Four-wheel power-assisted bicycle

Abstract

The utility model discloses a four-wheel power-assisted bicycle which comprises a main bicycle frame, a front wheel damping driving assembly and a rear wheel damping driving assembly, the front wheel damping driving assembly is installed on the front portion of the main bicycle frame, and the rear wheel damping driving assembly is installed inside the rear portion of the main bicycle frame. The front wheel damping driving assembly comprises a front shaft, damping parts and a driving part, the driving part is installed in the middle of the front shaft, the damping parts are arranged on the two sides of the driving part, the two ends of the front shaft are connected with front wheel bodies, a seat is arranged above the main frame, a battery is installed below the seat, and the front wheel bodies are connected with the front wheel bodies. The front wheel body and the front wheel damping driving assembly on the two sides of the device are independently connected and adopt the independent suspension, the rear wheel body and the rear wheel damping driving assembly are coaxially arranged and adopt the semi-independent suspension, and therefore the device has the advantages of being good in damping effect, good in anti-roll performance, low in mass center, high in comfort level, convenient to install and maintain and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of power-assisted bicycle equipment, and in particular relates to a four-wheel power-assisted bicycle. Background Art

[0002] Power-assisted bicycles, also known as electric-assisted bicycles, are a form of personal transportation that combines the lightweight convenience of a traditional bicycle with the assisted power of an electric motor. Suitable for a variety of situations, these bicycles utilize an electric motor to assist the rider, making riding easier and more effortless while maintaining the traditional cycling experience.

[0003] The four-wheeled power-assisted bicycles currently common on the market use a fixed rear axle method similar to the rear wheels of two-wheeled bicycles, that is, the rear axle is directly connected to the frame. Although this method is convenient for arranging and installing the chain, when riding, when the ground is uneven, there is no other buffering means except the buffering of the tires. The force is directly transmitted to the passengers through the frame, which reduces the comfort. Utility Model Content

[0004] The purpose of the present utility model is to provide a four-wheel power-assisted bicycle to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A four-wheel power-assisted bicycle comprises a main frame, a front-wheel shock-absorbing drive assembly and a rear-wheel shock-absorbing drive assembly, wherein the front-wheel shock-absorbing drive assembly is mounted on the front of the main frame, and the rear-wheel shock-absorbing drive assembly is mounted on the rear of the main frame, the front-wheel shock-absorbing drive assembly comprises a front axle, a shock-absorbing part and a drive part, the drive part is mounted on the middle of the front axle, shock-absorbing parts are provided on both sides of the drive part, both ends of the front axle are connected to front wheel bodies, and the two front wheel bodies are respectively connected to the front axle through the shock-absorbing parts, a seat is provided above the main frame, a battery is installed below the seat, and rear wheel bodies are installed on both sides of the rear-wheel shock-absorbing drive assembly.

[0007] By adopting the above technical solution: when in use, the cooperation of the front wheel shock absorption drive assembly and the rear wheel shock absorption drive assembly can fully reduce shock during the movement of the vehicle, thereby improving the comfort of the vehicle. In addition, the battery installed on the rear side can cooperate to supply energy to the front wheel shock absorption drive assembly and the rear wheel shock absorption drive assembly, and perform shock absorption through the rear wheel shock absorption drive assembly.

[0008] Preferably, the driving part includes a transmission chain, a first differential, a front wheel drive shaft and a first driving motor, the first driving motor is connected to the first differential through the transmission chain, the first differential is connected to the front wheel drive shaft, and both ends of the drive shaft are connected to the front wheel body through the shock absorbing part.

[0009] By adopting the above technical solution: driven by the first drive motor, the transmission chain rotates, and at the same time drives the first differential and the front wheel drive shaft to rotate synchronously, thereby driving the front wheel body to rotate, and the front wheel and frame adopt independent suspension, thereby ensuring independent movement between the two wheels.

[0010] Preferably, the rear wheel shock absorption drive assembly includes a rear axle, a second differential, a shock absorbing part and a second drive motor. The second differential is installed in the middle of the rear axle, and a pedal is installed at the bottom of the main frame. The pedal and the output end of the second drive motor are connected to the second differential through a chain secondary transmission. Both ends of the rear axle are connected to the rear wheel body through a full-floating hub, and the rear wheel body is coaxially arranged with the rear axle.

[0011] By adopting the above technical solution: using a second drive motor or pedals to drive the rear wheel in a dual-axis manner, or using an undriven rear axle, a variety of drive modes are available, which is convenient for customers to use, and the coaxially arranged rear wheel body and the rear axle are connected by a semi-independent suspension.

[0012] Preferably, the middle part of the front wheel body and the rear wheel body is a full-floating hub, a universal joint is installed inside the full-floating hub, the upper part of the full-floating hub is connected to the shock absorber, and the lower part is connected to the main frame through a suspension link, and a half shaft is provided in the middle part of the full-floating hub, and the half shaft is transmitted from the middle of the universal joint to be connected to the front axle or the rear axle.

