absorbing spring 10 compresses and deforms, absorbing part of the vibration energy and playing a role in preliminary shock absorption. The slider 12 is cubic in shape. The cubic slider 12 can slide on the fixing rod 9. By cooperating with the first shock-absorbing spring 10, the vibration received by the saddle 7 is converted into its own sliding and the elastic deformation of the spring, further buffering the vibration. Moreover, the cubic slider 12 can move straight without rotation.

[0024] The top of the slider 12 is hingedly connected to a connecting rod 18, the other end of which is hinged to the bottom of the seat 7. The two ends of the connecting rod 18 are hinged to the top of the slider 12 and the bottom of the seat 7, respectively, to transmit force between the seat 7 and the slider 12, allowing the slider 12 to move with the vibration of the seat 7 while ensuring the freedom of movement of the seat 7. A second shock-absorbing spring 11 is fixedly connected to the bottom of the seat 7. The second shock-absorbing spring 11 is mounted on a damper 16. This second shock-absorbing spring 11 is a variable-rigidity spring. It can provide different elastic forces under different vibration intensities, adapting to different degrees of vibration, effectively buffering the impact on the seat 7 and improving riding comfort. The other end of the second shock-absorbing spring 11 and one end of the damper 16 are both fixed to the shock-absorbing frame 8. The other end of the damper 16 is fixed to the bottom of the seat 7. The damper 16 dissipates vibration energy, suppressing the vibration amplitude and frequency of the seat 7, allowing the seat 7 to quickly stabilize after shock absorption and avoiding unnecessary shaking. The second shock-absorbing spring 11 is covered with a telescopic protective shell 13, one end of the telescopic protective shell 13 is fixedly connected to the shock-absorbing frame 8, and the other end is fixedly connected to the bottom of the seat 7. The telescopic protective shell 13 is used to protect the second shock-absorbing spring 11 from external dust, moisture, etc., and also prevents the spring from deformation or damage during compression and extension.

[0025] like Figure 1 、 Figure 2 、 Figure 3 As shown, the front fork includes a seat tube, which is connected to two front shock absorbers via a fork crown. The seat tube is the part that connects the front fork to the frame and is used to secure the front fork to the frame and transfer forces between the frame and the front fork. The fork crown is used to connect the seat tube and the two front shock absorbers, and plays the role of fixing and supporting the front shock absorbers, so that the front shock absorbers can be stably installed on the front fork. The front shock absorber includes an inner tube 1 and an outer tube 2. One end of the inner tube 1 is placed inside the outer tube 2, and a sealing ring is provided between the inner tube 1 and the outer tube 2. The sealing ring can be made of a more durable sealing material or structure. The inner tube 1 can move relative to the outer tube 2 to achieve the telescopic action of the shock absorber. The outer tube 2 provides guidance and protection for the movement of the inner tube 1. The sealing ring between the inner tube 1 and the outer tube 2 acts as a seal to prevent impurities such as dust and moisture from entering and affecting the shock absorption performance.

[0026] A third shock-absorbing spring 6 is fixedly connected to the bottom of the inner tube 1. The other end of the third shock-absorbing spring 6 is fixedly connected to the bottom of the outer tube 2, connecting the bottoms of the inner tube 1 and the outer tube 2. When the electric-assisted bicycle encounters bumps, the third shock-absorbing spring 6 elastically deforms, absorbing and cushioning the impact of the road, reducing the transmission of vibration to the frame and improving riding comfort. Bumps are provided on both sides of the bottom end of the inner tube 1 to prevent the inner tube 1 from slipping out of the outer tube 2.

[0027] A connecting component is provided between two outer tubes 2. The connecting component includes arc-shaped plates 3. The number of arc-shaped plates 3 is two, which are respectively fixedly connected to the two outer tubes 2, increasing the connection strength and stability between the two outer tubes 2, enabling the front fork to work coordinately as a whole when subjected to external forces, and improving the rigidity and anti-deformation ability of the front fork. The arc-shaped plate 3 is fixedly connected with a connecting plate 4, which is fixed on the arc-shaped plate 3 and is used to set connection holes, providing an installation position for the connecting threaded rod 5. The connecting plate 4 is provided with connection holes, and the connecting threaded rod 5 penetrates through the connection holes. A nut is threadedly connected to the connecting threaded rod 5, and a lock washer is arranged at the nut to increase anti-loosening measures. The connecting hole threaded rod is used to connect the two arc-shaped plates 3 together, further fastening the connection between the two outer tubes 2, ensuring the stability of the front fork structure, and the connection strength of the front fork can be adjusted by tightening or loosening the nut.

