CN207191273U - A kind of electric assisted bicycle - Google Patents

Abstract

An electric power-assisted bicycle belongs to the technical field of walking tools. Including frame, handlebar, seat cushion, suspension front fork, front wheel, rear wheel, motor unit and battery assembly, frame includes head tube, upper tube, down tube, bottom bracket, middle tube, rear upper fork, rear The lower fork and the dropout, the head tube and the middle tube are arranged parallel to each other, one end of the upper tube and one end of the lower tube are connected to the head tube, the other end of the upper tube is connected to the upper end of the middle tube, and one end of the seat stay and the chain stay Jointly connect the hook claws, the other end of the rear seat stay is connected with the middle tube and corresponds to the bottom of the upper tube, the other end of the rear chain stay, the other end of the down tube and the lower end of the middle tube are jointly connected to the bottom bracket. In the open cavity, the battery assembly is arranged in the tube cavity of the down tube. Advantages: the frame has good stability; the motor unit is set in the inner cavity of the bottom bracket, which can balance the center of gravity of the vehicle and improve riding safety and stability; the battery component is stored in the tube cavity of the down tube, which can prolong the service life , and reduce security risks.

Description

An electric power-assisted bicycle

technical field

The utility model belongs to the technical field of walking tools, in particular to an electric power-assisted bicycle.

Background technique

Electric power-assisted bicycles have become an indispensable means of transportation in people's daily life because they can also give people the pleasure of enjoying sports while walking instead of walking. An electric power assist bicycle usually consists of components such as a frame, a handlebar, front and rear wheels, a motor unit, and a battery assembly. The frame is a key load-bearing component of an electric power-assisted bicycle, and is usually composed of thin-walled seamless pipes. The welding process and quality determine the production efficiency and service life of the electric power-assisted bicycle. The vehicle frame generally includes a head tube, an upper tube, a lower tube, and a rear fork frame in the middle tube. The connection and installation between the pipe fittings involves multiple butt welding. The welding here is generally fish scale welding, which has poor aesthetics. In existing electric power-assisted bicycles, the motor unit is usually installed at the lower part of the frame, and the battery assembly is arranged below the motor unit. Because the motor unit and battery assembly increase the weight of the rear of the vehicle body, it is easy to cause the center of gravity of the vehicle to shift. In addition, the battery components are exposed to the outside world and are often exposed to the sun and rain. At the same time, they are also polluted by road dust and mud, which poses safety hazards and affects the service life of the battery.

In view of the above-mentioned prior art, it is necessary to improve the structure of the existing electric power-assisted bicycle. For this reason, the applicant has made a beneficial design, and the technical solution to be introduced below is produced under this background.

Contents of the invention

The purpose of the utility model is to provide an electric power-assisted bicycle, the overall strength of the vehicle frame is high, the battery distribution is reasonable, and the use safety is high.

The purpose of this utility model is achieved in this way. An electric power-assisted bicycle includes a vehicle frame, a handlebar, a seat cushion, a shock-absorbing front fork, a front wheel, a rear wheel, a motor unit and a battery assembly, and is characterized in that: The vehicle frame includes a head tube, an upper tube, a lower tube, a bottom bracket, a middle tube, a seat stay, a chain stay and a dropout, the head tube and the middle tube are arranged parallel to each other, and the upper tube is arranged horizontally , one end of the upper tube and one end of the lower tube are jointly connected to the head tube, the other end of the upper tube is connected to the upper end of the middle tube, one end of the seat stay and the chain stay is jointly connected to the hook, and the other end of the seat stay Connected with the middle tube and corresponding to the bottom of the upper tube, the other end of the chainstay, the other end of the down tube and the lower end of the middle tube are jointly connected to the bottom bracket. The handlebar is installed on the upper end of the head tube, and the seat The pad is installed on the upper end of the middle tube through the seat tube, the shock-absorbing front fork is installed on the lower end of the head tube, the front wheel is fitted to the shock-absorbing front fork, and the rear wheel is fitted to the dropout , the motor unit is arranged in the cavity of the bottom bracket, and the battery assembly is arranged in the tube cavity of the down tube.

In a specific embodiment of the present utility model, the handlebar is a one-piece handlebar.

In another specific embodiment of the present utility model, the head tube, upper tube, down tube, bottom bracket, middle tube, seat stay, chain stay and dropout of the vehicle frame are welded smoothly connect.

In yet another specific embodiment of the present utility model, it also includes a transmission device. The transmission device includes a chainring, a crank and a chain. The chainring and the crank are fixed on the central shaft of the motor in the motor unit, and the crank Foot pedals are installed at the end of the rear wheel, the rear wheel includes a hub and a flywheel, the hub is fixed on the dropout through a quick release lever, the flywheel is arranged on the hub, and the chainring is connected with the flywheel through a chain.

