JPH09308651A - Motor-driven wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extremely simplify electric wiring and to eliminate trouble caused by contact defect, etc., with the disconnection/connection of electric wiring concerning a motor-driven wheelchair with which wheels can be attached/ detached to the main body of the wheelchair. SOLUTION: Concerning a motor-driven wheelchair 41 for which wheels 1 are arranged at a main body 42 of the wheelchair and an electric motor 45 for rotationally driving the wheels 1 is disposed, a rotor 44 equipped with a permanent magnetic 44a to be adjacently rotated on the outer peripheral side of a stator 43 equipped with a coil 43a as the electric connecting part of the electric motor 45 in the state of leaving the stator 43 on the side of the main body 42 of the wheelchair and the wheels 1 integrated with this rotor are made detachable/attachable to the main body 42 of the wheelchair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair suitable for use by persons with physical disabilities, elderly people, and other persons who have difficulty walking, and more particularly, it relates to a wheelchair that can be moved by an electric motor and is used for transportation. The present invention relates to an electric wheelchair excellent in portability.

[0002]

2. Description of the Related Art Wheelchairs are often used as a convenient means of transportation for people with physical disabilities and elderly people who have difficulty walking.

In the case of a manual type, there is a structure in which a hand-pushing handle is provided above the backrest portion, or a concentric hand-held handle slightly smaller than the wheel is provided. .

Further, in such a manual wheelchair, a caregiver is required when using the handwheel handle, and when using the handwheel handle, it is limited to the person who can utilize his / her physical strength. Many electric wheelchairs are also used so that only a person in a wheelchair can move by a simple lever operation.

On the other hand, in order to easily load such an electric wheelchair on the trunk of a passenger car or the rear part of a one-box car, there is a wheelchair body in which wheels can be detached and attached. Therefore, a wheelchair having a structure in which an electric motor is provided inside the boss of the wheel has been developed (for example, as an electric wheelchair, Japanese Patent Laid-Open No. 5-261).
There is a structure described in Japanese Patent Laid-Open No. Hei 7-96753 as a structure of a single wheel. ).

[0006]

However, in such a conventional electric wheelchair having a structure in which an electric motor is incorporated in the boss of a wheel, since the operation lever and the battery are provided on the wheelchair body side, Regarding the electric wiring for controlling the electric motor with the lever and operating the electric motor with the battery, it is necessary to have a mechanism for disconnecting and connecting these, for example, a structure such as a connector, so the wiring of the electric wiring is required. However, there is a problem in that there is a possibility that it may become complicated and contact failure may occur at the connector portion, and there is a problem to solve such a problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the wiring of electric wiring is remarkably simple even when the wheels can be detached and attached to the wheelchair body. It is also possible to disconnect the electric wiring between the operating lever, the battery and the electric motor when removing or installing the wheel.
It is intended to provide an electric wheelchair that does not involve connection.

[0008]

According to a first aspect of the present invention, there is provided an electric wheelchair having a wheel body provided with wheels and an electric motor for rotating the wheels. In the above, the electric motor is characterized in that at least an electric connection portion or all of the electric motor remains on the wheelchair body side so that the wheels can be detached and attached to the wheelchair body.

In the embodiment of the electric wheelchair according to the present invention, as described in claim 2, it is provided with a battery for driving the electric motor, and the battery can be detached and attached to the wheelchair body. It can be configured as described above.

Similarly, in the embodiment of the electric wheelchair according to the present invention, as described in claim 3, the wheelchair main body may be constructed so as to be foldable in a direction in which its width becomes narrow. it can.

An electric wheelchair according to one embodiment of the present invention is
According to a fourth aspect of the present invention, a wheel having a stator provided with a coil, which is an electric connection portion of an electric motor, and a rotor provided with a permanent magnet that rotates adjacent to the inside of the stator, are left on the wheelchair body side. Can be attached to and detached from the wheelchair body. In this embodiment, as described in claim 5, both the stator and the rotor of the electric motor are inside the wheelchair body. In this case, the left and right electric motors are provided with left and right electric motors for individually driving the left and right wheels, respectively. The wheelchair body may be configured to be foldable in a direction in which the width of the wheelchair becomes narrower when the wheels are lined up adjacent to each other on each end face side or each side face side. Kill.

