Electrically assisted off-road mountain bike

Abstract

The utility model discloses a kind of electric power-assisted cross-country mountain bikes, belong to mountain bike technical field, including frame, battery compartment, front power wheel group and rear shock frame, wherein, the front end of frame is rotatably provided with shock front fork, the upper end of shock front fork is connected with handlebar, lower end is then installed with front power wheel group. Hub motor is installed in front power wheel group, and battery compartment is installed on the outside of frame, and lithium battery in battery compartment is connected with shock front fork circuit by frame, shock front fork is also connected with hub motor circuit, whereby, hub motor is connected in series with battery compartment by shock front fork, and drive front power wheel group autonomous rotation after power supply in hub motor. Frame bottom installs speed change transmission device, user can drive rear wheel group rotation by speed change transmission device when riding, and get suitable speed ratio by adjusting freewheel, and hub motor should not affect normal riding under the condition of not power supply.

Description

Technical Field

[0001] This utility model relates to the field of mountain bike technology, specifically to an electric-assisted off-road mountain bike. Background Technology

[0002] For mountain bikes designed for off-road riding, high tire pressure means that bumpy roads will consume more energy and may even cause injury, while narrow tire width will result in insufficient grip. Therefore, mountain bikes often use low tire pressure and wide tires. However, this also gives mountain bikes better off-road capability than road bikes, making them more suitable for daily commuting and touring.

[0003] However, for mountain bikes navigating forest trails and hills, this setup increases the resistance of the ride, and the rugged terrain and steep inclines can easily cause fatigue for ordinary riders, thus reducing the range of their cycling adventures.

[0004] Therefore, in order to enhance the enjoyment of cycling and increase the distance traveled by mountain bikes, the applicant proposes a new technical solution that integrates the hub motor with the mountain bike without affecting the riding experience, thereby effectively expanding the range of mountain bike travel. Utility Model Content

[0005] Therefore, this utility model provides an electric-assisted off-road mountain bike, which solves the problem of limited range of existing mountain bikes by integrating a hub motor with the mountain bike.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses an electric-assisted off-road mountain bike, comprising:

[0008] The frame has a front suspension fork that rotates at the front, and the upper end of the front suspension fork is coaxially connected to the handlebars.

[0009] The battery compartment is fixedly mounted inside the frame at the back and connected to the suspension fork circuitry via the frame.

[0010] The front power-assisted wheel assembly is installed at the lower end of the shock-absorbing front fork and forms a series circuit with the battery compartment through the shock-absorbing front fork. The front power-assisted wheel assembly rotates autonomously after being powered on.

[0011] The rear shock absorber is mounted on the rear end of the rear wheel assembly, which is connected to the transmission. The transmission is hinged to the bottom of the frame, and the rear shock absorber is mounted on the frame.

[0012] Among them, human power is suitable for driving the rear wheel assembly to rotate through a speed-changing transmission device.

[0013] Furthermore, the front-assisted wheelset includes:

[0014] The front wheel has an outer rotor at the center, which is connected to the outer rotor by spokes;

[0015] The brake disc is coaxially and fixedly connected to the outer rotor at its center.

[0016] The inner stator is inserted at the outer rotor axis and connected to the battery compartment circuit via the shock-absorbing front fork.

[0017] Furthermore, the inner stator includes a movable shaft, windings, couplings, and internal hexagonal slots. The movable shaft is rotatably mounted at the center of the outer rotor, and windings are installed on the outside of the movable shaft. When the windings are energized, they generate a rotating magnetic field to drive the outer rotor to rotate.

[0018] A coupling is provided at the end of the movable shaft, and an internal hexagonal groove is provided at the end of the coupling.

[0019] Furthermore, the suspension fork includes:

[0020] The inner tube of the front fork has a power assist switch at the upper end and a shock absorber outer tube frame at the lower end. An inner stator is rotatably installed at the end of the shock absorber outer tube frame.

