Shock absorption device of power-assisted bicycle

Abstract

The utility model discloses a power-assisted bicycle damping device which comprises a main bicycle frame and an auxiliary bicycle frame, a driving motor is installed in the main bicycle frame, output shafts are arranged on the two sides of the driving motor, the exteriors of the output shafts are connected through U-shaped clamping grooves, the main bicycle frame is provided with a bicycle frame rotating shaft fixing seat, and the bicycle frame rotating shaft fixing seat is connected with the auxiliary bicycle frame. The auxiliary frame is provided with an auxiliary frame rotating shaft, the frame rotating shaft fixing seat is rotatably connected with the auxiliary frame rotating shaft, the axis of the output shaft is overlapped with the axis of the auxiliary frame rotating shaft, and the output shaft and the auxiliary frame rotating shaft which are concentrically and non-coaxially arranged can ensure that the auxiliary frame rotating shaft is not in contact with the auxiliary frame rotating shaft when a vehicle jolts. The output shaft and the auxiliary frame rotating shaft move in a split mode, synchronous movement between the output shaft and the auxiliary frame rotating shaft is avoided, breakage of the output shaft in the long-term use process is avoided, and therefore the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of power-assisted bicycle equipment, and particularly relates to a shock-absorbing device for a power-assisted bicycle. Background Art

[0002] Power-assisted bicycles, also known as electric-assisted bicycles, are a new type of two-wheeled transportation. They combine the lightness and convenience of traditional bicycles with the auxiliary power of electric motors, effectively reducing the burden on riders when riding uphill, against headwinds, or carrying heavy loads.

[0003] When installing electric power-assisted bicycles today, the motor shaft is generally installed directly on the connecting shaft between the main frame and the sub-frame through the bearing seat. However, during use, it is found that the main frame and the sub-frame will vibrate when encountering bumpy roads. The connection of the motor shaft is at a stress node, which is prone to breakage after long-term use, resulting in the equipment being unable to operate normally and a short service life. Utility Model Content

[0004] The purpose of the present utility model is to provide a shock absorbing device for a power-assisted bicycle to solve the problems raised in the above-mentioned background technology.

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

[0006] A power-assisted bicycle shock-absorbing device comprises a main frame and a sub-frame, wherein a drive motor is installed inside the main frame, output shafts are provided on both sides of the drive motor, and the outsides of the output shafts are connected via U-shaped slots, the main frame is provided with a frame rotating shaft fixing seat, the sub-frame is provided with a sub-frame rotating shaft, the frame rotating shaft fixing seat is rotatably connected to the sub-frame rotating shaft, and the output shaft overlaps the axis of the sub-frame rotating shaft.

[0007] By adopting the above technical solution: when in use, when the vehicle passes through a bumpy road section, the frame shaft fixing seat connected to the main frame and the sub-frame vibrates synchronously, and the output shaft of the motor set concentrically but not uniaxially and the sub-frame shaft can move in a split manner during bumps, avoiding the output shaft from breaking during long-term use, thereby improving the service life of the equipment.

[0008] Preferably, an active transmission flywheel is provided on one side of the drive motor, and a secondary transmission active disc is provided on the other side. The active transmission flywheel is connected to the transmission disc through a transmission chain, the middle part of the transmission disc is connected to a pedal, the secondary transmission active disc is connected to the secondary transmission driven disc through a transmission chain, the secondary transmission driven disc is connected to the rear axle, and the rear axle is connected to the rear wheel.

[0009] By adopting the above technical solution: when in use, the active transmission flywheel can be driven by the pedal to rotate, driving the secondary transmission active plate to perform synchronous transmission, thereby driving the rear wheel to rotate, or the secondary transmission active plate can be directly driven by the drive motor to rotate, thereby driving the rear wheel to rotate, dual-drive, convenient to use.

[0010] Preferably, a right half-axle and a left half-axle are respectively provided on both sides of the rear axle, the right half-axle is connected to the rear wheel on the right side, and the left half-axle is connected to the rear wheel on the left side, and the axes of the right half-axle and the left half-axle overlap with the axis of the rear axle.

