Bicycle power assisting device

Abstract

The utility model discloses a bicycle power assisting device and relates to a transmission device suitable for a bicycle. The bicycle aims to solve the problem that physical output of a rider is increased when an existing bicycle climbs a slope. The bicycle comprises a connecting line controller, a connecting line and at least one pedal booster. The pedal booster comprises a side plate, a swing rod, a pawl, a ratchet wheel and a reset spring. The ratchet wheel is coaxially fixed with a pedal rotating shaft of the bicycle, and the side plate is parallel to the end face of the ratchet wheel; the swing rod is rotationally connected with one side of the side plate at the fulcrum of the swing rod, so that the swing rod can rotate around the fulcrum of the swing rod; one end of the swing rod is connected with a pawl; the other end of the swing rod is connected with the side plate through a reset spring. The reset spring can drive the other end of the swing rod to swing, so that the pawl is separated from the ratchet; the other end of the swing rod is further connected with the connecting line controller through a connecting line. The connecting line controller can drive the other end of the swing rod to swing through the connecting line, and then the pawl is meshed with the ratchet wheel.

Description

Technical Field

[0001] The utility model relates to a transmission device suitable for a bicycle. Background Art

[0002] When riding uphill on existing bicycles, riders must rely entirely on their own physical strength to overcome gravity and friction. This not only significantly increases the rider's physical exertion but can also significantly reduce the riding experience. For daily commuters, long periods of high-intensity riding can lead to accumulated fatigue, which can affect work or study. Furthermore, the elderly and those with weaker physical fitness may not have the stamina to ride uphill and may need to interrupt their ride.

[0003] Therefore, many cyclists use electric bikes to reduce the physical exertion of riding uphill. However, the battery increases the overall weight of the vehicle, which creates an additional burden for riding on uneven roads, especially uphill sections. Secondly, the battery not only needs to be charged regularly, but also creates an additional cost burden for cyclists. Moreover, the battery life is limited, especially under high-intensity use or low-temperature conditions, where the battery performance degrades significantly and may not meet the needs of long-term or long-distance riding. Utility Model Content

[0004] The utility model aims to provide a bicycle power assist device in order to overcome the problem of increased physical exertion of the rider when the existing bicycle goes uphill.

[0005] The bicycle power-assisting device of the utility model comprises a connecting wire controller, a connecting wire and at least one pedal booster;

[0006] The pedal booster includes a side plate, a rocker arm, a pawl, a ratchet wheel and a return spring; the ratchet wheel is used to be coaxially fixed with the pedal rotation axis of the bicycle, and the side plate is arranged parallel to the end surface of the ratchet wheel;

[0007] The swing arm is rotatably connected to one side of the side plate at its own fulcrum, so that the swing arm can rotate around its own fulcrum;

[0008] A pawl is connected to one end of the pendulum rod;

[0009] The other end of the rocker arm is connected to the side plate via a return spring;

[0010] The return spring can drive the other end of the pendulum rod to swing, thereby disengaging the pawl from the ratchet wheel;

[0011] The other end of the pendulum rod is also connected to the connecting wire controller via a connecting wire;

[0012] The connecting wire controller can drive the other end of the swing rod to swing through the connecting wire, thereby causing the pawl and the ratchet to engage with each other.

[0013] The beneficial effects of the utility model are:

[0014] This utility model bicycle power-assist device can use hand strength to increase the propulsion force of the bicycle when riding uphill, relying solely on manual assistance. This can save leg power output, extend the riding distance, and save physical effort. It can exercise both hands and legs while riding, and also improve the adaptability and comfort of the bicycle in complex terrain conditions.