[0021] The push-pull electromagnet has a movable slide rod inserted inside. The end of the movable slide rod is equipped with a hexagonal plug, which is suitable for insertion into the internal hexagonal slot and prevents the movable shaft from rotating.

[0022] The push-pull electromagnet is installed on one side of the shock-absorbing outer cylinder frame, and the braking system is installed on the other side of the shock-absorbing outer cylinder frame. The battery compartment, power switch, push-pull electromagnet and winding form a series circuit.

[0023] Furthermore, the frame includes:

[0024] The frame has a handlebar mounting position on the front, where the handlebars are rotatably mounted. The battery compartment is installed on the rear of the frame.

[0025] The lifting seat is installed on the top of the beam frame, and the bottom of the beam frame is provided with a crank mounting position, on which a speed transmission device is installed.

[0026] The beam frame is also equipped with a first hinge position and a second hinge position, and a rear shock absorber is installed on the first hinge position and the second hinge position.

[0027] Furthermore, the rear shock absorber includes:

[0028] The rear triangular frame has a rear wheel assembly mounted at the rear. The upper end of the frame is hinged to one end of the shock absorber, and the other end of the shock absorber is hinged to the upper end of the shock absorber. The lower end of the shock absorber is fixedly hinged at the second hinge position.

[0029] The shock absorber base connecting rod is hinged at the rear end to the second hinge position, and at the front end to the bottom of the rear triangular frame. The first hinge position is hinged to the middle of the shock absorber frame.

[0030] Furthermore, the transmission device includes:

[0031] The chainring has a chain guide on the outside, a crank fixedly installed in the center of the chainring, pedals installed at both ends of the crank, and the crank rotation is set in the crank mounting position.

[0032] The derailleur is mounted on the rear triangle frame, and a shift flywheel is mounted at the rear of the rear triangle frame. The shift flywheel is connected to the chainring via a drive chain.

[0033] The drive chain passes through a chain guide and a gearbox, which is located below the gearbox flywheel and is suitable for mounting the drive chain at different positions on the gearbox flywheel.

[0034] Furthermore, it also includes a braking system, which includes a left brake, a front hub brake, a right brake, a rear hub brake, a shift paddle, and a first brake cable, a second brake cable, and a third brake cable.

[0035] The left brake, power assist switch, and front hub brake are connected in series via the first brake line. The left brake is suitable for triggering the power assist switch and the front hub brake, and the front hub brake is suitable for clamping the brake disc for braking.

[0036] The right brake is connected to the rear hub brake via the second brake cable. The rear hub brake is suitable for braking the rear wheel assembly. The shifter is connected to the transmission via the third brake cable.

[0037] The handlebars are equipped with a left brake and a right brake, and the bottom of the right brake has a shifter.

[0038] This utility model has the following advantages:

[0039] This invention connects the battery compartment, the shock-absorbing front fork, and the front assist wheel assembly in series. By using electric power to drive the front assist wheel assembly to rotate, it achieves the technical effect of assisting the bicycle. Furthermore, when no power is supplied, it can effectively avoid the motor generating resistance on the mountain bike, thereby reducing the human effort required. This invention has the advantages of compact structure and flexible use, and can significantly expand the range of mountain bike riding. Attached Figure Description

[0040] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0041] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0042] Figure 1 A three-dimensional view of the electric-assisted off-road mountain bike provided for this utility model;

[0043] Figure 2 A perspective view of the braking system provided for this utility model;

[0044] Figure 3 A perspective view of the speed transmission device provided by this utility model;

[0045] Figure 4 A perspective view of the rear shock absorber frame provided by this utility model;

[0046] Figure 5 A perspective view of the vehicle frame provided for this utility model;

[0047] Figure 6 A three-dimensional view of the shock-absorbing front fork provided for this utility model;

[0048] Figure 7 A perspective view of the inner stator provided for this utility model;

[0049] Figure 8 A perspective view of the front power steering wheel assembly provided for this utility model;