According to another aspect of the present invention, there is provided an electric wheelchair, wherein a stator provided with a coil which is an electric connection portion of an electric motor and an outer peripheral side of the stator are adjacently rotated. With the rotor having permanent magnets that remain on the wheelchair body side, the wheels can be detached from and attached to the wheelchair body. In this embodiment, the wheel can be removed. As described above, both the stator and the rotor of the electric motor may be provided outside the wheelchair body.

In an electric wheelchair according to still another embodiment of the present invention, as described in claim 9, the stator having a coil which is an electric connection portion of the electric motor remains in the wheelchair main body side. A rotor having permanent magnets that rotate adjacent to each other on the side surface of the wheel and a wheel integrated with the rotor can be detachable / attachable to / from the wheelchair body. In this case, in claim 10, As noted, the stator and rotor of the electric motor may both be provided on the outside of the wheelchair body.

According to still another embodiment of the present invention, there is provided an electric wheelchair, wherein a stator having a coil which is an electric connection portion of an electric motor is left on the wheelchair body side. A rotor having permanent magnets that rotate adjacent to each other on the outer peripheral side of the wheel and a wheel integrated with the rotor can be configured to be detachable and attachable to the wheelchair body. In this case,
As described in claim 12, both the stator and the rotor of the electric motor may be provided outside the wheelchair body.

[0015]

Embodiments of the electric wheelchair according to the present invention will be described below in detail with reference to the drawings.

Embodiment 1 FIG. 1 is a diagram showing a basic construction of a wheel detachable / attachable portion of an electric wheelchair according to a first embodiment of the present invention, particularly a wheelchair body. Inside the wheelchair body 12, there is provided a stator 13 provided with a coil 13a which is an electrical connection portion, and a rotor 14 provided inside the stator 13 and provided with a permanent magnet 14a at a slight distance from the inside of the stator 13. An electric motor 15 is provided.

In this case, the stator 13 is fixed to the wheelchair body 12 via the motor frame 15a, and the rotor 14 rotates about a rotating shaft 14d rotatably supported by bearings 12c and 12d. The stator 13 and the rotor 14 are both provided inside the wheelchair body 12.

Further, a shaft engaging portion 14e is formed at an end portion on the left side of the rotary shaft 14d in the drawing, which is provided on the boss 1a of the wheel 1 having the boss 1a, the spokes 1b and a tire (not shown) and the bearing 12e. The shaft locking portion 1e of the rotating shaft 1d and the shaft locking portion 14e of the rotating shaft 14d, which are rotatably supported by, can be locked / disengaged.

It is needless to say that the electric motor 15 may be provided with an appropriate speed reducing mechanism that is a combination of planetary gears and the like.

In such a structure, the electric wheelchair 1
When 1 is used, the shaft locking portion 1e formed on the rotary shaft 1d provided on the boss 1a of the wheel 1 and the shaft locking portion 14e formed on the rotary shaft 14d of the electric motor 15 are locked to each other. The wheel 1 is attached to the wheelchair body 11 as.

After the two wheels 1 have been attached, when the coil 13a of the stator 13 of the electric motor 15 is energized by operating an operating lever (not shown), the rotor 14 having the permanent magnet 14a and the rotating shaft 14d are moved. The rotation is transmitted to the rotation shaft 14d of the boss 1a via the shaft locking portions 14e and 1e, and the wheel 1 rotates, so that the electric wheelchair 11 starts to move.

On the other hand, when the electric wheelchair 11 is to be housed in the trunk of a passenger car or the rear part of a one-box car, the wheel 1 is removed from the wheelchair body 12 and the rotating shaft 14d of the electric motor 15 is connected to the boss 1a of the wheel 1. The wheel 1 on the opposite side (not shown) is detached from the wheelchair body 12 by detaching the rotating shaft 1d provided on the wheelchair body. Further, when the battery can be detached and attached to the wheelchair body 12, the battery is also detached as necessary. The wheelchair body 12 is folded in the direction in which its width becomes narrow.