[0011] By adopting the above technical solution: overlapping the right half-axle and the left half-axle with the rear axle, the transmission stability is higher. When the vehicle deflects, the separately arranged right half-axle and the left half-axle are offset separately, thereby further improving the stability of the vehicle.

[0012] Preferably, a differential is provided between the secondary transmission driven plate and the rear axle.

[0013] By adopting the above technical solution, the driving stability and controllability of the vehicle can be further improved through the differential.

[0014] Preferably, shock absorbers are provided between the right and left wheeled half-axles and the main frame.

[0015] By adopting the above technical solution, the vibration and bumps caused by uneven road surface during vehicle driving can be reduced under the buffering of the shock absorber.

[0016] Preferably, a storage rack is provided at the rear of the main frame, and a mudguard is installed on the side of the storage rack.

[0017] By adopting the above technical solution, the fender installed on the side of the storage rack can vibrate synchronously with the vehicle, thereby ensuring the working stability of the fender.

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

[0019] 1. The output shaft and sub-frame shaft are set separately. The output shaft of the motor and the sub-frame shaft are set concentrically but not axially. They can move separately when the vehicle is bumpy, avoiding the output shaft from breaking during long-term use, thereby increasing the service life of the equipment.

[0020] 2. The vehicle's stability can be ensured when turning by rotating the right and left half-axles;

[0021] 3. Mudguards located on the sides of the storage rack can further improve the stability of the vehicle. 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 diagram of the bottom structure connection of the utility model;

[0024] Figure 3 for Figure 2 A magnified view of part A in FIG;

[0025] Figure 4 It is a rear view of the present invention.

[0026] In the figure: 1. Main frame; 2. Subframe; 3. Drive motor; 4. Output shaft; 5. U-shaped slot; 6. Frame shaft fixing seat; 7. Subframe shaft; 8. Active drive flywheel; 9. Secondary drive active plate; 10. Drive chain; 11. Drive plate; 12. Pedal; 13. Secondary drive driven plate; 14. Rear axle; 15. Rear wheel; 16. Right half-shaft; 17. Left half-shaft; 18. Differential; 19. Shock absorber; 20. Storage rack; 21. Fender. DETAILED DESCRIPTION

[0027] The following is a combination of the appended examples of the present invention Figures 1-4 , 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.

[0028] Example:

[0029] like Figures 1-4 As shown, the utility model provides a power-assisted bicycle shock absorption device, including a main frame 1 and a sub-frame 2, a driving motor 3 is installed inside the main frame 1, and output shafts 4 are arranged on both sides of the driving motor 3, and the outside of the output shaft 4 is connected by a U-shaped slot 5, the main frame 1 is provided with a frame shaft fixing seat 6, and the sub-frame 2 is provided with a sub-frame 2 shaft, the frame shaft fixing seat 6 is rotatably connected to the sub-frame 2 shaft, and the output shaft 4 overlaps with the axis of the sub-frame 2 shaft. When in use, when the main frame 1 and the sub-frame 2 are installed, when the vehicle passes through a bumpy road section, the frame shaft fixing seat 6 connected thereto and the sub-frame 2 shaft vibrate synchronously, and the output shaft 4 of the motor with concentric but different axes and the sub-frame 2 shaft can perform split movement when bumping, thereby avoiding the output shaft 4 from breaking during long-term use, thereby improving the service life of the equipment.

[0030] An active transmission flywheel 8 is provided on one side of the driving motor 3, and a secondary transmission active disc 9 is provided on the other side. The active transmission flywheel 8 is connected to a transmission disc 11 through a transmission chain 10, and a pedal 12 is connected to the middle of the transmission disc 11. The secondary transmission active disc 9 is connected to a secondary transmission driven disc 13 through a transmission chain 10, and the secondary transmission driven disc 13 is connected to a rear axle 14, and the rear axle 14 is connected to a rear wheel 15. When in use, the active transmission flywheel 8 can be driven by the pedal 12 to rotate and drive the secondary transmission active disc 9 for synchronous transmission, thereby driving the rear wheel 15 to rotate. The secondary transmission active disc 9 can also be directly driven by the driving motor 3 to rotate, thereby driving the rear wheel 15 to rotate. Dual drive is driven and convenient to use.