[0050] In the diagram: 1. Frame; 11. Beam; 12. Droplift seat; 13. Crank mount; 14. Handlebar mount; 15. First articulation point; 16. Second articulation point; 2. Drivetrain; 21. Crankset; 22. Chain guide; 23. Derailleur; 24. Pedals; 25. Drivetrain; 26. Crank; 27. Casiolift; 3. Battery compartment; 4. Suspension fork; 41. Fork inner tube; 42. Suspension outer tube frame; 43. Push-pull electromagnet; 44. Sliding rod; 45. Hex plug; 46. Power steering switch; 5. Front power steering wheel assembly; 51. Front... Wheel; 52 Spokes; 53 Outer rotor; 54 Brake disc; 55 Inner stator; 551 Movable shaft; 552 Winding; 553 Coupling; 554 Hexagon socket; 6 Handlebars; 7 Rear shock absorber; 71 Rear triangular frame; 72 Shock absorber; 73 Shock absorber base connecting rod; 74 Shock absorber; 8 Rear wheel assembly; 9 Braking system; 91 Left brake; 92 Front hub brake; 93 Right brake; 94 Rear hub brake; 95 Shifter; 96 First brake cable; 97 Second brake cable; 98 Third brake cable. Detailed Implementation

[0051] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] Please refer to this as well. Figures 1-8 This utility model discloses an electric-assisted mountain bike that uses a hub motor installed on the front wheel to drive the front wheel and provide assistance. Furthermore, when the hub motor is not needed, the transmission between the bicycle and the hub motor can be disconnected to prevent the hub motor from generating resistance on the bicycle. The technical solution disclosed in this utility model will be described below with specific embodiments.

[0053] In a specific embodiment of this utility model, the main structure of the electric-assisted mountain bike includes a frame 1, a battery compartment 3, a front assist wheel assembly 5, and a rear shock absorber 7. The frame 1 is a one-piece molded triangular frame structure, preferably made of carbon fiber. A shock-absorbing front fork 4 is rotatably mounted at the front end of the frame 1. The upper end of the shock-absorbing front fork 4 is connected to the handlebars, and the lower end is fitted with the front assist wheel assembly 5. A hub motor is installed inside the front assist wheel assembly 5, while the battery compartment 3 is installed on the outside of the frame 1. The battery compartment 3 is electrically connected to the shock-absorbing front fork 4 through the frame 1, and the shock-absorbing front fork 4 is electrically connected to the hub motor. Thus, the front assist wheel assembly 5 forms a series circuit with the shock-absorbing front fork 4 and the battery compartment 3, and rotates autonomously when the front assist wheel assembly 5 is powered on. On the other hand, a gear transmission device 2 is installed at the bottom of the frame 1. The gear transmission device 2 is connected to the rear wheel assembly 8. The rear wheel assembly 8 is rotatably mounted on the rear shock absorber 7. The rear shock absorber 7 is mounted on the rear side of the frame 1 and absorbs vibration load through elastic deformation. When riding, the user can drive the rear wheel assembly 8 to rotate through the gear transmission device 2 and obtain a suitable gear ratio by adjusting the flywheel.

[0054] In this embodiment, the front power-assisted wheel assembly 5 includes a front wheel 51, a brake disc 54, and an inner stator 55. The inner stator 55 is first installed at the lower end of the shock-absorbing fork 4 and is electrically connected to the battery compartment 3 via the shock-absorbing fork 4. A permanent magnet is installed inside the outer rotor 53 and mounted on the inner stator 55. Simultaneously, the outer rotor 53 can rotate on the inner stator 55 with the support of bearings. When energized, the inner stator 55 generates a rotating magnetic field or an alternating magnetic field through brushes to drive the outer rotor 53 to rotate. On the other hand, the outer rotor 53 is located at the center of the front wheel 51 and is connected to the outer rotor 53 via spokes 52, thereby driving the outer rotor 53 to rotate. The outer rotor 53 is also coaxially and fixedly connected to the brake disc 54. In case of emergency braking, the braking system 9 enables stopping the vehicle.