When the wheelchair body 12 is folded, the left and right electric motors 15, 15 are arranged adjacent to each other on the side surface side (or the outer peripheral surface side), so that the wheelchair body 12 The width after folding can be made close to the width of one electric motor 15 and becomes smaller.

Embodiment 2 FIG. 2 is a diagram showing a basic construction of a wheel detaching / attaching portion of an electric wheelchair according to a second embodiment of the present invention, particularly a wheelchair body. The wheelchair body 22 has a stator 23 having a coil 23a which is an electrical connection portion, and a rotor 24 having an outer peripheral side of the stator 23 and a permanent magnet 24a at a slight distance from the outer peripheral side of the stator 23. An electric motor 25 is provided.

In this case, the stator 23 has bolts 23b.
The rotor 24 is fixed to the wheelchair main body 22 via a bearing, and the rotor 24 rotates about a rotation shaft 24d rotatably supported by the wheelchair body 22 via a bearing 22d provided on the wheelchair body 22. The stator 23 and the rotor 24 are both provided outside the wheelchair body 22.

Further, the wheel 1 having the boss 1a, the spokes 1b and a tire (not shown) can be detached and attached between the inner peripheral side of the boss 1a and the outer peripheral side of the rotor 24.

Needless to say, the electric motor 25 may include an appropriate speed reducing mechanism using a planetary gear or the like.

In such a structure, the electric wheelchair 2
1 is used, the stator 23 of the electric motor 25
While the rotor 24 is attached to the wheelchair main body 22 side, the inner peripheral side of the boss 1a of the wheel 1 is fitted to the outer peripheral side of the rotor 24 of the electric motor 25.

After the two wheels 1 have been attached, when the coil 23a of the stator 23 of the electric motor 25 is energized by an operating lever (not shown), the permanent magnet 24
The electric wheelchair 21 starts to move by the rotation of the rotor 24 provided with a and the wheel 1 around the rotation shaft 24d.

On the other hand, when the electric wheelchair 21 is housed in the trunk of a passenger car or the rear of a one-box car, the inner peripheral side of the boss 1a of the wheel 1 is pulled out from the outer peripheral side of the rotor 24 and the stator 23 and the rotor. With the wheelchair body 22 left on the wheelchair body 22 side,
The wheel 1 on the opposite side (not shown) is also removed from the wheelchair body 22 in the same manner. Further, when the battery can be removed / attached to the wheelchair body 22, the battery is removed as necessary. 22 is folded so that its width becomes narrower.

Embodiment 3 FIG. 3 is a diagram showing a basic construction of a wheel detachable / attachable portion of an electric wheelchair according to a third embodiment of the present invention, particularly a wheelchair body. The wheelchair main body 32 has a stator 33 having a coil 33a which is an electrical connection portion, and a rotor 34 having a permanent magnet 34a on a side surface of the stator 33 at a slight distance from a side surface of the stator 33. A motor 35 is provided.

In this case, the stator 33 has bolts 33b.
The rotor 34 is fixed to the wheelchair main body 32 via a bearing, and the rotor 34 rotates about a rotation shaft 34d rotatably supported by the wheelchair body 32 via a bearing 32d provided on the wheelchair body 32. The stop ring 37 is provided at the tip of the rotary shaft 34d, and the stator 33 and the rotor 34 are both provided outside the wheelchair body 32.

The wheel 1 having the boss 1a, the spokes 1b, and the tire (not shown) is fitted and fixed on the inner peripheral side of the boss 1a and the outer peripheral side of the rotor 34.

The electric motor 35 may of course be provided with a suitable speed reducing mechanism using a planetary gear or the like.

In such a structure, the electric wheelchair 3
1 is used, the stator 33 of the electric motor 35
Bearing 32d in which the rotating shaft 34d is provided on the wheelchair body 32 when the wheelchair body 32 is attached to the wheelchair body 32 side.
The permanent magnet 34a of the rotor 34 into the stator 3
The wheel 1 is brought into a rotatable state with respect to the wheelchair main body 32 while being brought close to the side surface of the coil 33a of No. 3 and the tip end portion of the rotating shaft 34d is stopped by the stop ring 37 in this state.

