CN203593082U - Power generation device for bicycles - Google Patents

Abstract

The utility model relates to a power generation device for bicycles, which comprises a hub shell, a hub shaft and a pair of bearings arranged between the hub shell and the hub shaft, permanent magnets are embedded in the inner wall of the hub shell, and the permanent magnets The axis line of the shell is arranged symmetrically to the center. The hub shaft is equipped with a sleeve with a coil. The sleeve and the hub shaft are fixedly connected. The two ends pass through the small hole respectively and are connected with the lighting device. The utility model embeds a permanent magnet in the inner wall of the hub shell—as a motor stator, and sets a sleeve with a coil on the hub shaft—as a motor rotor. When the bicycle is riding, the wheel drives the hub shell to rotate, thereby realizing the stator and rotor. The relative rotation makes the coil cut the magnetic induction line to generate electric energy, and use the electric energy generated by this part to drive the lighting lamp with a certain power, so as to achieve the purpose of lighting at night.

Description

A generator for bicycles

technical field

The utility model relates to a power generation device for pedaling a bicycle. When the bicycle is riding, the power generation device in the front wheel bearing of the bicycle is used to perform magnetic wire cutting motion to generate electric energy to drive relatively high-power night lighting.

Background technique

When people are riding a bicycle, they will turn the front and rear wheels through the up and down movement of their feet. This artificial mechanical force will be consumed soon during the cycling process. If we can invent a device that can collect and convert this part of mechanical energy, and transmit it to some electronic devices with low electric power in time, it will add some fun to people's life.

In addition, people who like to ride off-road bicycles often have difficulty walking and restrict their movements because they cannot find sufficient electronic lighting equipment at night. If the wheel that the bicycle rotates around can be used as a continuous generator set, the electric energy produced by it can be provided to the lighting device, which will bring great convenience to people who ride at night.

The traditional bicycle power generation device generally uses the wheel to contact the gear on the generator stator, and the rotating gear drives the power generation device to achieve the power generation function. However, this power generation method will hinder the forward movement of the wheels and cause certain damage to the tires.

In order to solve this problem, Chinese invention patent ZL200410031274.3 proposes a bicycle wheel hub, and an electromagnetic power generating device is arranged between the hub shell and the hub shaft to generate electricity. From the perspective of its implementation, a protruding cylindrical chamber is designed on the axial side of the hub shell, a permanent magnet is fixed on the inner wall of the chamber, and an iron core coil matched with it is arranged on the opposite hub shaft. When the bicycle is riding, the coil cuts the magnetic induction line to generate electricity, which supplies power to the lights for lighting. Its disadvantages are complex structure and high cost. Its protruding cylindrical chamber is biased to one side of the hub shaft, which easily leads to uneven force, and the protruding cylindrical chamber and the protruding permanent magnet are difficult for assembly and maintenance. It's an inconvenience.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a power generation device for bicycles, which has a simple structure, is easy to assemble and has low cost.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A power generation device for a bicycle, comprising a hub shell, a hub shaft and a pair of bearings arranged between the hub shell and the hub shaft, characterized in that: the inner wall of the hub shell is embedded with a permanent magnet, the permanent The magnets are symmetrically arranged along the axis of the hub shell. The hub shaft is covered with a sleeve with a coil. The sleeve and the hub shaft are fixedly connected. a small hole, and the two ends of the coil wire are respectively passed through the small hole and connected to the lighting device.

The utility model also has the following further improvements:

1. The permanent magnet is located in the area where the hub shell covers the hub shaft, and the symmetrical centerline of the permanent magnet coincides with the symmetrical centerline of the hub shell.

2. Three arc-shaped permanent magnets with the same shape and size are embedded in the inner wall of the hub shell.

3. The hub shell is integrated with the wheel through the spokes.

The utility model embeds a permanent magnet in the inner wall of the hub shell—as a motor stator, and sets a sleeve with a coil on the hub shaft—as a motor rotor. When the bicycle is riding, the wheel drives the hub shell to rotate, thereby realizing the stator and rotor. The relative rotation makes the coil cut the magnetic induction line to generate electric energy, and use the electric energy generated by this part to drive the lighting lamp with a certain power, so as to achieve the purpose of lighting at night.

The utility model has simple structure and low cost. The hub shell and the permanent magnet are integrally designed, so it is easier to assemble as a whole; the permanent magnet adopts a symmetrical distribution, which makes the force more uniform, reduces wear, and can increase the service life of the device.

Description of drawings

Fig. 1 is a schematic diagram of the installation location of the power generation device provided by the embodiment.

Fig. 2 is a schematic structural diagram of the power generating device provided by the embodiment.