[0015] When the power-assist device is not in use, the pawl on the rocker arm remains separated from the ratchet wheel, just like a normal bicycle. This prevents excessive transmission from wasting work and damaging the original bicycle function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a matching structure of a bicycle power-assisting device and a bicycle of the utility model;

[0017] Figure 2 This is a schematic diagram of another matching structure of the bicycle power-assisting device of the utility model and the bicycle;

[0018] Figure 3 This is a schematic diagram of the coordination structure of the pedal booster and the left crank of the pedal in the bicycle power-assisting device of the present utility model;

[0019] Figure 4 This is a schematic diagram of the matching structure of the bicycle power-assisting device of the present invention, in which the number of the connecting wire controller and the number of the connecting wire are both two, and the number of the pedal booster is one;

[0020] Figure 5 This is a schematic diagram of the coordinated structure of the bicycle power assist device of the present invention, in which the number of the connecting wire controller, the connecting wire and the pedal booster are all two;

[0021] Figure 6 The diagram is a structural diagram of a pedal booster with side panels of another shape. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Specific implementation method 1

[0026] The bicycle power-assisting device of this embodiment includes a connecting wire controller 1, a connecting wire 2 and at least one pedal booster 3;

[0027] The pedal booster 3 includes a side plate 3-1, a rocker arm 3-2, a pawl 3-3, a ratchet wheel 3-4 and a return spring 3-5;

[0028] The ratchet 3-4 is used to be coaxially fixed with the rotation axis of the bicycle pedal, and the side plate 3-1 is arranged parallel to the end surface of the ratchet 3-4;

[0029] The swing rod 3-2 is rotatably connected to one side of the side plate 3-1 at its own fulcrum, so that the swing rod 3-2 can rotate around its own fulcrum;

[0030] One end of the pendulum rod 3-2 is connected to a ratchet 3-3;

[0031] The other end of the rocker arm 3-2 is connected to the side plate 3-1 via a return spring 3-5;

[0032] The return spring 3-5 can drive the other end of the swing rod 3-2 to swing, thereby causing the pawl 3-3 to disengage from the ratchet wheel 3-4;

[0033] The other end of the pendulum rod 3-2 is also connected to the connection line controller 1 via the connection line 2;

[0034] The connecting wire controller 1 can drive the other end of the swing rod 3-2 to swing through the connecting wire 2, thereby causing the pawl 3-3 and the ratchet wheel 3-4 to engage with each other.

[0035] Specifically, the bicycle power-assisting device of this embodiment is a device that uses hand strength to provide propulsion for the bicycle to go uphill. It is used in conjunction with a bicycle and can be installed on the bicycle after a simple modification without causing damage to the bicycle.

[0036] like Figures 1 to 6 As shown, the ratchet 3-4 of the pedal booster 3 is coaxially connected to the left crank of the bicycle pedal (the side that is not coaxially fixed with the sprocket), and a rocker 3-2 corresponding to the number of the ratchet 3-4 and matched with the ratchet 3-4 is installed on the outer side of the ratchet 3-4. The front end of the rocker 3-2 is provided with a suspended resettable pawl 3-3, and the rear side of the end of the rocker 3-2 (relative to the bicycle) is provided with a reset spring 3-5. The front side of the end of the rocker 3-2 (relative to the bicycle) is connected to the connecting line controller 1.

[0037] The connecting wire controller 1 can provide a second pulling force to the other end of the swing rod 3-2 through the connecting wire 2; the second pulling force can overcome the first pulling force / thrusting force provided by the return spring 3-5 to the other end of the swing rod 3-2, so that the swing rod 3-2 can rotate in the same direction as the bicycle wheel;

[0038] When the connecting line controller 1 pulls the rocker arm 3-2, it can drive the pawl 3-3 to insert into the tooth groove of the ratchet 3-4, thereby pushing the ratchet 3-4 to rotate in the same direction; when the connecting line controller 1 does not pull the rocker arm 3-2, the reset spring 3-5 can make the pawl 3-3 disengage from the ratchet 3-4.