After the two wheels 1 have been attached, the coil 33a of the electric motor 35 is energized by an operation lever (not shown), so that the rotor 34 having the permanent magnet 34a and the wheel 1 are centered around the rotation shaft 34d. The rotation of the electric wheelchair 31 starts the rotation.

On the other hand, when the electric wheelchair 31 is to be housed in the trunk of a passenger car or the rear part of a one-box car, the stop ring 37, which is locked at the tip of the rotary shaft 34d, is removed, and the wheelchair main body 32 is removed. Provided bearing 32d
By pulling out the rotation shaft 34d together with the wheel 1 and the rotor 34 from the wheelchair body 32, the rotor 34 and the wheel 1 are removed from the wheelchair body 32, and the wheel 1 on the opposite side (not shown) is similarly processed. The wheelchair body 32 is detached from the wheelchair body 32, and when the battery is detachable and attachable to the wheelchair body 32, the battery is also detached if necessary, and the wheelchair body 32 is folded in a direction in which its width becomes narrow. To do.

Fourth Embodiment FIG. 4 is a diagram showing the basic construction of the wheel detachable / attachable portion of the wheelchair body of the electric wheelchair according to the fourth embodiment of the present invention. The wheelchair body 42 has a stator 43 having a coil 43a which is an electrical connection portion, and a rotor 44 having a permanent magnet 44a on the outer peripheral surface side of the stator 43 at a slight distance from the outer peripheral surface of the stator 43. An electric motor 45 is provided.

In this case, the stator 43 is the bolt 43b.
The rotor 44 is fixed to the wheelchair main body 42 via a bearing, and the rotor 44 rotates about a rotary shaft 44d rotatably supported by the wheelchair main body 42 via a bearing 42d provided on the wheelchair main body 42. A stop ring 47 is provided at the tip of the rotary shaft 44d, and the stator 43 and the rotor 44 are both provided outside the wheelchair body 42.

The wheel 1 having the boss 1a, the spokes 1b, and a tire (not shown) is fitted and fixed on the inner peripheral side of the boss 1a and the outer peripheral side of the rotor 44.

It goes without saying that the electric motor 45 may be provided with an appropriate speed reducing mechanism in which a gear train is formed by using a planetary gear or the like.

In such a structure, the electric wheelchair 4
1 is used, the stator 43 of the electric motor 45
Bearing mounted on the wheelchair body 42 with the rotary shaft 44d attached to the wheelchair body 42 side.
The permanent magnet 44a of the rotor 44 into the stator 4
3 is located near the outer periphery of the wheelchair main body 42
To be rotatable relative to the rotary shaft 44d.
Stop the tip of the with a stop ring 47.

After the two wheels 1 have been attached, the coil 43a of the electric motor 45 is energized by an operating lever (not shown), so that the rotor 44 having the permanent magnet 44a and the wheel 1 are centered around the rotation shaft 44d. The electric wheelchair 41 starts moving by rotating.

On the other hand, when the electric wheelchair 41 is to be housed in the trunk of a passenger car or the rear part of a one-box car, the stop ring 47 that is locked at the tip of the rotary shaft 44d is removed and the wheelchair body 42 is mounted. Provided bearing 42d
By pulling out the rotation shaft 44d together with the wheel 1 and the rotor 44 from the wheel, the rotor 43 and the wheel 1 are removed from the wheelchair body 42 while leaving the stator 43 on the wheelchair body 42 side, and the wheel 1 on the opposite side (not shown) is similarly processed. The wheelchair body 42 is detached from the wheelchair body 42, and when the battery is detachable and attachable to the wheelchair body 42, the battery is also detached as necessary, and the wheelchair body 42 is folded in a direction in which the width becomes narrower. To do.

FIG. 5 shows the wheelchair body 12, 22, 32, 42.
Fig. 2 shows an example of a form in which a front wheel link is formed by two front links 51, 52, left and right side links 53, 54, and two rear links 55, 56. It is assumed that the electric motors 15 and 15 are provided inside the wheelchair body 12 in the case illustrated in the first embodiment substantially in the middle of the side links 53 and 54.