[0013] By adopting the above technical solution, the front wheel body and the rear wheel body adopting the suspension structure not only facilitate the maintenance of the transmission shaft, but also facilitate the disassembly and assembly of the front wheel body and the rear wheel body.

[0014] Preferably, a shelf is installed on the front side of the main frame.

[0015] By adopting the above technical solution: the front axle's cargo shelf has a large loading space and a low center of gravity, which is not only convenient for storage, but also has high stability and comfort and is not prone to bumps.

[0016] Preferably, a quick-release handlebar is detachably mounted on the front portion of the main frame.

[0017] By adopting the above technical solution: the quick-disassembly vehicle is not only convenient to install, but also easy to install and carry, and convenient to carry and transport the vehicle.

[0018] The technical effects and advantages of this utility model are:

[0019] 1. This device, through the interaction between the front wheel shock absorption drive assembly and the rear wheel shock absorption drive assembly, can fully reduce shock during vehicle movement, improving user comfort. It also provides a dual-drive setting by driving the rear wheel with a battery and the front or rear wheel with pedals, thus increasing the driver's range of options.

[0020] 2. The fully floating wheel hub connected by a universal joint and axle shaft not only facilitates the maintenance of the drive shaft, but also facilitates the disassembly and assembly of the front and rear wheel bodies;

[0021] 3. The shelves in front of the main workshop have a low center of mass and a large load capacity, which not only improves space utilization, but also further improves the stability and comfort of the vehicle during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the front wheel shock-absorbing drive assembly of the present invention;

[0024] Figure 3 It is a rear view of the present invention.

[0025] In the figure: 1. Main frame; 11. Foot pedals; 2. Front wheel shock absorption drive assembly; 21. Front axle; 22. Shock absorption unit; 221. Shock absorber; 222. Shock absorption spring; 23. Drive unit; 231. Drive chain; 232. First differential; 233. Front wheel drive shaft; 234. First drive motor; 3. Rear wheel shock absorption drive assembly; 31. Rear axle; 32. Second differential; 33. Second drive motor; 4. Front wheel body; 5. Seat; 6. Battery; 7. Cargo rack; 8. Quick-release handlebar; 9. Rear wheel body; 10. Full-floating wheel hub; 101. Universal joint; 102. Suspension link; 103. Axle. DETAILED DESCRIPTION

[0026] The following is a combination of the appended examples of the present invention Figure 1-Figure 3 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] Example:

[0028] like Figure 1-Figure 3 As shown, the utility model provides a four-wheel power-assisted bicycle, comprising a main frame 1, a front wheel shock-absorbing drive assembly 2 and a rear wheel shock-absorbing drive assembly 3. The front wheel shock-absorbing drive assembly 2 is installed at the front of the main frame 1, and the rear wheel shock-absorbing drive assembly 3 is installed at the rear of the main frame 1. The front wheel shock-absorbing drive assembly 2 comprises a front axle 21, a shock-absorbing part 22 and a drive part 23. The drive part 23 is installed in the middle of the front axle 21, and shock-absorbing parts 22 are provided on both sides of the drive part 23. Both ends of the front axle 21 are connected to front wheel bodies 4, and the two front wheel bodies 4 are respectively connected to the front axle 21 through the shock-absorbing parts 22. A seat 5 is provided above the main frame 1, and a battery 6 is installed below the seat 5. Rear wheel bodies 9 are installed on both sides of the rear wheel shock-absorbing drive assembly 3. When in use, the cooperation of the front wheel shock-absorbing drive assembly 2 and the rear wheel shock-absorbing drive assembly 3 can fully reduce shock during the movement of the vehicle, thereby improving the comfort of the vehicle. In addition, the battery 6 installed on the rear side can cooperate to supply energy to the front wheel shock-absorbing drive assembly 2 and the rear wheel shock-absorbing drive assembly 3, and perform shock reduction through the rear wheel shock-absorbing drive assembly 3.

[0029] The drive unit 23 includes a transmission chain 231, a first differential 232, a front wheel drive shaft 233, and a first drive motor 234. The first drive motor 234 is connected to the first differential 232 via the transmission chain 231, which in turn is connected to the front wheel drive shaft 233. Both ends of the drive shaft are connected to the front wheel body 4 via the shock absorber 22. Driven by the first drive motor 234, the transmission chain 231 rotates, simultaneously driving the first differential 232 and the front wheel drive shaft 233 to rotate synchronously, which in turn drives the front wheel body 4 to rotate. The front wheel and frame utilize independent suspension to ensure independent movement of the two wheels.

[0030] The rear-wheel damping drive assembly 3 includes a rear axle 31, a second differential 32, a shock absorber 22, and a second drive motor 33. The second differential 32 is mounted in the middle of the rear axle 31, and pedals 11 are mounted at the bottom of the main frame 1. The pedals 11 are connected to the output of the second drive motor 33 and the second differential 32 via a two-stage chain transmission. Both ends of the rear axle 31 are connected to the rear wheel body 9 via a fully floating hub 10. The rear wheel body 9 is coaxially arranged with the rear axle 31. The rear wheels can be driven in a dual-axle configuration using the second drive motor 33 or the pedals 11, or an undriven rear axle 31 can be used. This provides a variety of drive options and is convenient for customers. The coaxially arranged rear wheel body 9 and rear axle 31 are connected using a semi-independent suspension.