[0039] That is, the connecting wire controller 1 can be manually operated to pull the connecting wire 2. When the rider does not manually operate the connecting wire controller 1, the rocker arm 3-2 is always separated from the ratchet 3-4 under the action of the return spring 3-5. The return spring 3-5 can be a tension spring to provide a first tension, or a compression spring (installed in the opposite position of the tension spring to provide a pressure) according to the installation direction. When the rider does not manually operate the connecting wire controller 1, the return spring 3-5 is not subjected to external force and is in a natural state. The ratchet 3-3 on the rocker arm 3-2 should be kept disengaged from the ratchet 3-4, and the rider can now ride the bicycle normally.

[0040] When going uphill, due to the slope, the bicycle will generate friction due to the decomposition of its own gravity on the basis of the original friction force, and the rider needs to provide greater force to the pedals with his legs and feet in order to go uphill. At this time, since the bicycle is in a forward state, the rotation directions of the bicycle wheel, the pedal rotating shaft and the ratchet 3-4 are all in the same direction, so it is necessary to apply a driving force in the same direction as the rotation to the ratchet 3-4 to generate a rotational torque. The specific process is that the rider manually operates the connecting line controller 1, provides a second pulling force to the swing rod 3-2, and then pulls the swing rod 3-2. The swing rod 3-2 overcomes the elastic force (first pulling force / thrusting force) of the return spring 3-5 and swings in the same direction as the bicycle wheel. The ratchet 3-3 is inserted into the tooth groove of the ratchet 3-4, thereby generating a driving force on the bicycle pedal rotating shaft, and then drives the wheel through the sprocket and chain, achieving an uphill power-assisting effect using both hands and legs.

[0041] After releasing the cable controller 1, the return spring 3-5 resets the pawl 3-3 on the rocker arm 3-2 to a disengaged position from the ratchet 3-4. Repeated manipulation of the cable controller 1 causes the rocker arm 3-2 to repeatedly push and disengage the ratchet 3-4, enabling manual uphill assist. The assist distance can also be varied by adjusting the size of the left crank ratchet 3-4.

[0042] The position of the rocker arm 3-2 is not unique and can be designed based on actual needs. Different installation positions can achieve the same effect. Furthermore, since the rocker arm 3-2 only requires a certain swing angle to operate, limit posts can be installed in the counterclockwise and clockwise directions to limit the swing angle of the rocker arm 3-2. The limit posts can be replaced with the bolts that securely connect the side panels 3-1 to the cover panel 3-7. Specifically, two bolts can be installed at the planned positions of the two limit posts to serve as limit posts.

[0043] Among them, a brake handle of a bicycle can be added as the connecting line controller 1. In the present invention, the brake handle and the brake handle belong to the same device and are named separately only for functional distinction.

[0044] like Figure 2 As shown, the connecting wire controller 1 and the original bicycle brake handle can be installed on the handlebar together. When a person holds the handlebar, the brake handle and the connecting wire controller 1 are arranged within the range of motion of the palm so that they can be operated flexibly when needed. Figure 1 As shown, the original bicycle handlebar is transformed into a butterfly handlebar with a double-layer handlebar, and the brake handle with a braking function and the connecting wire controller 1 with a power-assisting function are respectively fixed on the handlebars of different layers.

[0045] Typically the side panels are rectangular, but can be Figure 6 As shown, the side panels are set to be triangular to save materials and the weight of the device to a greater extent. Specific implementation method 2

[0047] This embodiment is a further explanation of the first embodiment. In this embodiment, the pedal booster 3 further includes a buffer spring 3-6;

[0048] One end of the rocker 3-2 is rotatably connected to one end of the pawl 3-3, so that the pawl 3-3 can rotate relative to the rocker 3-2 on the rotation plane of the ratchet 3-4;

[0049] The swing rod 3-2 is provided with a rotation limiting mechanism on the rotation path of the pawl 3-3;

[0050] The two ends of the buffer spring 3-6 are fixed to the rocker arm 3-2 and the pawl 3-3 respectively, and the buffer spring 3-6 can make the pawl 3-3 close to the rotation limiting mechanism.