[0055] In this embodiment, the inner stator 55 includes a movable shaft 551, a winding 552, a coupling 553, and an internal hexagonal slot 554. The outer rotor 53 is rotatably mounted on the movable shaft 551 at its center via a bearing, while the outer side of the movable shaft 551 is equipped with a winding 552. When the winding 552 is energized, it generates a rotating magnetic field to drive the outer rotor 53 to rotate. In addition, a coupling 553 is provided at the end of the movable shaft 551, and an internal hexagonal slot 554 is provided at the end of the coupling 553.

[0056] Building upon the previous embodiment, specifically, when the outer rotor 53 needs to rotate autonomously to provide assistance, the coupling 553 secures the movable shaft 551 via the internal hexagonal slot 554, thereby using the front wheel 51 to drive the entire vehicle. When manual riding is required, the transmission relationship between the shock-absorbing front fork 4 and the coupling 553 is disconnected, allowing the movable shaft 551 to rotate freely. This prevents magnetic damping between the inner stator 55 and the outer rotor 53, thus avoiding hindering mountain bike riding.

[0057] Specifically, in some embodiments, the shock-absorbing fork 4 includes a fork inner tube 41 and a push-pull electromagnet 43. An assist switch 46 is provided at the upper end of the fork inner tube 41, while a shock-absorbing outer tube frame 42 is fitted at the lower end of the fork inner tube 41. The shock-absorbing outer tube frame 42 is elastically connected to the fork inner tube 41 to absorb vibration loads on the front assist wheel assembly 5. Furthermore, an inner stator 55 is rotatably provided at the end of the shock-absorbing outer tube frame 42, and a push-pull electromagnet 43 is provided on one side of the shock-absorbing outer tube frame 42. A braking system 55 is installed on the other side of the shock-absorbing outer tube frame 42. The battery compartment 3, the assist switch 46, the push-pull electromagnet 43, and the winding 552 form a series circuit. When the assist switch 46 is closed, the current in the battery compartment 3 enters the winding 552 through the push-pull electromagnet 43. The push-pull electromagnet 43 is subjected to the excitation magnetic field, and the movable slide rod 44 inserted inside it extends out. Since the movable slide rod 44 cannot rotate, and the end of the movable slide rod 44 is provided with a hexagonal plug 45, the hexagonal plug 45 is suitable for insertion into the internal hexagonal slot 554, thereby preventing the movable shaft 551 from rotating.

[0058] In a specific embodiment of this utility model, the frame 1 includes a beam 11 and a lifting seat 12. A handlebar mounting position 14 is installed on the front side of the beam 11, and a handlebar 6 is rotatably mounted within the handlebar mounting position 14. A battery compartment 3 is installed on the rear side of the beam 11, containing a replaceable lithium battery for providing power. The lifting seat 12 is installed on the top of the beam 11, and a crank mounting position 13 is provided at the bottom of the beam 11, on which a transmission device 2 is installed. The beam 11 also has a first hinge position 15 and a second hinge position 16, on which a rear shock absorber 7 is installed.

[0059] In some embodiments, the rear shock absorber 7 includes a rear triangular frame 71 and a shock absorber base connecting rod 73. The upper end of the rear triangular frame 71 is hinged to one end of the shock absorber 72, and the other end of the shock absorber 72 is hinged to the upper end of the shock absorber 74. The lower end of the shock absorber 74 is fixedly hinged at the second hinge position 16. The tail end of the shock absorber base connecting rod 73 is hinged to the second hinge position 16, and the head end is hinged to the bottom of the rear triangular frame 71. The first hinge position 15 is hinged to the middle of the shock absorber 72. Since the rear wheel set 8 is installed at the rear of the rear triangular frame 71, when the rear wheel set 8 bumps, the shock absorber 74 undergoes elastic deformation, and the relative deflection displacement between the rear triangular frame 71, the shock absorber 72, and the shock absorber base connecting rod 73 effectively absorbs the load and keeps the frame stable during driving.

