JP2000325404A - Electric wheelchair - Google Patents

Abstract

(57) Abstract: An electric wheelchair capable of reducing an occupied space when not used with a drive motor and a battery attached. The drive motor is arranged so that the axes thereof are shifted from each other when viewed from the side of the rear wheel, and gears are provided on the rotation shaft of the rear wheel and the drive motor to rotate the drive motor. And a fixing tool 21 for supporting the drive motor 13 is attached to the frame 1 of the wheelchair for supporting the axle 12 of the rear wheel 2 on the side where the drive motor 13 is driven.
To place a part of. [Effect] Since the electric wheelchair can be folded, there is an effect that a large number of electric wheelchairs can be placed in a small area in a folded state in a hospital or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wheelchair driven by a motor.

[0002]

2. Description of the Related Art Conventional wheelchairs rely exclusively on manual running. There are two types of manual wheelchairs: self-operated vehicles that run on their own by pushing and turning the rear wheel by hand, and assisted vehicles that are manually pushed by an assistant.However, self-operated vehicles require the user's own strength to run. Therefore, in hospitals and the like, assistance traveling is mainly performed by the latter assistance person.

[0003] Therefore, when a user who has difficulty traveling by himself / herself tries to travel by himself without assistance, it is necessary to rely on an electric wheelchair. However, the conventional electric wheelchair has the following problems. there were.

[0004] As a prior art which discloses an electric wheelchair, a technique described in Japanese Patent Application Laid-Open No. Hei 6-14963 is known. This publication describes an electric wheelchair which has a motor for driving rear wheels and a motor for driving front wheels, and is equipped with a battery for supplying electric power to these motors.

[0005]

However, the above prior art has the following problems. In order to be used by many users in hospitals and other buildings, they are placed side by side in the lobby, etc., but the storage space for electric wheelchairs per car is too large, so if you try to increase the number, you will need to increase the storage space. On the contrary, there is a problem that it is not possible to install a large number of units when trying to store them in a fixed space.

[0006] Further, when using this kind of electric wheelchair at home, there is a case where the electric wheelchair and the user of the electric wheelchair are put on a private car and go out. When the electric wheelchair is large as described above, there is also a problem that there is no space for mounting the electric wheelchair on a private vehicle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electric wheelchair in which the space when the electric wheelchair is not used is reduced.

[0008]

The object is to provide a right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor for driving the right rear wheel, and a motor for driving the left rear wheel. This is achieved by providing a mechanism for folding an electric wheelchair in a direction to reduce the distance between the right rear wheel and the left rear wheel.

The object is to provide an electric wheelchair including a right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor driving the right rear wheel, and a motor driving the left rear wheel. A mechanism that folds the right rear wheel and the left rear wheel in a direction in which the distance between the right wheel and the left rear wheel is reduced. When the electric wheelchair is folded, the drive motors are displaced from each other when viewed from the rear wheel side so that the drive motors do not hit each other. This is achieved by positioning.

[0010] The object is to provide a right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor for driving the right rear wheel, a motor for driving the left rear wheel, and an electric power for these drive motors. An electric wheelchair provided with a battery for supplying the right and left rear wheels, a drive motor for driving one rear wheel in a radial direction of the rear wheel, comprising a mechanism for folding in a direction to reduce a distance between the right rear wheel and the left rear wheel. Disposing the battery at an interval, and attaching the other drive motor such that when the electric wheelchair is folded, the other drive motor is housed between the one drive motor and the battery. Achieved by

A control box containing a control device for controlling the rotation of the drive motor is provided. This control box is arranged on a frame supporting the axle of one rear wheel, and when the wheelchair is folded, the drive motor is closed. The control box may be arranged at a position where the control box does not collide with the battery.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an electric wheelchair showing one embodiment of the present invention, FIG. 2 is a plan view of the electric wheelchair according to the present embodiment viewed from behind, and FIG. It is the top view which looked at the electric wheelchair which concerns on a form from the back in the folded state. 2 and 3, illustration of front wheels and footrests is omitted. The description of the electric cord is omitted in FIGS. 1 to 3.

An embodiment will be described below with reference to FIGS. A rear wheel 2 and a front wheel 3 having a smaller diameter than the rear wheel 2 are attached to each of the left and right sides of the frame 1 of the electric wheelchair. The rear wheel 2 and the front wheel 3 are formed so as to rotate independently. 4 is an armrest.

An X-shaped brace 5 and an auxiliary fitting 6 are attached to a frame 1 of the electric wheelchair. This X
By pulling up the sheet pipe 7, the character-shaped brace 5 is brought into a state of being crushed right and left around a point at which the X-shaped brace 5 intersects as a fulcrum. Accordingly, the distance between the left and right wheels is reduced by shortening the distance between the left and right frames. As a result, the wheelchair is folded from the state shown in FIG. 2 to the state shown in FIG.

A back seat 8 is stretched between the backs of the left and right frames 1. The back sheet 8 is made of a flexible material such as cloth, leather, artificial leather, or a plastic sheet so as not to obstruct folding when the electric wheelchair is folded. The seat 9 is composed of left and right seat pipes 7.
, And a flexible material similar to the back sheet 8 is used. 10 is a footrest. Numeral 11 denotes a hand grip for the caregiver to push when the battery is exhausted or for other carrying.