[0051] The other technical features of this embodiment are exactly the same as those of embodiment 1.

[0052] Specifically, the rocker 3-2 is movably connected to one end of the pawl 3-3, and the pawl 3-3 can rotate relative to the rocker 3-2. Figures 4-6As shown, an angled slot is formed on the rocker arm 3-2, and one end of the pawl 3-3 is located in the slot, so that the pawl 3-3 can be limited by the two inner side walls of the slot when rotating, and the two inner side walls serve as a limiting mechanism for the pawl 3-3.

[0053] The pawl 3-3 is pulled or pushed toward the rotation limiting mechanism by the buffer spring 3-6, and the limiting mechanism provides a reverse pressure to the pawl 3-3 to support the pawl 3-3.

[0054] After the pawl 3-3 enters the tooth groove of the ratchet wheel 3-3 and pushes the ratchet wheel 3-3 downward, if the rocker arm 3-2, the return spring 3-5, or the like malfunctions and the pawl 3-3 cannot or does not have time to retract, if the pawl 3-3 is fixed to the rocker arm 3-2, the ratchet wheel 3-4 will move the pawl 3-3, thereby damaging the pawl 3-3. However, in this embodiment, there is a buffer spring 3-6. When the teeth of the ratchet wheel 3-4 push the pawl 3-3, the pawl 3-3 disengages from the tooth groove under the elastic force of the buffer spring 3-6 and slides over the back of the teeth of the ratchet wheel 3-4, thereby protecting the pawl 3-3. Specific implementation method three

[0056] This embodiment is a further explanation of the second embodiment. In this embodiment, the ratchet 3 - 4 is a ratchet flywheel.

[0057] The other technical features of this embodiment are exactly the same as those of the second embodiment.

[0058] Specifically, the ratchet 3-4 can use the same ratchet flywheel as the flywheel mechanism in the rear wheel of a bicycle, including the flywheel 3-10. When the pedals are not rotating, the flywheel 3-10 can also keep the ratchet 3-4 rotating by inertia during the rotation of the ratchet 3-4. At this time, the pawl slides over the back of the ratchet teeth, and the bicycle continues to move forward, which saves the rider more effort. Specific implementation method four

[0060] This embodiment is a further explanation of the first, second or third embodiment. In this embodiment, the number of the connecting wire controller 1 and the number of the connecting wire 2 are both two, and the number of the pedal booster 3 is one;

[0061] The two connection line controllers 1 can be fixed on the two handlebars of the bicycle respectively;

[0062] The two connecting wire controllers 1 are both connected to the other end of the rocker rod 3 - 2 in the pedal booster 3 through the corresponding connecting wire 2 .

[0063] The other technical features of this embodiment are exactly the same as those of embodiment one, two or three.

[0064] Specifically, if Figure 1 、 2As shown in Figure 4, two connecting wire controllers 1 are fixed to the left and right handlebars of the bicycle respectively, and control the same pedal booster 3 through the corresponding connecting wires 2. When accelerating, the left and right hands can alternately assist, increasing the assist frequency and reducing the effort of a single hand. Specific implementation method five

[0066] This embodiment is a further explanation of the first, second or third embodiment. In this embodiment, the number of the connecting wire controller 1, the connecting wire 2 and the pedal booster 3 are all two;

[0067] The two connection line controllers 1 can be fixed on the two handlebars of the bicycle respectively;

[0068] The two connecting line controllers 1 are each connected to the other end of a rocker rod 3 - 2 in a pedal booster 3 through a corresponding connecting line 2 .

[0069] The other technical features of this embodiment are exactly the same as those of embodiment one, two or three.