[0031] A right half-shaft 16 and a left half-shaft 17 are respectively provided on both sides of the rear axle 14. The right half-shaft 16 is connected to the right rear wheel 15, and the left half-shaft 17 is connected to the left rear wheel 15. The axes of the right half-shaft 16 and the left half-shaft 17 overlap with the axis of the rear axle 14. The overlapping right half-shaft 16 and the left half-shaft 17 and the rear axle 14 have high transmission stability. When the vehicle deflects, the separately arranged right half-shaft 16 and the left half-shaft 17 are offset separately, thereby further improving the stability of the vehicle.

[0032] A differential 18 is provided between the secondary transmission driven plate 13 and the rear axle 14 , and the differential 18 can further improve the driving stability and controllability of the vehicle.

[0033] Shock absorbers 19 are provided between the right and left wheel half shafts 16 and 17 and the main frame 1 . The shock absorbers 19 can reduce vibrations and bumps caused by uneven road surfaces during vehicle travel.

[0034] A storage rack 20 is provided at the rear of the main frame 1. In other embodiments, the storage rack 20 can also be replaced with a rear seat. A mudguard 21 is installed on the side of the storage rack 20. The mudguard 21 installed on the side of the storage rack 20 can vibrate synchronously with the vehicle, thereby ensuring the stability of the mudguard 21.

[0035] In summary, the device has a good shock absorption effect, the output shaft 4 has a long service life, and it has high stability when turning, thereby ensuring the service life and stability of the device.

[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 shock absorbing device for a power-assisted bicycle, characterized in that: The invention comprises a main frame (1) and a sub-frame (2); a driving motor (3) is installed inside the main frame (1); output shafts (4) are provided on both sides of the driving motor (3); the outside of the output shafts (4) are connected via U-shaped slots (5); the main frame (1) is provided with a frame rotating shaft fixing seat (6); the sub-frame (2) is provided with a sub-frame (2) rotating shaft; the frame rotating shaft fixing seat (6) is rotatably connected to the sub-frame (2) rotating shaft; the output shaft (4) and the axis of the sub-frame (2) rotating shaft overlap.

2. The shock absorbing device for a power-assisted bicycle according to claim 1, characterized in that: A driving flywheel (8) is provided on one side of the driving motor (3), and a secondary driving disc (9) is provided on the other side. The driving flywheel (8) is connected to a transmission disc (11) via a transmission chain (10). A pedal (12) is connected to the middle of the transmission disc (11). The secondary driving disc (9) is connected to a secondary driven disc (13) via a transmission chain (10). The secondary driven disc (13) is connected to a rear axle (14). The rear axle (14) is connected to a rear wheel (15).

3. The shock absorbing device for a power-assisted bicycle according to claim 2, characterized in that: A right half-axle (16) and a left half-axle (17) are respectively provided on both sides of the rear axle (14); the right half-axle (16) is connected to the rear wheel (15) on the right side, and the left half-axle (17) is connected to the rear wheel (15) on the left side; and the axes of the right half-axle (16) and the left half-axle (17) overlap with the axis of the rear axle (14).

4. The shock absorbing device for a power-assisted bicycle according to claim 2, characterized in that: A differential (18) is provided between the secondary transmission driven disc (13) and the rear axle (14).

5. The shock absorbing device for a power-assisted bicycle according to claim 3, characterized in that: A shock absorber (19) is provided between the right half-axle (16) and the left half-axle (17) and the main frame (1).

6. The shock absorbing device for a power-assisted bicycle according to claim 1, characterized in that: A storage rack (20) is provided at the rear of the main frame (1), and a fender (21) is installed on the side of the storage rack (20).

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