In yet another specific embodiment of the present utility model, the rims of the front wheel and the rear wheel both adopt a three-knife integrated rim.

In yet another specific embodiment of the present utility model, the battery assembly is equipped with a battery start button, a battery indicator light and a battery controller, and the battery start button and battery indicator light are connected to the battery by the battery controller. The components are electrically connected, the battery start button and the battery indicator light are arranged on the upper surface of the down tube and close to the head tube, and the battery controller is set in the lumen of the down tube.

In yet another specific embodiment of the present utility model, a battery storage opening is provided on the lower tube, and a battery cover is provided on the battery storage opening.

Due to the adoption of the above-mentioned structure, the utility model has the beneficial effects compared with the prior art: the vehicle frame is beautiful, stable and firm; the motor unit is arranged in the inner cavity of the bottom bracket, which can balance the vehicle body. The center of gravity improves riding safety and stability; the battery components are housed in the lumen of the down tube, which can avoid the sun and rain, thereby prolonging the service life and reducing safety hazards.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a side view of the vehicle frame described in the utility model.

Fig. 3 is an exploded view of the three-dimensional structure of the vehicle frame of the present invention.

In the figure: 1. Frame, 11. Head tube, 12. Upper tube, 13. Down tube, 131. Battery storage port, 132. Battery cover, 14. Bottom bracket, 15. Middle tube, 16. Rear upper fork , 17. Chainstay, 18. Dropout; 2. Handlebar; 3. Seat cushion, 31. Seat tube; 4. Shock-absorbing front fork; 5. Front wheel; 6. Rear wheel, 61. Hub, 62. Flywheel; 7. Motor unit; 8. Battery assembly, 81. Battery start button, 82. Battery indicator light; 9. Transmission device, 91. Chainring, 92. Crank, 93. Chain.

Detailed ways

The applicant will describe in detail the specific implementation of the present invention below in conjunction with the accompanying drawings, but the applicant's description of the embodiments is not a restriction on the technical solution, and any changes based on the concept of the present invention in form rather than in substance should be regarded as Protection scope of the present utility model.

Please refer to Fig. 1, Fig. 2 and Fig. 3. The utility model relates to an electric power-assisted bicycle, including a frame 1, a handlebar 2, a seat cushion 3, a shock-absorbing front fork 4, a front wheel 5, a rear wheel 6, and a motor unit 7. Battery assembly 8 and transmission device 9 . The vehicle frame 1 includes a head pipe 11, an upper pipe 12, a lower pipe 13, a bottom bracket 14, a middle pipe 15, a rear upper fork 16, a rear chain stay 17 and a dropout 18, and the described head pipe 11 and middle pipe 15 are arranged parallel to each other, the upper pipe 12 is arranged horizontally, one end of the upper pipe 12 and one end of the lower pipe 13 are jointly connected to the head pipe 11, the other end of the upper pipe 12 is connected with the upper end of the middle pipe 15, and the rear One end of the upper fork 16 and the rear chain stay 17 is jointly connected with the claw 18, the other end of the rear chain stay 16 is connected with the middle pipe 15 and corresponds to the bottom of the upper pipe 12, the other end of the rear chain stay 17, the other end of the lower pipe 13 One end and the lower end of the middle pipe 15 are jointly connected with the bottom bracket 14 . This structure contributes to the overall strength of the frame. In this embodiment, the head tube 11, upper tube 12, down tube 13, bottom bracket 14, middle tube 15, rear upper fork 16, rear lower fork 17 and dropout 18 of the vehicle frame 1 are connected by flat Connecting by welding can get the appearance effect of carbon fiber frame and improve the aesthetics of the whole vehicle. The handlebar 2 is installed on the upper end of the head pipe 11, and the handlebar 2 has an integrated structure, on which left and right turn signals and display instruments are arranged. The seat cushion 3 is installed on the upper end of the middle pipe 15 through the seat pipe 31 . The shock-absorbing front fork 4 is installed on the lower end of the head pipe 11, the lower end of the shock-absorbing front fork 4 fixes the front wheel 5 and the front brake caliper, and the front wheel 5 is adapted to the shock-absorbing front fork 4 Install. The shock-absorbing front fork 4 realizes shock absorption by a shock-absorbing spring. Described rear wheel 6 and rear brake caliper are fitted with dropout 18 and installed. Here the rims of the front wheel 5 and the rear wheel 6 all adopt the three-knife integrated rim. The motor unit 7 is arranged in the inner cavity of the bottom bracket 14, thereby balancing the center of gravity of the vehicle and improving riding safety and stability. The battery assembly 8 is arranged in the lumen of the lower tube 13 , the lower tube 13 is provided with a battery storage opening 131 , and the battery storage opening 131 is equipped with a battery cover 132 . The battery assembly 8 is easy to install, and is not exposed to the external environment, so the service life is prolonged. In addition, the battery assembly 8 is also equipped with a battery start button 81, a battery indicator light 82 and a battery controller. The battery start button 81 and the battery indicator light 82 are electrically connected to the battery assembly 8 through the battery controller. The battery The start button 81 and the battery indicator light 82 are arranged on the upper surface of the down tube 13 and close to the head tube 11 , and the battery controller is set in the lumen of the down tube 13 . The transmission device 9 includes a chainring 91, a crank 92 and a chain 93. The toothed plate 91 and the crank 92 are fixed on the central axis of the motor in the motor unit 7, and the end of the crank 92 is equipped with a pedal. The wheel 6 includes a hub 61 and a flywheel 62 , the hub 61 is fixed on the dropout 18 through a quick release lever, the flywheel 62 is arranged on the hub 61 , and the chainring 91 is connected with the flywheel 62 through a chain 93 .