[0028] The energy recovery component includes an electromagnetic coil 14 and a permanent magnet 17. The electromagnetic coil 14 is connected to a circuit board, and the circuit board is connected to a storage battery. A rectification circuit, a filtering circuit, a voltage stabilizing circuit, a control circuit, and a protection circuit are assembled on the circuit board. The storage battery is connected to a horn and a lighting circuit, enabling the storage battery to supply the stored electric energy to the horn and the lighting, reducing the power consumption of the battery of the electric-assisted bicycle.

[0029] The electromagnetic coil 14 is wound around an insulating skeleton 15, and the insulating skeleton 15 is fixed on the inner wall of the outer tube 2. The permanent magnet 17 is arranged at the center of the bottom of the inner tube 1 and one end of the third shock-absorbing spring 6, and does not contact the third shock-absorbing spring 6. When the permanent magnet 17 at the bottom of the inner tube 1 moves, it will cut the electromagnetic coil 14 wound on the insulating skeleton 15 on the inner wall of the outer tube 2, generating an induced current according to the principle of electromagnetic induction. The current is processed by the circuit board and stored in the storage battery, realizing the recovery and utilization of energy, and converting the mechanical energy of vibration into electric energy. The circuit board is controlled by an intelligent energy management system in the prior art, and reasonably controls the recovery and storage of energy according to factors such as the power state of the storage battery and the power consumption requirements of the vehicle, avoiding overcharging or energy waste.

[0030] When using a shock absorption structure for an electric assist bicycle provided by the present invention, taking the energy recovery component of the front shock absorber as an example, when the inner tube 1 moves up and down relative to the outer tube 2, the permanent magnet 17 at the center of the bottom of the inner tube 1 also moves accordingly. Since there is relative movement between the permanent magnet 17 and the electromagnetic coil 14 wound around the insulating skeleton 15 fixed on the inner wall of the outer tube 2, according to the principle of electromagnetic induction, the permanent magnet 17 cuts the electromagnetic coil 14, generating an induced electromotive force in the electromagnetic coil 14, and then generating an induced current. The induced current is processed by a circuit board connected to the electromagnetic coil 14 (such as rectification, filtering, etc.), and then stored in the storage battery. The working principle of the energy recovery component of the rear shock absorber is the same as that of the front shock absorber. Through the relative movement between the permanent magnet 17 and the electromagnetic coil 14 during the shock absorption process, the mechanical energy of the vibration is converted into electrical energy and stored, realizing the recovery and utilization of energy.

[0031] The vertical pipe of the front fork is connected to the frame, transmitting the force from the frame to the front fork. The fork shoulder connects the vertical pipe and the two front shock absorbers, enabling the front shock absorbers to be stably installed on the front fork. When the electric assist bicycle steers or encounters complex road conditions, the two front shock absorbers will receive forces in different directions and magnitudes. At this time, the arc plate 3, connecting plate 4, connecting threaded rod 5 and nut in the connecting component work together to firmly connect the two outer tubes 2 together, enhancing the overall rigidity and stability of the front fork, enabling the front fork to coordinate the work of the two front shock absorbers, and ensuring the controllability and safety of the vehicle during driving.

[0032] When the electric assist bicycle is traveling on an uneven road surface, the impact force received by the wheels is transmitted to the front shock absorber and the rear shock absorber. Taking the front shock absorber as an example, the inner tube 1 will move up and down relative to the outer tube 2. At this time, the third shock spring 6 at the bottom of the inner tube 1 will be compressed or elongated. When receiving an upward impact force, the third shock spring 6 is compressed, converting part of the impact energy into the elastic potential energy of the spring, thereby slowing down the speed and intensity of the vibration transmitted upward to the frame; when the impact force disappears, the third shock spring 6 returns to its original state, releasing the elastic potential energy and making the inner tube 1 return to its initial position. The working principle of the rear shock absorber is the same as that of the front shock absorber. By the deformation of the third shock spring 6, it buffers the vibration received by the rear wheel, ensuring the smoothness of riding.

