Electric bikes

Abstract

The invention discloses an electric bicycle, comprising a frame, a wheel body, a pedal assembly, a driving assembly, a flywheel and a chain, wherein the wheel body comprises a front wheel body and a rear wheel body, which are respectively arranged at the front end and the rear end of the frame, the pedal assembly comprises a pedal middle axis, a toothed disc arranged coaxially with the pedal middle axis and a pedal connected to the pedal middle axis, the driving assembly is arranged coaxially with the pedal middle axis, located at a side of the pedal middle axis away from the toothed disc, and is used to drive the pedal middle axis to rotate, the flywheel is arranged coaxially with the rear wheel body, and the chain is wound around the toothed disc and the flywheel. It only needs to install the driving assembly at the pedal middle axis, without complicated operations, and reduces the replacement of parts, saving modification costs.

Description

Technical Field

[0001] The invention relates to a bicycle, in particular to an electric bicycle. Background Art

[0002] In the prior art, the modification of a bicycle generally involves installing a motor at the flywheel to drive the rear wheel to rotate and realize the electric control of the bicycle. However, due to the limited space at the rear wheel and the large number of parts such as brakes, the modification of the flywheel is not only cumbersome, but also requires the replacement of many parts, the modification takes a long time and has a high modification cost. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an electric bicycle which only requires the installation of a drive assembly at the center axis of the pedal without complicated operations, reduces the replacement of parts, and saves modification costs.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] An electric bicycle comprises a frame, a wheel body, a pedal assembly, a driving assembly, a flywheel and a chain, wherein the wheel body comprises a front wheel body and a rear wheel body, which are respectively arranged at the front end and the rear end of the frame, the pedal assembly comprises a pedal middle axis, a chainring arranged coaxially with the pedal middle axis and a pedal connected to the pedal middle axis, the driving assembly is arranged coaxially with the pedal middle axis and is located on a side of the pedal middle axis away from the chainring, and is used to drive the pedal middle axis to rotate, the flywheel is arranged coaxially with the rear wheel body, and the chain is wound around the chainring and the flywheel.

[0006] Preferably, the drive assembly includes a motor housing, an end cover, a rotor, a positioning connecting sleeve and a connecting sleeve, the connecting sleeve, the positioning connecting sleeve and the rotor are sequentially sleeved on the pedal center axis in the direction away from the chainring, the motor housing is sleeved outside the rotor and fixed to the pedal on the side away from the chainring, one end of the positioning connecting sleeve is fixedly connected to the rotor, and the other end is fixedly connected to the connecting sleeve, the connecting sleeve is connected to the pedal center axis, the end cover is arranged on the motor housing, and a through hole is arranged in the middle part for the positioning connecting sleeve to pass through.

[0007] Preferably, the cross-section of the positioning connection sleeve is T-shaped, and the end with a larger diameter passes through the through hole to be fixedly connected to the rotor and abuts against the end cover.

[0008] Preferably, the positioning connecting sleeve and the rotor are fixedly connected by bolts or threads.

[0009] Preferably, the positioning connecting sleeve and the connecting sleeve are fixedly connected by bolts or threads.

[0010] Preferably, the connecting sleeve is connected to the pedal center axis via a threaded connection.

[0011] Preferably, the end cover is connected to the motor housing by a snap or thread connection.

[0012] Preferably, the motor housing and the pedal are designed as an integral whole, connected by welding, clamping or sleeve.

[0013] Preferably, the driving assembly further includes a battery and a controller, wherein the battery is fixed on the frame and the controller is arranged on the handlebar of the frame.

[0014] Preferably, it also includes a shelf for placing feet, and the shelf can be folded on the frame through a rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention arranges the drive assembly at the pedal assembly, and the drive assembly can be installed by simply installing it at the pedal center axis, making the modification process of the existing bicycle simpler, greatly reducing the modification time and modification cost, and facilitating promotion and application; in the present invention, through the arrangement of the motor housing, end cover, rotor, positioning connecting sleeve and connecting sleeve, the stability of the rotation of the pedal center axis and the stability of the motor are guaranteed, thereby reducing the influence of the external environment on the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the electric bicycle in the present invention;

[0017] Figure 2 is a cross-sectional view of the pedal assembly in Example 1;

[0018] Figure 3 This is a schematic diagram of the connection structure between the motor housing and the pedal in Example 1;

[0019] Figure 4 is a cross-sectional view of the pedal assembly in Example 2;

[0020] Figure 5 This is a schematic diagram of the connection structure between the motor housing and the pedal in Example 2;

[0021] Figure 6 This is a schematic diagram of the connection structure between the motor housing and the pedal in Example 3;