Claims (7)

1. An electric power-assisted bicycle, comprising a vehicle frame (1), a handlebar (2), a seat cushion (3), a shock-absorbing front fork (4), a front wheel (5), a rear wheel (6), a motor unit ( 7) and the battery assembly (8), characterized in that: the vehicle frame (1) includes a head pipe (11), an upper pipe (12), a lower pipe (13), a bottom bracket (14), a middle pipe (15 ), rear upper fork (16), rear upper fork (17) and dropout (18), described first pipe (11) and middle pipe (15) are arranged parallel to each other, and described upper pipe (12) is horizontal Setting, one end of the upper pipe (12) and one end of the lower pipe (13) are jointly connected to the head pipe (11), and the other end of the upper pipe (12) is connected with the upper end of the middle pipe (15), and the seat stay ( 16) and one end of the chainstay (17) are jointly connected with the hook claw (18), and the other end of the chainstay (16) is connected with the middle pipe (15) and corresponds to the bottom of the upper pipe (12), and the chainstay ( 17), the other end of the down pipe (13) and the lower end of the middle pipe (15) are jointly connected to the bottom bracket (14), and the handlebar (2) is installed on the upper end of the head pipe (11). The seat cushion (3) is installed on the upper end of the middle tube (15) through the seat tube (31), the shock-absorbing front fork (4) is installed on the lower end of the head tube (11), and the front wheel (5) It is adapted to be installed with the shock-absorbing front fork (4), the described rear wheel (6) is adapted to be installed with the hook (18), and the described motor unit (7) is arranged in the inner cavity of the bottom bracket (14), The battery assembly (8) is arranged in the lumen of the down tube (13). 2. An electric power-assisted bicycle according to claim 1, characterized in that said handlebar (2) is a one-piece handlebar. 3. An electric power-assisted bicycle according to claim 1, characterized in that the head pipe (11), upper pipe (12), lower pipe (13), bottom bracket (14) of the vehicle frame (1) , the middle pipe (15), the rear upper fork (16), the rear chain fork (17) and the dropouts (18) are connected by smooth welding. 4. A kind of electric assist bicycle according to claim 1, it is characterized in that also comprising transmission device (9), described transmission device (9) comprises chainring (91), crank (92) and chain (93) , the toothed plate (91) and the crank (92) are fixed on the central axis of the motor in the motor unit (7), the end of the crank (92) is equipped with a pedal, and the rear wheel (6) includes a hub (61 ) and a flywheel (62), the hub (61) is fixed on the hook (18) through a quick release lever, the flywheel (62) is set on the hub (61), and the chainring (91) passes through the chain ( 93) is connected with flywheel (62). 5. An electric power-assisted bicycle according to claim 1, characterized in that the rims of the front wheel (5) and the rear wheel (6) are all three-knife integrated rims. 6. An electric power-assisted bicycle according to claim 1, characterized in that said battery assembly (8) is equipped with a battery start button (81), a battery indicator light (82) and a battery controller, said The battery start button (81) and the battery indicator light (82) are electrically connected to the battery assembly (8) through the battery controller, and the battery start button (81) and the battery indicator light (82) are arranged on the top of the lower tube (13). The side surface and close to the position of the head tube (11), the battery controller is arranged in the lumen of the down tube (13). 7. An electric power-assisted bicycle according to claim 1, characterized in that said lower tube (13) is provided with a battery storage opening (131), and said battery storage opening (131) is equipped with battery cover (132).