When folding the wheelchair body 12, as shown in FIG. 5B, the two electric motors 15,
15 in a state where the end faces are adjacent to each other, or as shown in FIG.
As shown in FIG. 2, the two electric motors 15 and 15 can be in a state of being adjacent to each other on their side surfaces, but these are merely examples.

[0047]

As described in claim 1, the electric wheelchair according to the present invention is an electric wheelchair having a wheel in the wheelchair body and an electric motor for rotating the wheel. Among them, at least the electric connection part remains in the wheelchair body side so that the wheel can be detached and attached to the wheelchair body. Since the electric wiring is only required on the side of the wheelchair body, it is possible to make the wiring of the electric wiring extremely simple, and at the same time, the operation lever, the battery, and the electric motor can be used when the wheel is removed or attached. There is no need to disconnect or connect the electrical wiring between the Leads to significantly better effect that it is possible to assume no well as problems due, etc.).

Then, as described in claim 2,
By providing a battery that drives the electric motor, and the battery being removable and attachable to the wheelchair body, handling and portability have been significantly improved due to the distribution of heavy objects, and also when charging the battery. The handling property of is also good.

Further, as described in claim 3,
By making the wheelchair body foldable in a direction in which its width becomes narrower, it is possible to easily fit the wheelchair into the trunk of a passenger car or the rear part of a one-bock car, and to achieve a remarkably excellent effect that a required volume is small. .

And in one embodiment, claim 4
As described in (1), the wheel having a wheelchair body with the stator having a coil, which is an electric connection portion of the electric motor, and the rotor having a permanent magnet that rotates adjacent to the inside of the stator adjoining each other remains on the wheelchair body side. The object of the present application is achieved by making it detachable and attachable to the wheelchair, and in this case, the stator and rotor of the electric motor are both provided inside the wheelchair body as described in claim 5. In addition to the above, it is possible to make the wheel that can be detached lightweight.

Further, as described in claim 6, the wheelchair body is provided with left and right electric motors for individually driving the left and right wheels, and the left and right electric motors are arranged adjacent to each other. By being foldable in the direction of narrowing the width, it is possible to remarkably improve the accommodation of the wheelchair body.

In yet another embodiment, claim 7
As described in (1), the wheel is wheelchair-mounted so that both the stator having a coil that is an electric connection part of the electric motor and the rotor having a permanent magnet that rotates adjacently on the outer peripheral side of the stator remain on the wheelchair body side. The present invention can be detached and attached to the main body, and in this case, the stator and the rotor of the electric motor are both provided outside the wheelchair body as described in claim 8. It is possible to achieve the purpose of, and because the electric motor can be incorporated by using the boss of the wheel, it is possible to simplify the mechanism and reduce the weight of the removable wheel. The remarkable effect is that it can be

In yet another embodiment, claim 9
As described in (1), a rotor provided with a permanent magnet that rotates adjacently on the side surface of the stator while the stator provided with a coil that is an electric connection portion of the electric motor remains on the wheelchair body side, and a rotor integrated with this rotor. Wheels can be removed and attached to the wheelchair body, in this case,
As described in claim 10, it is possible to achieve the object of the present invention by providing both the stator and the rotor of the electric motor on the outside of the wheelchair body, and at the same time, the electric motor can be achieved. Since the wheel can be installed by using the boss of the wheel, the mechanism can be simplified, and the removable wheel can be integrated into the stator of the electric motor simply by integrating the rotor of the electric motor. Since the electric motor is not included, it is possible to make the electric motor lighter in weight as compared with the case where the whole electric motor is incorporated in the boss portion of the wheel.

In yet another embodiment, claim 1
As described in 1, a rotor provided with a permanent magnet that rotates adjacently on the outer peripheral side of the stator in a state where the stator provided with a coil that is an electric connection portion of the electric motor remains on the wheelchair body side, and this rotor The integral wheel can be detached and attached to the wheelchair body, and in this case, as described in claim 12, both the stator and the rotor of the electric motor are provided outside the wheelchair body. Also, the object of the present invention can be achieved, and since the electric motor can be incorporated by utilizing the boss portion of the wheel, simplification of the mechanism can be realized and the electric motor can be removed. Since the wheel does not include the rotor of the electric motor but does not include the stator of the electric motor, the entire electric motor is Significantly excellent effect that it is possible to more light weight than those incorporated in the section is provided.