[0033] During cycling, the saddle 7 will vibrate due to the bumps on the road surface. When the saddle 7 is subjected to a downward pressure, the second shock-absorbing spring 11 and the damper 16 at the bottom of the saddle 7 work together. The second shock-absorbing spring 11, as a variable-stiffness spring, produces different degrees of compressive deformation according to the magnitude of the pressure and absorbs part of the vibration energy. At the same time, the damper 16 consumes the vibration energy through the flow of the damping medium (such as hydraulic oil, etc.) inside it and suppresses the vibration amplitude and frequency of the saddle 7. In addition, the vibration of the saddle 7 is transmitted to the slider 12 through the connecting rod 18, causing the slider 12 to slide on the fixed rod 9, driving the first shock-absorbing spring 10 to compress or extend, and further buffering the vibration. The first shock-absorbing spring 10, the second shock-absorbing spring 11, and the damper 16 work together to provide a multi-level shock-absorbing effect for the saddle 7 and improve the comfort of the rider.

[0034] Therefore, the present invention adopts the above-mentioned shock-absorbing structure for an electric-assisted bicycle. By setting up a front shock-absorbing device, a rear shock-absorbing device, and a saddle shock-absorbing device, it realizes all-round shock absorption and buffering for the vehicle. Moreover, through the energy recovery component, the mechanical energy generated during the shock-absorbing process is converted into electrical energy and stored, which not only improves the utilization rate of energy but also provides additional power support for other electrical equipment of the electric-assisted bicycle.

[0035] 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 assist bicycle shock absorption structure, characterized in that: It includes a front shock absorber, a rear shock absorber and a seat shock absorber. The front shock absorber is placed at the front fork, the rear shock absorber is placed at the rear fork, and the seat shock absorber is placed at the seat. Moreover, energy recovery components are installed on the front shock absorber, the rear shock absorber and the seat shock absorber.

2. The shock absorption structure of an electric assist bicycle according to claim 1, wherein: The seat shock absorber includes a shock absorption frame. A fixed rod is fixed inside the shock absorption frame. A first shock spring and a slider are sleeved on the fixed rod. One end of the first shock spring is fixed on the inner wall of the shock absorption frame, and the other end thereof is fixedly connected with the slider. The slider is cubic.

3. The shock absorption structure of an electrically assisted bicycle according to claim 2, wherein: A connecting rod is hinged to the top end of the slider. The other end of the connecting rod is hinged to the bottom of the seat. A second shock spring is fixedly connected to the bottom of the seat. The second shock spring is sleeved on a damper. The other end of the second shock spring and one end of the damper are both fixed on the shock absorption frame. The other end of the damper is fixed on the bottom of the seat. A telescopic protective shell is sleeved outside the second shock spring. One end of the telescopic protective shell is fixedly connected with the shock absorption frame, and the other end thereof is fixedly connected with the bottom of the seat.

4. The shock absorption structure of an electrically assisted bicycle according to claim 1, characterized in that: The front fork includes a riser tube which is connected to two front shock absorbers through fork shoulders. The front shock absorber includes an inner tube and an outer tube. One end of the inner tube is placed inside the outer tube, and a sealing ring is arranged between the inner tube and the outer tube. A third shock spring is fixedly connected to the bottom of the inner tube, and the other end of the third shock spring is fixedly connected to the bottom of the outer tube.

5. The shock absorption structure of an electrically assisted bicycle according to claim 4, characterized in that: A connecting component is arranged between the two outer tubes. The connecting component includes an arc-shaped plate. The number of the arc-shaped plates is two, and they are respectively fixedly connected with the two outer tubes. The arc-shaped plate is fixedly connected with a connecting plate. A connecting hole is arranged on the connecting plate, and a connecting threaded rod penetrates through the connecting hole. A nut is threadedly connected to the connecting threaded rod.

6. The shock absorption structure of an electric assist bicycle according to claim 1, wherein: The structure of the rear shock absorber is the same as that of the front shock absorber.

7. An electric assist bicycle shock absorption structure according to claim 4, characterized in that: The energy recovery component includes an electromagnetic coil and a permanent magnet. The electromagnetic coil is connected to a circuit board, and the circuit board is connected to a storage battery.

8. The shock absorption structure of an electric assist bicycle according to claim 7, characterized in that: The electromagnetic coil is wound on an insulating skeleton. The insulating skeleton is fixed on the inner wall of the outer tube. The permanent magnet is arranged at the center position of the bottom of the inner tube and one end of the third shock spring, and is not in contact with the third shock spring.

9. The shock absorption structure of an electrically assisted bicycle according to claim 3, wherein: The second shock spring is a variable stiffness spring.

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