[0060] In this embodiment, the transmission 2 includes a chainring 21 and a derailleur 23. First, a chain guide 22 is provided on the outside of the chainring 21. A drive chain 25 is wound between the chainring 21 and the derailleur 27. The drive chain 25 passes through the chain guide 22 and the derailleur 23 to prevent it from coming off. The derailleur 27 is mounted at the rear of the rear triangular frame 71 and is connected to the chainring 21 via the drive chain 25. Furthermore, a crank 26 is fixedly mounted at the center of the chainring 21, with pedals 24 mounted at both ends. The crank 26 is rotatably mounted on the crank mounting position 13. On the other hand, the derailleur 23 is mounted on the rear triangular frame 71. The derailleur 23 is located below the derailleur 27 and is adapted to attach the drive chain 25 to different positions on the derailleur 27 to obtain different gear ratios.

[0061] In some embodiments, the braking system 9 includes a left brake 91, a front hub brake 92, a right brake 93, a rear hub brake 94, a shifter 95, and a first brake cable 96, a second brake cable 97, and a third brake cable 98. The right brake 93 is connected to the rear hub brake 94 via the second brake cable 97, and the rear hub brake 94 is adapted to brake the rear wheel assembly 8. The left brake 91, the power assist switch 46, and the front hub brake 92 are connected in series via the first brake cable 96. The left brake 91 is adapted to trigger the power assist switch 46 and the front hub brake 92, and the front hub brake 92 is adapted to clamp the brake disc 54 for braking. In this embodiment, the power assist switch 46 is a limit switch, which can be opened and closed via the brake cable 96. The left brake 91 and the right brake 93 are installed at both ends of the handlebar 6. The shifter 95 is installed at the bottom of the right brake 93, and the shifter 95 is connected to the derailleur 23 via the third brake cable 98, thereby enabling gear shifting on the mountain bike.

[0062] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An electric-assisted mountain bike, characterized in that, include: The frame (1) has a shock-absorbing front fork (4) rotatably mounted at the front end, and the upper end of the shock-absorbing front fork (4) is coaxially connected to the handlebar (6). The battery compartment (3) is fixedly installed in the frame (1) at the back and is electrically connected to the shock-absorbing fork (4) through the frame (1); The front power-assisted wheel assembly (5) is installed at the lower end of the shock-absorbing front fork (4) and forms a series circuit with the battery compartment (3) through the shock-absorbing front fork (4). The front power-assisted wheel assembly (5) rotates autonomously after being powered on. The rear shock absorber (7) has a rear wheel assembly (8) rotatably mounted at its tail end. The rear wheel assembly (8) is connected to the transmission device (2) and the transmission device (2) is hinged to the bottom of the frame (1). The rear shock absorber (7) is mounted on the frame (1). Among them, human power is suitable for driving the rear wheel assembly (8) to rotate through the speed transmission device (2).

2. The electric-assisted mountain bike as described in claim 1, characterized in that, The front power steering wheel assembly (5) includes: The front wheel (51) has an outer rotor (53) at its center and is connected to the outer rotor (53) by spokes (52); The brake disc (54) is coaxially and fixedly connected to the outer rotor (53) at its center; The inner stator (55) is inserted at the axis of the outer rotor (53) and is electrically connected to the battery compartment (3) through the shock-absorbing fork (4).

3. The electric-assisted mountain bike as described in claim 2, characterized in that, The inner stator (55) includes a movable shaft (551), a winding (552), a coupling (553), and an internal hexagonal slot (554). The movable shaft (551) is rotatably mounted at the center of the outer rotor (53). The winding (552) is installed on the outside of the movable shaft (551). When the winding (552) is energized, it generates a rotating magnetic field to drive the outer rotor (53) to rotate. The coupling (553) is provided at the end of the movable shaft (551), and the internal hexagonal groove (554) is provided at the end of the coupling (553).