Fig. 3 is a cross-sectional view of the power generating device provided by the embodiment.

Fig. 4 is a schematic diagram of the electric energy output of the power generating device provided by the embodiment.

The symbols in the figure are as follows: 1-spoke, 2-front fork, 3-hub shell, 31-permanent magnet, 32-back cover, 4-hub shaft, 41-coil, 5-lighting device, 6-wire, 7- sleeve.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions of the utility model will be clearly and completely described below in conjunction with the drawings and embodiments.

Example

FIG. 1 is a schematic diagram of the installation location of the power generation device provided by this embodiment. Number 1 in the figure is the spoke supporting the whole wheel, 2 is the front fork, 3 is the hub shell, 4 is the hub shaft, the hub shell 3 is connected with the wheel through the spoke 1, and the front fork 2 is connected with the hub shaft 4. The power generating device provided in this embodiment is installed on the hub shell 3 and the hub axle 4 . Specifically, as shown in Fig. 2, Fig. 3 and Fig. 4: the power generation device for a bicycle provided by this embodiment includes a hub shell 3, a hub shaft 4 and a hub shell arranged between the hub shell 3 and the hub shaft 4 A pair of bearings (not shown in the figure), the inner wall of the hub shell 3 is embedded with a permanent magnet 31 . As shown in Figure 3: In this embodiment, three arc-shaped permanent magnets 31 with the same shape and size are embedded in the inner wall of the hub shell 3, and the permanent magnets 31 are symmetrically arranged along the axis of the hub shell 3, and the hub shaft 4 is fitted The sleeve 7 with the coil 41 is fixedly connected between the sleeve 7 and the hub shaft 4. Two small holes are opened on the rear cover 32 at the end of the hub shell 3, and the two ends of the coil wire 6 are inserted into the small holes respectively. Connect with lighting device 5 after going out. As shown in FIG. 2 , the permanent magnet 31 is located in the area where the hub shell 3 covers the hub axle 4 , and the symmetrical centerline of the permanent magnet 31 coincides with the symmetrical centerline of the hub shell 3 .

The hub shaft 4 is fixed relative to the hub shell 3, but the hub shell 3 moves in a circle with the wheel, so the coil mounted on the hub shaft 4 cuts the magnetic force lines of the permanent magnet 31 in the hub shell 3, thereby generating a certain amount of current. Subsequently, the current is delivered to the lighting device 5 through the wire 6 on the back cover 32 to make it illuminate. At the same time, it can be seen that the hub shell 3 and the hub shaft 4 are in a separated state due to the supporting effect of the bearings and are not in contact, so there will be no friction and no damage to the machine body.

In summary, it can be seen that the utility model embeds a permanent magnet in the inner wall of the hub shell—as a motor stator, and sets a sleeve with a coil on the hub shaft—as a motor rotor. When riding a bicycle, the wheel drives the hub shell to rotate, In this way, the relative rotation of the stator and the rotor is realized, the coil cuts the magnetic induction line to generate electric energy, and the electric energy generated by this part is used to drive a certain power lamp, so as to achieve the purpose of lighting at night. In addition, the utility model is simple in structure and low in cost. The hub shell and the permanent magnet are integrally designed, so it is easier to assemble as a whole; the permanent magnet adopts a symmetrical distribution, which makes the force more uniform, reduces wear and tear, and can increase the service life of the device. .

Finally, it is necessary to explain here that: the above content is only used to further describe the technical solution of the utility model in detail, and cannot be interpreted as limiting the scope of protection of the utility model. Some non-essential improvements and adjustments all belong to the protection scope of the present utility model.

Claims (4)

1. A power generating device for a bicycle, comprising a hub shell, a hub shaft and a pair of bearings arranged between the hub shell and the hub shaft, characterized in that: the inner wall of the hub shell is embedded with a permanent magnet, so The permanent magnets are symmetrically arranged along the axis of the hub shell. The hub shaft is covered with a sleeve with a coil. The sleeve and the hub shaft are fixedly connected. There are two small holes, and the two ends of the coil wire are respectively passed through the small holes and then connected with the lighting device. 2 . The power generation device for bicycles according to claim 1 , wherein the permanent magnet is located in the area where the hub shell covers the hub axle, and the symmetrical centerline of the permanent magnet coincides with the symmetrical centerline of the hub shell. 3 . 3. The power generation device for bicycles according to claim 2, characterized in that: three arc-shaped permanent magnets with the same shape and size are embedded in the inner wall of the hub shell. 4. The power generation device for a bicycle according to any one of claims 1 to 3, characterized in that: the hub shell is integrally connected with the wheel through spokes.

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