JPH0570182U - Brushless DC motor for wheel drive - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a brushless DC motor for driving a wheel, and is particularly characterized by driving a wheel with a simple structure and at a low cost. A brushless DC motor for driving a wheel according to the present invention is a brushless DC motor for driving a wheel, wherein the magnetic body (1) is rotated by cooperation of a magnetic body (1) and electromagnets (3a, 3b). , The magnetic body (1) is arranged at equal intervals along the circumference of the wheel (12) made of a non-magnetic body, and the electromagnets (3a, 3b) are arranged in the vicinity of the magnetic body (1). The magnetic body (1) is magnetically driven, and the wheels (12) are rotated as the magnetic body (1) rotates.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brushless DC motor for driving wheels, and more particularly to a new improvement for driving wheels with a simple structure and at low cost.

[0002]

[Prior Art]

 The principle of a generally known brushless DC motor is shown in FIGS. 4 and 5. Reference numeral 1 is a rectangular rotor made of a magnetic material, and the rotor 1 is a rotor supported by a bearing (not shown). It has a shaft 2. A pair of electromagnets 3a and 3b are arranged on the periphery of the rotor 1 and at positions separated from each other. Each electromagnet 3a, 3b is composed of a U-shaped iron core 4a, 4b and an exciting coil 5a, 5b wound around the iron core 4a, 4b. The iron cores 4a and 4b are fixed in a non-contact state with the surface of the rotor 1 so as to sandwich the peripheral edge of the rotor 1 from both sides. Therefore, by supplying an arbitrarily controlled current to the coils 5a and 5b, magnetic poles are generated in the iron cores 4a and 4b, and the rotor 1 is magnetically driven accordingly, and as a result, The shaft 2 rotates. By using the brushless DC motor configured as described above as a drive source of a vehicle, for example, a vehicle with less friction loss can be configured.

[0003]

[Problems to be solved by the device]

 The conventional brushless DC motor for driving a wheel has the following problems because it is configured as described above. That is, by mechanically connecting the rotating shaft 2 of the brushless DC motor to the shaft of the wheel directly or by interposing a gear mechanism, mechanical loss occurs and the efficiency of transmission of force from the drive source decreases. Not only that, but there was a problem that the structure became complicated.

The present invention has been made to solve the above problems, and in particular, it is an object of the present invention to provide a brushless DC motor for driving wheels, which has a simple structure and drives the wheels at low cost. And

[0005]

[Means for Solving the Problems]

 In the wheelless brushless DC motor according to the present invention, the magnetic body is rotated by the cooperation of the magnetic body and the electromagnet, and the magnetic body is made of non-magnetic material at equal intervals along the circumference of the wheel. And the electromagnet is disposed in the vicinity of the magnetic body to magnetically drive the magnetic body, and the wheels are rotated in accordance with the rotation of the magnetic body.

[0006]

[Action]

 In the brushless DC motor for driving wheels according to the present invention, magnetic bodies are magnetically driven by the electromagnets by arranging the magnetic bodies at equal intervals along the circumference of the wheel and disposing the electromagnets close to the magnetic bodies. That is, the wheel can be rotated, the wheel can be rotated with the rotation, and the wheel can be rotated without mechanical connection.

[0007]

【Example】

 Hereinafter, preferred embodiments of a brushless DC motor for driving a wheel according to the present invention will be described in detail with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described using the same reference numerals.

In FIGS. 1 and 2, reference numeral 10 indicates a tire of a wheel, and the tire 10 is supported by a plurality of spokes 11. The spokes 11 are arranged radially at equal angles from the rotating shaft 2 and are made of a non-magnetic material made of resin or stainless steel. Therefore, the wheel 12 is composed of the rubber tire 10 and the spoke 11 made of a non-magnetic material.