[0031] The middle part of the front wheel body 4 and the rear wheel body 9 is a fully floating hub 10, and a universal joint 101 is installed inside the full-floating hub 10. The upper part of the full-floating hub 10 is connected to the shock absorber 22, and the lower part is connected to the main frame 1 through the suspension link 102. A half shaft 103 is provided in the middle part of the full-floating hub 10, and the half shaft 103 is transmitted from the middle of the universal joint 101 to be connected to the front axle 21 or the rear axle 31. The universal joint 101 is supported on the full-floating hub 10 by two bearings on the inner and outer sides, which facilitates the removal of the half shaft 103, and the front wheel body 4 and the rear wheel body 9 do not need to be removed. The front wheel body 4 and the rear wheel body 9 with a suspended structure are not only convenient for the maintenance of the drive shaft, but also convenient for the disassembly and assembly of the front wheel body 4 and the rear wheel body 9.

[0032] The shock absorbing part 22 includes a shock absorber 221 and a shock absorbing spring 222. One end of the shock absorber 221 is connected to the main frame 1, and the other end of the shock absorber 221 is connected to the front axle 21 or the rear axle 31. The shock absorbing spring 222 is sleeved on the outside of the shock absorber 221. The cooperation between the shock absorber 221 and the shock absorbing spring 222 can effectively reduce the vibration caused by the front wheel during movement.

[0033] A shelf 7 is installed on the front side of the main frame 1. The front axle 21 has a large cargo space and a low center of gravity, which is not only convenient for storage, but also has high stability and comfort and is not prone to bumps.

[0034] The front part of the main frame 1 is detachably mounted with a quick-release handlebar 8, which transfers steering to the steering trapezoidal connecting rod below through a universal joint at the bottom. The quick-release handlebar 8 is not only easy to install, but also easy to install and rotate, with high rotation accuracy, making it easy to carry and transport the vehicle.

[0035] In summary, the four-wheel power-assisted bicycle has the characteristics of good shock absorption effect, high comfort, low center of mass, large carrying space, single drive of the front wheel and dual drive of the rear wheels.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A four-wheel power-assisted bicycle comprising a main frame (1), a front wheel shock-absorbing drive assembly (2) and a rear wheel shock-absorbing drive assembly (3), characterized in that: The front wheel shock-absorbing drive assembly (2) is installed at the front of the main frame (1), and the rear wheel shock-absorbing drive assembly (3) is installed at the rear of the main frame (1). The front wheel shock-absorbing drive assembly (2) comprises a front axle (21), a shock-absorbing part (22) and a drive part (23). The drive part (23) is installed in the middle of the front axle (21), and shock-absorbing parts (22) are provided on both sides of the drive part (23). Both ends of the front axle (21) are connected to front wheel bodies (4), and the two front wheel bodies (4) are respectively connected to the front axle (21) through the shock-absorbing parts (22). A seat (5) is provided above the main frame (1), and a battery (6) is installed below the seat (5). Rear wheel bodies (9) are installed on both sides of the rear wheel shock-absorbing drive assembly (3).

2. A four-wheel power-assisted bicycle according to claim 1, characterized in that: The driving unit (23) comprises a transmission chain (231), a first differential (232), a front wheel drive shaft (233) and a first driving motor (234); the first driving motor (234) is connected to the first differential (232) via the transmission chain (231); the first differential (232) is connected to the front wheel drive shaft (233); and both ends of the drive shaft are connected to the front wheel body (4) via a fully floating hub (10).

3. A four-wheel power-assisted bicycle according to claim 2, characterized in that: The rear wheel shock absorption drive assembly (3) comprises a rear axle (31), a second differential (32), a shock absorbing part (22) and a second drive motor (33); the second differential (32) is installed in the middle of the rear axle (31); a pedal (11) is installed at the bottom of the main frame (1); the pedal (11) and the output end of the second drive motor (33) are connected to the second differential (32) through a chain secondary transmission; both ends of the rear axle (31) are connected to the rear wheel body (9) through a full-floating wheel hub (10); the rear wheel body (9) and the rear axle (31) are coaxially arranged.

4. A four-wheel power-assisted bicycle according to claim 3, characterized in that: A universal joint (101) is installed inside the full-floating wheel hub (10). The upper part of the full-floating wheel hub (10) is connected to the shock absorbing part (22), and the lower part is connected to the main frame (1) through the suspension link (102). A half shaft (103) is provided in the middle of the full-floating wheel hub (10). The half shaft (103) is transmitted from the middle of the universal joint (101) and connected to the front shaft (21) or the rear shaft (31).

5. The four-wheel power-assisted bicycle according to claim 1, characterized in that: A shelf (7) is installed on the front side of the main frame (1).

6. The four-wheel power-assisted bicycle according to claim 1, characterized in that: A quick-release handlebar (8) is detachably mounted on the front portion of the main frame (1).

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