JPH082264A - Electric wheel and direct driving method by induction electromagnetic force thereof - Google Patents

Abstract

PURPOSE: To easily rotate a wheel with external force by providing a rotor in the rim of the wheel, providing a stator and a brake member on a wheel shaft, controlling the brake member to a release state when a current is interrupted, and applying the magnetic force of a permanent magnet to the stator and the rotor. CONSTITUTION: A rotor 3 is fixed in the rim 6 of a wheel, a stator 2 is provided on a wheel shaft 5 in the wheel, and one of the stator 2 and the rotor 3 has a coil 4. The coil 4 is excited through a power supply 41, and the induction electric field is generated to rotate the rotor 3, i.e., the wheel. A brake member 8 is fixed on the wheel shaft 5, and the brake member 8 is controlled by a clutch switch 9 to brake the stator 2 or to release the stator 2. The brake member 8 is normally set to the state for braking the stator 2 to relatively rotate the rotor 3, and the rim 11 is rotated around the wheel shaft 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a type of electric wheel, and more particularly to a method and apparatus for causing an electric wheel to smoothly rotate by thrust even when current is interrupted.

[0002]

2. Description of the Related Art Electric wheelchairs have already been designed so that a person with a disability in the legs can more conveniently act in a wheelchair. Currently, various designs of electric wheelchairs are in the state of development, and methodically, a motor and a battery, and a switch for controlling the supply of the electric current of the battery to the motor are provided on the support frame of the wheelchair, and the output shaft of the motor is provided. The wheels are driven by. In some electric wheelchairs, the output shaft of the electric motor is first transmitted to a wheel through a simple speed reducing mechanism. For the current traditional electric wheels, regardless of the power of the output shaft of the electric motor, the shafts of the wheels are driven directly or indirectly after first through a reduction mechanism. This made it difficult to drive an electric wheelchair when the battery electricity was exhausted.

The rotation of the output shaft of the electric motor is driven by the change of the induction electromagnetic force formed between the stator and the rotor in the electric motor. When the motor cannot get current, it does not rotate. At this time, even if an attempt is made to rotate the motor output shaft by an external force, this is very difficult. Because there is a permanent magnet attraction between the stator and rotor in the electric motor, it prevents relative rotation between the stator and rotor, and the wheelchair of the electric wheelchair is connected to the output shaft of the electric motor. This is because the wheel axle of the electric wheelchair is also difficult to rotate when the vehicle does not rotate easily.

In addition, as well known in this type of conventional technique, there is generally a reduction gear mechanism having one input shaft and at least one output shaft, and this has an output shaft by an input shaft. It is driven and labor-saving. However, with this conventional technique, if it is attempted to drive the input shaft by the output shaft, on the contrary, it will be very force consuming and difficult. Taking this technology as an example, a structure in which a speed reducing mechanism is indirectly transmitted as a structure in which an electric wheelchair is transmitted to an electric motor is taken as an example.When the electric motor stops rotating, the user propels the wheelchair. When trying
It will be very power intensive. In such a situation, in addition to the electric wheelchair, products driven by an electric motor, such as an electric bicycle, a motorcycle, an electric vehicle,
Or, it usually occurs in products similar to these.

[0005]

As can be seen from the above, the rim of the electric wheel can be rotated when the electric current is interrupted or when the electric motor is not rotated, and is not blocked by the magnetic force of the permanent magnet in the stator or the rotor. Is the problem to be solved.

Therefore, the present invention is to provide a kind of method for directly driving a wheel by an electromagnetic force and a device therefor. When a current is obtained, the wheel can be driven, and in particular, the current is stopped. It is an object of the present invention to provide a method capable of rotating a wheel around a wheel axis even at times.

[0007]

SUMMARY OF THE INVENTION According to the present invention, one stator and one rotor are provided in a wheel, and an induction electromagnetic force is generated after a current is supplied between them, and at the same time, a hollow wheel shaft rotates in a rim. Is fixed to the periphery of the wheel, the stator is connected to the wheel shaft by a bearing, and one brake member is provided on the wheel shaft. Further, one clutch switch is provided to control whether the brake member holds the first position or the second position, and when the brake switch is in the first position, the stator that is coupled to the wheel shaft is prevented from rotating. To do.
Further, when in the second position, a relatively released state is exhibited, and in this released state, the stator and the rotor can be rotated simultaneously.

[0008]

According to the electric wheel of the present invention and the direct driving method using the induction electromagnetic force thereof, when the electric motor is not rotating, the rim is propelled and rotated by an external force, and when the electric motor is rotated, the attractive force of the magnetic field between the stator or the rotor is attracted. The wheel can be rotated smoothly without being hindered by

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides a method for directly driving an electric wheel by an inductive electromagnetic force so that the wheel rim can be lightly propelled even when power is interrupted. The method includes the following steps: (a) a stator; Install the rotor in the wheel; (b) supply current to one of the stator and rotor to generate an induction electromagnetic force between them; (c) rotor on the inner circumference of the rim on which the hollow wheel shaft rotates. Generally, the outer periphery of the rim supports the tire; (d) the bearing member and the brake member are installed on the wheel shaft; (e) the stator is provided on the bearing member; (f) A clutch switch is provided to operate and control the brake member to reciprocate between a first position and a second position, and the brake member is held at one of these two positions; ) The brake member is in the first position When lifting, braking the stator by the brake member; a more steps.