The axles 12 of the rear wheels 2 are attached to a part of the frame 1 near the respective rear wheels 2 are arranged. Drive motors 13 for independently driving the left and right (pair) of rear wheels 2 are independently disposed near the respective axles 12 of the rear wheels 2. The axes of the drive motors 13 are mounted at positions shifted from each other when viewed from the rear wheel side surface. As shown in FIG. 3, when the wheelchair is folded, the drive motors 13 are arranged so as not to collide with each other. I have.

A gear is provided on the rear wheel 2, and another gear 15 is provided on a rotation shaft of the drive motor 13.
The two gears 14 and 15 are arranged at positions where they mesh with each other, and are formed so that when the rotation shaft of the drive motor 13 rotates, the rotation is transmitted to the rear wheel 2.

Reference numeral 16 denotes a battery, which is provided for supplying electric power to the drive motor 13. The battery 16 is disposed on a part of the frame 1 of the wheelchair that supports the axle 12 of one of the rear wheels 2, and has a mounting plate 17 and a bolt 18.
To the frame 1. The battery 16
Are arranged at positions where they do not collide with the drive motor 13 when the wheelchair is folded. As shown in FIGS. 2 and 3, the frame 1 immediately below the lower left end of the back seat 8
And a battery 16 is mounted on the frame 1 with an interval below the left drive motor 13. Right drive motor 1
3 is a left driving motor 1 when the electric wheelchair is folded.
It is attached to the right frame 1 so as to be located between the battery 3 and the battery 16.

Control box 1 for controlling operation of drive motor 13
Numeral 9 is arranged on a part of the frame 1 of the wheelchair that supports the axle 12 of one of the rear wheels 2, and is fixed to the frame 1 by a mounting plate (not shown) and bolts (not shown). The control box 19 is disposed at a position where the control box 19 does not hit the drive motor 13 and the battery 16 when the wheelchair is folded. Reference numeral 20 denotes a wheelchair control device.

FIG. 4 is a perspective view showing a state in which the drive motor 13 is mounted on the frame 1. In FIG. 4, the drive motor 13 is fixed to a fixture 21 by bolts 22. The fixture 21 is arranged on a part of the frame 1 of the wheelchair that supports the axle 12 of the rear wheel 2 on the side where the drive motor 13 is driven, and is fixed to the frame 1 by bolts 23. The gear 14 is provided at a distal end portion of a rotation shaft (not shown) of the drive motor 13 that is arranged to penetrate the fixed plate 21.

According to the present embodiment, the electric wheelchair can be folded with the drive motor 13 and the battery 16 attached. Therefore, even when the electric wheelchair is placed in a lobby or the like in a hospital or the like, it can be placed side by side in a folded state and one unit can be placed. There is an effect that a large number of units can be placed in a small area with a small occupied space.

In addition, when using an electric wheelchair at home, a trunk of a private car or a rear space of a wagon car may be used.
Because the electric wheelchair can be folded and placed, it is very convenient when the caregiver and the electric wheelchair are going to go far away.

Further, in terms of weight, a structure in which only the rear wheels are independently driven, and the drive motor, the battery, and the control box are fixed to the basic frame of the wheelchair made originally lightweight with minimum necessary fixtures. As a result, the weight of the electric wheelchair can be reduced, and even when going out in a private car, a small number of family members can load it.

[0024]

As described above, according to the present invention, since the electric wheelchair can be folded, the space occupied when the electric wheelchair is not used can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of an electric wheelchair showing one embodiment of the present invention.

FIG. 2 is a plan view of the electric wheelchair of the present invention as viewed from behind.

FIG. 3 is a plan view of the electric wheelchair of the present invention viewed from behind in a folded state.

FIG. 4 is a perspective view showing a state in which a drive motor is attached to a frame.

[Description of Signs] 1 ... frame, 2 ... rear wheel, 5 ... brace, 13 ... drive motor, 14, 15 ... gear, 16 ... battery, 19 ... control box, 21 ... fixture

Claims (4)

[Claims] An electric wheelchair comprising a right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor driving the right rear wheel, and a motor driving the left rear wheel.
An electric wheelchair provided with a mechanism for folding in a direction in which a distance between the right rear wheel and the left rear wheel is reduced. 2. An electric wheelchair comprising a right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor driving the right rear wheel, and a motor driving the left rear wheel.
A mechanism that folds the distance between the right rear wheel and the left rear wheel in a direction to reduce the distance, and the drive motors are shifted from each other when viewed from the rear wheel side so that the drive motors do not collide with each other when the electric wheelchair is folded. Electric wheelchair placed. 3. A right rear wheel and a left rear wheel, a right front wheel and a left front wheel, a motor for driving the right rear wheel, a motor for driving the left rear wheel, and a battery for supplying power to these drive motors. An electric wheelchair including: a drive mechanism for driving one rear wheel in a radial direction of the rear wheel, the drive motor including a mechanism that folds the distance between the right rear wheel and the left rear wheel to decrease, and the battery. An electric wheelchair having the other drive motor mounted so that the other drive motor is housed between the one drive motor and the battery when the electric wheelchair is arranged at an interval. 4. A vehicle according to claim 3, further comprising a control box containing a control device for controlling the rotation of said drive motor, said control box being arranged on a frame supporting an axle of one rear wheel, and folding the wheelchair. An electric wheelchair in which the control box is arranged at a position where the control box does not collide with the drive motor and the battery.