[0070] Specifically, if Figure 1 、 2 As shown in Figure 5, the two connecting wire controllers 1 are respectively fixed on the left and right handlebars of the bicycle, and are controlled by the same pedal booster 3 through the corresponding connecting wires 2. At this time, the connecting wire controllers 1 on the left and right hands can use power assistance at the same time to provide greater thrust to the pedal connecting shaft. Specific implementation method six

[0072] This embodiment is a further explanation of the fifth embodiment. In this embodiment, a cover plate 3-7 is further included.

[0073] Two pedal boosters 3 are stacked and fixed;

[0074] The cover plate 3 - 7 covers and is fixed to the side of the outer pedal booster 3 opposite to its own side plate 3 - 1 .

[0075] The other technical features of this embodiment are exactly the same as those of embodiment five.

[0076] Specifically, if Figure 1 、 2 As shown in Figures 3, 5, and 6, the two pedal boosters 3 are stacked. Since the parts therein are also symmetrical, the two pedal boosters 3 can be considered to be symmetrically arranged or mirrored.

[0077] Then, the cover plate 3 - 7 can be used to cover and protect the other exposed parts and mechanisms of the outer pedal booster 3 . Specific embodiment seven

[0079] This embodiment is a further description of one of the first, second, third or sixth embodiments. In this embodiment, the rocker 3 - 2 is L-shaped.

[0080] The other technical features of this embodiment are exactly the same as those of embodiments one, two, three or six.

[0081] Specifically, if Figures 4-6 As shown, the L-shaped rocker 3-2 can make the structure of the mechanism more compact, reduce the space occupied by the pedal booster 3, provide better torque transmission efficiency, and generate a larger torque at a smaller swing angle. At the same time, the swing angle of the L-shaped rocker 3-2 can be adjusted as needed, increasing the adaptability and flexibility of the mechanism. Specific embodiment eight

[0083] This embodiment is a further explanation of the seventh embodiment. In this embodiment, the pedal booster 3 further includes a rocker bearing 3-8;

[0084] The rocker arm 3-2 is rotatably connected to one side wall of the side plate 3-1 at its own fulcrum through the rocker arm bearing 3-8.

[0085] The other technical features of this embodiment are exactly the same as those of embodiment seven.

[0086] Specifically, if Figures 4-6 As shown, the rocker arm 3-2 is rotatably connected via the rocker arm bearing 3-8, which can reduce direct contact between the rocker arm 3-2 and other components, reduce friction, and make the rotation of the rocker arm 3-2 more labor-saving and smooth, and manual operation of the connecting line controller 1 can be relatively more labor-saving. Specific embodiment nine

[0088] This embodiment is a further description of one of the first, second, third, sixth or eighth embodiments. In this embodiment, the connecting wire 2 is a brake wire, and the connecting wire controller 1 is a brake handle.

[0089] The other technical features of this embodiment are exactly the same as those of embodiment one, two, three, six or eight.

[0090] Specifically, the connecting wire 2 serves as a brake wire, and the connecting wire controller 1 serves as a brake handle. The process by which the connecting wire controller 1 applies tension to the swing arm 3-2 via the connecting wire 2 is similar to the principle of conventional bicycle brakes. This allows riders to quickly master power assist operation after becoming familiar with brake operation. This also reduces the cost of moldable parts for the bicycle power assist device.

[0091] The above-mentioned connecting line controller 1 can also be replaced with a form similar to a motorcycle throttle rotation. Specific embodiment 10

[0093] This embodiment is a further explanation of the ninth embodiment. In this embodiment, the pedal booster 3 further includes a brake wire fixing mechanism 3-9;

[0094] The brake line fixing mechanism 3-9 is fixed to the outer skin of the brake line.

[0095] The other technical features of this embodiment are exactly the same as those of embodiment nine.

[0096] Specifically, if Figures 1 to 6 As shown, since the brake cable includes a cable tube and a cable core, it is necessary to allow the cable core to move relative to the cable tube while the cable tube is fixed. Therefore, a brake cable fixing mechanism 3-9 is required to fix the outer tube, and the connecting cable controller 1 is connected to the rocker arm 3-2 via the cable core.