[0022] Figure 7 This is a schematic diagram of the connection structure between the motor housing and the pedal in Example 4;

[0023] Among them, 1 is the frame, 2 is the wheel body, 3 is the pedal assembly, 31 is the pedal center shaft, 32 is the chain plate, 33 is the pedal, 331 is the clamping sleeve, 4 is the driving assembly, 41 is the motor housing, 411 is the clamping groove, 42 is the end cover, 43 is the rotor, 44 is the positioning connecting sleeve, 45 is the connecting sleeve, 46 is the battery, 47 is the controller, 5 is the flywheel, 6 is the chain, and 7 is the shelf. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figure 1 The present invention includes an electric bicycle, including a frame 1, a wheel body 2, a pedal assembly 3, a driving assembly 4, a flywheel 5 and a chain 6. The wheel body 2 includes a front wheel body and a rear wheel body, which are respectively arranged at the front end and the rear end of the frame 1. The pedal assembly 3 includes a pedal middle shaft 31, a toothed disc 32 coaxially arranged with the pedal middle shaft 31 and a pedal 33 connected to the pedal middle shaft 31. The driving assembly 4 is coaxially arranged with the pedal middle shaft 31, located on a side of the pedal middle shaft 31 away from the toothed disc 32, and is used to drive the pedal middle shaft 31 to rotate. The flywheel 5 is coaxially arranged with the rear wheel body, and the chain 6 is wound around the toothed disc 32 and the flywheel 5. The present invention arranges the driving assembly 4 at the pedal assembly 3, and the driving assembly 4 can be installed by simply installing it at the pedal middle shaft 31, which makes the modification process of the existing bicycle simpler, greatly reduces the modification time and modification cost, and is convenient for popularization and application.

[0026] Example 1

[0027] An electric bicycle comprises a frame 1, a wheel body 2, a pedal assembly 3, a driving assembly 4, a flywheel 5 and a chain 6. The wheel body 2 comprises a front wheel body and a rear wheel body, which are respectively arranged at the front end and the rear end of the frame 1. The pedal assembly 3 comprises a pedal middle shaft 31, a chain plate 32 coaxially arranged with the pedal middle shaft 31 and a pedal 33 connected to the pedal middle shaft 31. The driving assembly 4 is coaxially arranged with the pedal middle shaft 31 and is located on a side of the pedal middle shaft 31 away from the chain plate 32, and is used to drive the pedal middle shaft 31 to rotate. The flywheel 5 is coaxially arranged with the rear wheel body, and the chain 6 is wound around the chain plate 32 and the flywheel 5.

[0028] like Figure 2-3As shown, the drive assembly 4 includes a motor housing 41, an end cover 42, a rotor 43, a positioning connecting sleeve 44 and a connecting sleeve 45. The connecting sleeve 45, the positioning connecting sleeve 44 and the rotor 43 are sequentially sleeved on the pedal central axis 31 in a direction away from the chainring 32. The motor housing 41 is sleeved outside the rotor 43 and fixed to the pedal 33 on the side away from the chainring 32. One end of the positioning connecting sleeve 44 is fixedly connected to the rotor 43, and the other end is fixedly connected to the connecting sleeve 45. The connecting sleeve 45 is connected to the pedal central axis 31. The end cover 42 is arranged on the motor housing 41, and a through hole is arranged in the middle part for the positioning connecting sleeve 44 to pass through. The end cover 42 and the motor housing 41 work together to provide a stable and clean working environment for the rotor 43. A coil is wound around the rotor 43. When in use, the rotor 43 rotates, driving the positioning connecting sleeve 44 to rotate, thereby driving the connecting sleeve 45 to drive the pedal central axis 31 to rotate, thereby realizing the rotation of the chainring 32. In this embodiment, due to the addition of the driving assembly 4, the original pedal center shaft 31 is not long enough, and the pedal center shaft 31 after extension is used to directly replace it.

[0029] Specifically, the cross-section of the positioning connecting sleeve 44 is T-shaped, and the end with a larger diameter passes through the through hole and is fixedly connected to the rotor 43, and abuts against the end cover 42. The positioning connecting sleeve 44 and the rotor 43 are fixedly connected by bolts, that is, corresponding threaded holes are provided on the positioning connecting sleeve 44 and the rotor 43; the positioning connecting sleeve 44 and the connecting sleeve 45 are fixedly connected by bolts, that is, corresponding threaded holes are provided on the positioning connecting sleeve 44 and the connecting sleeve 45; the connecting sleeve 45 and the pedal center axis 31 are connected by threads; the end cover 42 and the motor housing 41 are connected by snaps; the motor housing 41 and the pedal 33 are of an integral molding design, and the connection position of the pedal 33 and the motor housing 41 is located in the middle of the side wall of the motor housing 41 to ensure the balance of the pedals at both ends.