A plurality of magnetic bodies 1 made of iron or the like are fixed to the circumference of the wheel 12, that is, the peripheral edge portion of the spoke 11, so that the magnetic body 1 is distributed along the circumference of the wheel 12. It will be arranged at equal intervals. An electromagnet 3a having an iron core 4a and an exciting coil 5a wound around the iron core 4a is arranged near the magnetic body 1. The tip of the iron core 4a of the electromagnetic stone 3a is fixed in a non-contact state so as to sandwich the magnetic body 1 from both sides. Further, another electromagnet 3b is arranged near the electromagnet 3a.

The iron core 4b of the electromagnet 3b is arranged apart from the iron core 4a by an angle α, and this angle α is 1.5 times the angle β of the magnetic bodies 1 arranged equally. Has an angle of. That is, the angle α is set such that when the magnetic body 1 is arranged in the iron core 4a, the iron core 4b of the electromagnet 3b is arranged between the magnetic bodies 1 and 1 (Fig. 2). By arranging at such an angle, the magnetic body 1 can be affected by the magnetism of the electromagnets 3a and 3b regardless of the position of the magnetic body 1, and the wheel 12 can be operated at any time. It is possible to start it even under circumstances.

The operation of the above-mentioned brushless DC motor for driving wheels will be described. When it is necessary to drive the wheels 12, first, a switch of a power source (not shown) is turned on, and a coil from a DC power source (not shown) is turned on. Electric power is supplied to 5a and 5b. As a result, both electromagnets 3a and 3b are excited at the same time to magnetically drive the magnetic body 1 in one direction, and the wheels also rotate in one direction accordingly.

FIG. 3 is a bicycle to which the brushless DC motor for driving wheels of the present invention is applied. The magnetic body 1 is fixedly arranged at an equal angle on the peripheral portion of the rear wheel 20 of the bicycle. Electromagnets 3a and 3b are fixed in proximity to the seat stay 21 of the bicycle. A battery (preferably a CADNICA battery) for supplying electric power to the electromagnets 3a and 3b is preferably arranged at any place, for example, below the saddle near the center of gravity of the bicycle. Here, the positional relationship between the magnetic body 1 and the electromagnets 3a and 3b is as shown in FIGS. 1 and 2, and therefore detailed description thereof is omitted here. The bicycle configured as described above normally moves forward by stepping on the pedal 22, but when climbing a steep hill, a great load is applied manually, so by activating the motor of the present invention, It enables comfortable driving.

The present invention is not limited to the above-described embodiment, but can be applied to toys as well as tricycles, four-wheeled vehicles, and practical vehicles, and by increasing the number of magnetic bodies and electromagnets, It goes without saying that the wheels can be driven more smoothly.

[0014]

[Effect of the device]

 Since the brushless DC motor for driving a wheel according to the present invention is configured as described above, the following effects can be obtained. That is, since the wheels with magnetic bodies arranged at equal intervals are directly driven by the electromagnets arranged close to the magnetic bodies, there is little mechanical loss, and the wheels can be driven with a simple structure and at low cost. You can

[Brief description of drawings]

FIG. 1 is a side view showing a brushless DC motor for driving wheels according to the present invention.

FIG. 2 is a front view showing a wheelless brushless DC motor of the present invention.

FIG. 3 is a front view of a brushless DC motor for driving wheels according to the present invention applied to a bicycle.

FIG. 4 is a side view showing a conventional brushless DC motor.

FIG. 5 is a front view showing a conventional brushless DC motor.

[Explanation of symbols]

 1 magnetic body 3a, 3b electromagnet 12 wheel

Claims (1)

[Scope of utility model registration request] 1. A wheel-driving brushless DC motor in which the magnetic body (1) is rotated by cooperation of the magnetic body (1) and electromagnets (3a, 3b). The wheels (12) made of a non-magnetic material are arranged at equal intervals along the circumference of the wheel (12), and the electromagnets (3a, 3)
b) is arranged in the vicinity of the magnetic body (1), the magnetic body (1) is magnetically driven, and the wheel (12) is rotated as the magnetic body (1) rotates. A characteristic brushless DC motor for driving wheels.