[0097] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other embodiments.

Claims

1. A bicycle power assist device, characterized in that: It comprises a connecting line controller (1), a connecting line (2) and at least one pedal booster (3); The pedal booster (3) comprises a side plate (3-1), a rocker arm (3-2), a pawl (3-3), a ratchet wheel (3-4) and a return spring (3-5); The ratchet (3-4) is used to be coaxially fixed with the pedal rotation axis of the bicycle, and the side plate (3-1) is arranged parallel to the end surface of the ratchet (3-4); The swing rod (3-2) is rotatably connected to one side of the side plate (3-1) at its own fulcrum, so that the swing rod (3-2) can rotate around its own fulcrum; One end of the rocker (3-2) is connected to a ratchet (3-3); The other end of the rocker arm (3-2) is connected to the side plate (3-1) via the return spring (3-5); The return spring (3-5) can drive the other end of the swing rod (3-2) to swing, thereby causing the pawl (3-3) to disengage from the ratchet wheel (3-4); The other end of the swing rod (3-2) is also connected to the connecting line controller (1) via a connecting line (2); The connecting wire controller (1) can drive the other end of the swing rod (3-2) to swing via the connecting wire (2), thereby causing the ratchet (3-3) and the ratchet wheel (3-4) to mesh with each other.

2. The bicycle power assist device according to claim 1, wherein: The pedal booster (3) further comprises a buffer spring (3-6); One end of the rocker (3-2) is rotatably connected to one end of the pawl (3-3), so that the pawl (3-3) can rotate relative to the rocker (3-2) on the rotation plane of the ratchet (3-4); The swing rod (3-2) is provided with a rotation limiting mechanism on the rotation path of the pawl (3-3); The two ends of the buffer spring (3-6) are respectively fixed to the swing rod (3-2) and the pawl (3-3), and the buffer spring (3-6) can make the pawl (3-3) close to the rotation limiting mechanism.

3. The bicycle power assist device according to claim 2, characterized in that: The ratchet wheel (3-4) is a ratchet flywheel.

4. The bicycle power assist device according to claim 1, 2 or 3, characterized in that: The number of the connecting wire controller (1) and the number of the connecting wire (2) are both two, and the number of the pedal booster (3) is one; The two connection line controllers (1) can be fixed on two handlebars of the bicycle respectively; The two connecting line controllers (1) are both connected to the other end of the rocker (3-2) in the pedal booster (3) via corresponding connecting lines (2).

5. The bicycle power assist device according to claim 1, 2 or 3, characterized in that: The number of the connecting wire controller (1), the connecting wire (2) and the pedal booster (3) is two; The two connection line controllers (1) can be fixed on two handlebars of the bicycle respectively; The two connecting line controllers (1) are each connected to the other end of a swing rod (3-2) in a pedal booster (3) via a corresponding connecting line (2).

6. The bicycle power assist device according to claim 5, characterized in that: Also included is a cover plate (3-7); Two pedal boosters (3) are stacked and fixed; The cover plate (3-7) covers and is fixed to the side of the outer pedal booster (3) opposite to the side plate (3-1) thereof.

7. The bicycle power assist device according to any one of claims 1, 2, 3 or 6, characterized in that: The rocker (3-2) is L-shaped.

8. The bicycle power assist device according to claim 7, wherein: The pedal booster (3) further comprises a rocker bearing (3-8); The swing rod (3-2) is rotatably connected to a side wall of the side plate (3-1) at its own fulcrum through the swing rod bearing (3-8).

9. The bicycle power assist device according to any one of claims 1, 2, 3, 6, or 8, characterized in that: The connecting line (2) is a brake line, and the connecting line controller (1) is a brake handle.

10. The bicycle power assist device according to claim 9, characterized in that: Also included is a brake line fixing mechanism (3-9); The brake line fixing mechanism (3-9) is fixed to the outer skin of the brake line.

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