[0030] The driving assembly 4 further includes a battery 46 for supplying power to the motor rotor and a controller 47 for controlling the rotor speed. The battery 46 is fixed on the frame 1 , and the controller 47 is arranged on the handlebar of the frame 1 .

[0031] Specifically, in order to make the rider more comfortable during use, a shelf 7 for placing feet is also included. The shelf 7 can be folded on the frame 1 through a rotating shaft, unfolded when in use, and folded up when not in use, thereby reducing space occupation.

[0032] Example 2

[0033] like Figure 4-5As shown, the difference from Example 1 is that: the AB section is an extended and added section of the pedal center axis, which is connected to the original pedal center axis 31 through the connecting sleeve 45; the positioning connecting sleeve 44 and the rotor 43 are fixedly connected by threads, and the positioning connecting sleeve 44 and the connecting sleeve 45 are fixedly connected by threads. The end cover 42 and the motor housing 41 are connected by threads; the pedal 33 is welded to the side wall of the motor housing 41 and is located in the middle of the side wall; the threaded connection method makes assembly more convenient, the fit of each component is higher, and the precision is guaranteed.

[0034] Example 3

[0035] like Figure 6 As shown, the difference from the above-mentioned embodiments 1 and 2 is that a clamp groove 411 is provided on the motor housing 41 , and the pedal 33 is connected to the motor housing 41 by being fixed in the clamp groove 411 .

[0036] Example 4

[0037] like Figure 7 As shown, different from the above-mentioned embodiments 1-3, one end of the pedal 33 is connected with a sleeve 331, and the pedal 33 is connected to the motor housing 41 by sleeve-fitting the sleeve 331 on the motor housing 41. The sleeve 331 and the motor housing 41 are preferably connected by buckles, threads, bolts, etc.

[0038] The present invention arranges the driving assembly 4 at the pedal assembly 3, and the driving assembly 4 can be installed by simply installing it at the pedal center axis 31, which makes the modification process of the existing bicycle simpler, greatly reduces the modification time and modification cost, and is easy to promote and apply.

[0039] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. An electric bicycle, characterized in that: The bicycle comprises a frame, a wheel body, a pedal assembly, a driving assembly, a flywheel and a chain, wherein the wheel body comprises a front wheel body and a rear wheel body, which are respectively arranged at the front end and the rear end of the frame, the pedal assembly comprises a pedal middle shaft, a chain plate arranged coaxially with the pedal middle shaft and a pedal connected to the pedal middle shaft, the driving assembly is arranged coaxially with the pedal middle shaft, located at a side of the pedal middle shaft away from the chain plate, and is used to drive the pedal middle shaft to rotate, the flywheel is arranged coaxially with the rear wheel body, and the chain is wound around the chain plate and the flywheel; The driving assembly includes a motor housing, an end cover, a rotor, a positioning connection sleeve and a connecting sleeve. The connecting sleeve, the positioning connection sleeve and the rotor are sequentially sleeved on the pedal center axis in a direction away from the chainring. The motor housing is sleeved outside the rotor and fixed to the pedal on the side away from the chainring. One end of the positioning connection sleeve is fixedly connected to the rotor and the other end is fixedly connected to the connecting sleeve. The connecting sleeve is connected to the pedal center axis. The end cover is arranged on the motor housing, and a through hole is arranged in the middle thereof for the positioning connection sleeve to pass through. The motor housing and the pedal are designed as one body, connected by welding, clamping or sleeve.

2. The electric bicycle according to claim 1, characterized in that: The cross section of the positioning connection sleeve is T-shaped, and the end with a larger diameter passes through the through hole and is fixedly connected to the rotor and abuts against the end cover.

3. The electric bicycle according to claim 1, characterized in that: The positioning connection sleeve and the rotor are fixedly connected by bolts or threads.

4. The electric bicycle according to claim 1, characterized in that: The positioning connection sleeve and the connection sleeve are fixedly connected by bolts or threads.

5. The electric bicycle according to claim 1, characterized in that: The connecting sleeve is connected to the pedal center axis via threads.

6. The electric bicycle according to claim 1, characterized in that: The end cover is connected to the motor housing via a snap or thread connection.

7. The electric bicycle according to claim 1, characterized in that: The driving assembly also includes a battery and a controller, wherein the battery is fixed on the frame and the controller is arranged on the handlebar of the frame.

8. The electric bicycle according to any one of claims 1 to 7, characterized in that: The vehicle also comprises a shelf for placing feet, and the shelf can be folded and arranged on the vehicle frame through a rotating shaft.

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