[Brief description of drawings]

FIG. 1 is an explanatory view of essential parts showing a drive part and a wheel boss part of an electric wheelchair according to a first embodiment of the present invention.

FIG. 2 is an explanatory view of essential parts showing a drive portion and a wheel boss portion of an electric wheelchair according to a second embodiment of the present invention.

FIG. 3 is a main part explanatory view showing a drive part and a wheel boss part of an electric wheelchair according to a third embodiment of the present invention.

FIG. 4 is a main part explanatory view showing a drive portion and a wheel boss portion of an electric wheelchair according to a fourth embodiment of the present invention.

FIG. 5 (A) is a basic explanatory view illustrating the configuration of the frame portion of the wheelchair main body of the electric wheelchair according to the present invention, and FIGS. 5 (B) and (C) are explanatory views showing two types of folding. is there.

[Explanation of symbols]

1 Wheel 1a Wheel Boss 1b Wheel Spokes 11, 21, 31, 41 Electric Wheelchair 12, 22, 32, 42 Wheelchair Body 13, 23, 33, 43 Stator 13a, 23a, 33a, 43a Stator Coil (Electrical Connection Portion) 14, 24, 34, 44 rotor 14a, 24a, 34a, 44a permanent magnet of rotor 15, 25, 35, 45 electric motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuya Endo 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Fumio Ueda 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. Within the corporation

Claims (12)

[Claims] 1. In an electric wheelchair having a wheelchair body with wheels and an electric motor for rotating the wheels, at least the electric connection portion of the electric motor remains on the wheelchair body side, and the wheels are attached to the wheelchair body. Electric wheelchair characterized by being removable and attachable. 2. The electric wheelchair according to claim 1, further comprising a battery for driving the electric motor, the battery being detachable and attachable to the wheelchair body. 3. The electric wheelchair according to claim 1, wherein the wheelchair body is foldable in a direction in which the width of the wheelchair becomes narrower. 4. A wheel with respect to a wheelchair body in a state in which both a stator having a coil that is an electrical connection portion of an electric motor and a rotor having a permanent magnet that rotates adjacently inside the stator remain on the wheelchair body side. The electric wheelchair according to any one of claims 1 to 3, which is removable and attachable. 5. The electric wheelchair according to claim 4, wherein both the stator and the rotor of the electric motor are provided inside the wheelchair body. 6. A wheelchair body is provided with left and right electric motors for individually driving the left and right wheels, respectively, and the wheelchair body is foldable in a direction in which the width of the wheelchair becomes narrower in a state where the left and right electric motors are arranged adjacent to each other. The electric wheelchair according to claim 5. 7. A wheel with respect to a wheelchair body in a state where both a stator having a coil which is an electric connection portion of an electric motor and a rotor having a permanent magnet rotating adjacently on the outer peripheral side of the stator remain on the wheelchair body side. Remove
4. The device according to claim 1, wherein the device is attachable.
An electric wheelchair according to any one of 1. 8. The electric wheelchair according to claim 7, wherein both the stator and the rotor of the electric motor are provided outside the wheelchair body. 9. A wheelchair comprising a rotor provided with a permanent magnet that rotates adjacent to the side surface of the stator and a wheel integrated with the rotor while the stator having a coil that is an electrical connection portion of an electric motor remains on the wheelchair body side. The electric wheelchair according to any one of claims 1 to 3, wherein the electric wheelchair is detachable and attachable to the main body. 10. The electric wheelchair according to claim 9, wherein both the stator and the rotor of the electric motor are provided outside the wheelchair body. 11. A rotor provided with a permanent magnet that rotates adjacently on the outer peripheral side of the stator while the stator provided with a coil, which is an electric connection portion of an electric motor, remains on the wheelchair body side, and a wheel integrated with the rotor. The electric wheelchair according to any one of claims 1 to 3, which is detachable and attachable to the wheelchair body. 12. The electric wheelchair according to claim 11, wherein both the stator and the rotor of the electric motor are provided outside the wheelchair body.