4. The electric-assisted mountain bike as described in claim 3, characterized in that, The shock-absorbing fork (4) includes: The inner tube (41) of the front fork is equipped with a power assist switch (46) at the upper end and a shock absorber outer tube frame (42) at the lower end. The inner stator (55) is rotatably installed at the end of the shock absorber outer tube frame (42). The push-pull electromagnet (43) has a movable slide rod (44) inserted inside. The end of the movable slide rod (44) is provided with a hexagonal plug (45). The hexagonal plug (45) is adapted to be inserted into the internal hexagonal slot (554) and prevent the movable shaft (551) from rotating. The push-pull electromagnet (43) is located on one side of the shock-absorbing outer cylinder frame (42), and a braking system (9) is installed on the other side of the shock-absorbing outer cylinder frame (42). The battery compartment (3), the power assist switch (46), the push-pull electromagnet (43) and the winding (552) form a series circuit.

5. The electric-assisted mountain bike as described in claim 1, characterized in that, The frame (1) includes: The beam frame (11) has a handlebar mounting position (14) installed on the front side, and a handlebar (6) is rotatably installed in the handlebar mounting position (14). The battery compartment (3) is installed on the rear side of the beam frame (11). A lifting seat (12) is installed on the top of the beam frame (11), and a crank mounting position (13) is provided at the bottom of the beam frame (11). A speed transmission device (2) is installed on the crank mounting position (13). The beam frame (11) is also provided with a first hinge position (15) and a second hinge position (16), and a rear shock absorber (7) is installed on the first hinge position (15) and the second hinge position (16).

6. The electric-assisted mountain bike as described in claim 5, characterized in that, The rear shock absorber (7) includes: The rear triangular frame (71) has the rear wheel assembly (8) installed at the rear. The upper end is hinged to one end of the shock absorber (72), and the other end of the shock absorber (72) is hinged to the upper end of the shock absorber (74). The lower end of the shock absorber (74) is fixedly hinged on the second hinge position (16). The shock absorber base connecting rod (73) is hinged at its tail end to the second hinge position (16) and at its head end to the bottom of the rear triangular frame (71). The first hinge position (15) is hinged to the middle of the shock absorber frame (72).

7. The electric-assisted mountain bike as described in claim 6, characterized in that, The speed transmission device (2) includes: A chainring (21) is provided with a chain guide (22) on the outside. A crank (26) is fixedly installed at the center of the chainring (21). Pedals (24) are installed at both ends of the crank (26), and the crank (26) is rotatably mounted on the crank mounting position (13). The gearbox (23) is mounted on the rear triangular frame (71), and a gear shift flywheel (27) is mounted at the rear of the rear triangular frame (71). The gear shift flywheel (27) is connected to the chainring (21) via a transmission chain (25). The transmission chain (25) passes through the chain guide (22) and the gearbox (23), the gearbox (23) is located below the variable speed flywheel (27) and is adapted to hang the transmission chain (25) at different positions on the variable speed flywheel (27).

8. The electric-assisted mountain bike as described in claim 4, characterized in that, The braking system (9) includes a left brake (91), a front hub brake (92), a right brake (93), a rear hub brake (94), a paddle shifter (95), a first brake cable (96), a second brake cable (97), and a third brake cable (98); The left brake (91), the power assist switch (46) and the front hub brake (92) are connected in series via the first brake line (96). The left brake (91) is adapted to trigger the power assist switch (46) and the front hub brake (92). The front hub brake (92) is adapted to clamp the brake disc (54) for braking. The right brake (93) is connected to the rear hub brake (94) via a second brake cable (97), and the rear hub brake (94) is adapted to brake the rear wheel assembly (8). The shifter (95) is connected to the transmission device (2) via the third brake line (98). The left brake (91) and the right brake (93) are installed at both ends of the handlebar (6). The shifter (95) is installed at the bottom of the right brake (93).

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