In the above method, when the installed rotor is made more permanent magnet, the stator has a coil (4). The opposite is true. 1 and 3 show two different embodiments. Bearings are provided on the wheel shafts on both sides of the rim. Alternatively, a sealing cap is provided to seal the outside of the bearing to protect it from dust. Also, among the techniques used in the examples, there is a well-known technique, that is, a magnetic field is formed by a permanent magnet, an electric field is generated after a current is applied to a coil, and then an electromagnetic field formed between them is generated. A technique of moving a rotor by force is used (in the present invention, the rotor is caused to perform a rotary motion). Since this technology is well known as described above, detailed description thereof will be omitted here.

In the embodiment of FIG. 1, the current is supplied via an electric brush to a stator (2) which is connected to the wheel axle and produces an induced electromagnetic force with the rotor (3). However, this technique is well known. As shown in FIG. 3, the coil may be provided on the rotor in the rim (6). Further, the electric current sent by the electric wire through the electric brush is applied to the rotor (3).
However, since this is also a well-known technique, detailed description will be omitted here.

With regard to the technical device of the invention, the rotor (3) is fixed in the rim of the wheel and the stator (2) is provided on the wheel axle in the wheel. Further, either the stator or the rotor has a coil. The power supply (41) may supply a current to the coil (4) to generate an induction electric field, and may supply a current to the coil (4) by a method such as conducting directly through a bearing. Bearings are provided on the wheel axle (5) on both sides of the rim which rotates around the aforementioned hollow wheel axle (5).

The device in which the stator (2) and the wheel shaft (5) are combined is provided on the wheel shaft (5) and is used for mounting the stator (2) on the wheel shaft (5). (7) and a brake member (8) fixed on the wheel shaft (5). The brake member (8) is operated and controlled by one clutch switch (9) and holds the first position to brake the stator (2) or holds the second position to release the stator (2). To do. The brake member (8) shown in the figure is one brake drum, but if it is changed to a disc brake or other parts having a brake mechanism, the need of the present invention can be satisfied. .

The feature of the above-mentioned device is that the brake member (8) is used.
It is always to hold the first position to brake the stator (2), thereby obtaining electric current, and when the induction electromagnetic force is generated, the stator (2) is braked by the brake member (8) to rotate. Instead, it causes the rotor (3) to rotate relative to one another, causing the rim to rotate about the wheel axle (5). However, when the current is interrupted, the clutch switch (9) is operated and controlled to the second position shown by the phantom line in FIG. 1, and the brake member (8) is released as shown by the phantom line in FIG. , The brake piece (81) is disengaged from the inner wall (21) of the stator (2). As a result, the stator (2) and the rotor (3) are attracted to each other by the attractive force of the permanent magnet, and the stator (2) is supported by the bearing member (7) at the location at this time and rotates together with the rotor (3). Ready to go. As a result, even if the rim (6) is propelled, it is no longer subjected to resistance due to the attractive force of the permanent magnets, that is, the rim (6) smoothly rotates on the wheel shaft (5).

[0015]

The electric wheel constructed by the above-mentioned device can be applied to wheels of electric wheelchairs, electric bicycles, electric vehicles, and other similar articles. The present invention can be mounted directly on the drive wheel in the wheel,
Further, unlike the conventional method, it is not necessary to drive by a separately installed electric motor. In addition, even when the current is interrupted, the wheels can be smoothly propelled, which improves the drawback that the conventional electric wheels were difficult to be propelled when the current was interrupted.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a cross-sectional view of another embodiment of the present invention.

[Explanation of symbols]

(2) Stator (3) Rotor (4) Coil
(5) Wheel shaft (6) Rim (7) Bearing member (8) Brake member (9) Clutch switch (21) Inner wall (4)
1) Power supply (81) Brake piece

Claims (4)

[Claims] 1. An electric wheel including: a stator installed on a hollow wheel shaft in a wheel; and a rotor fixed in a rim of the wheel, wherein a coil is provided on one of the stator and the rotor. Further, the electric wheel includes a power supply that supplies an electric current to the coil to generate an electromagnetic force between the stator and the rotor, the wheel shaft is fixed and non-rotating, and the rim is An electromagnetic force generated between the stator and the rotor causes the wheel shaft to rotate, the stator and the wheel shaft are coupled, and the coupling device is fixed on the wheel shaft, and the stator is coupled to the wheel shaft. A bearing member provided on the wheel shaft and fixed on the wheel shaft, the first position is held by the operation control of one clutch switch to brake the stator so as not to rotate, or the second position is held to hold the stator. Release the brakes An electric wheel including a member. 2. A stator and a rotor are installed in a wheel, an electric current is supplied to one of the stator and the rotor, an induction electromagnetic force is generated between them, and an inner circumference of a rim around which a hollow wheel shaft rotates. The rotor is fixed, the bearing member and the brake member are installed on the wheel shaft, the stator is provided on the bearing member, and one clutch switch is provided to operate and control the brake member. To and from
The brake member is held in one of these two positions, and when the brake member holds the first position, the stator brakes the stator by the brake member. The direct drive method that can drive the rim of the vehicle by the induction electromagnetic force of the electric wheel. 3. The direct driving method according to claim 2, wherein the stator is provided with a coil. 4. The direct driving method according to claim 2, wherein the rotor is provided with a coil.