KR101772509B1

KR101772509B1 - electric wheelchair having easy-steering and no-central axis

Info

Publication number: KR101772509B1
Application number: KR1020160012083A
Authority: KR
Inventors: 박성기
Original assignee: 박성기
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2017-09-13
Also published as: KR20170091281A

Abstract

The present invention has a simple structure without a central shaft and reduces the rotational speed of the motor by the gear ratio of the driving gear provided in the driving means and the connecting gear provided inside the wheel, It is possible to carry out more stable running, to simplify the structure of the frame, to reduce the total weight, to make it easy to move and store, to provide separate driving means and power transmission means for each wheel, The present invention relates to an electric wheelchair having a central axis that can be easily changed in direction by controlling the rotational speed of the wheel by each driving means.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wheelchair having an easy-steering and no-

More particularly, the present invention relates to a wheelchair, and more particularly, to a wheelchair which has a simple structure without a central axis, and which has a gear ratio of a driving gear provided in the driving means and a connecting gear provided inside the wheel, The present invention relates to an electric wheelchair having a center shaft that can be more stably driven as the wheel is decelerated and the force is transmitted to the wheel.

Further, it is an object of the present invention to simplify the structure of a frame to simplify the structure of the frame, to facilitate the movement and storage of the frame, to provide separate driving means and power transmission means for each wheel, The present invention relates to an electric wheelchair having a central axis that can be easily changed in direction by allowing control of the rotational speed of the wheel by each driving means.

The wheelchair can be divided into an auxiliary means for moving the patient inside and outside the room, a manual type in which the user directly grasps the wheel by rotating the wheel, and an electric type in which the wheel is rolled by the rotational force of the electric motor .

Various technologies have been developed in connection with such manual or electric wheelchairs, for example, Patent Documents 1 to 4.

Patent Document 1 discloses a vehicle seat comprising a body, a seat portion provided on the upper side of the body so as to allow the user to move in a sitting posture, a drive wheel for moving the body by operation of an operating portion provided on one side of the seat portion, A guard portion provided on one side of a front portion of the main body, the guard portion including a support arm rotatably installed on one side of a main frame front portion of the main body, and a support arm provided on one side of the support arm And an elastic member for elastically supporting the roller member,

Patent Document 2 includes a driving wheel having a rotary knob to be rotatable on both rear sides of a lower frame, auxiliary wheels formed on both front sides of the lower frame, and a handle formed on both sides of a rear end of a chair having an armrest at an upper end of the upper frame A timing pulley connected to the timing pulley by a timing belt; a timing pulley connected to the timing pulley by a timing belt; and a timing pulley connected to the timing pulley by a timing belt, A pair of deceleration motors provided with a timing pulley and coupled to the substrate, a substrate coupled to the lower frame of the wheelchair and having control means, a rechargeable battery for supplying power to the substrate, The present invention relates to a wheelchair driving apparatus,

Patent Document 3 discloses a vehicle seat comprising a metal frame, a seat provided at the center of the frame, the seat having a backrest and an armrest, a large wheel provided on both sides of the frame and integrally formed with a wheel handle on the outside, A passenger wheelchair comprising a rotatable casters to be installed and a footrest to be folded at the forefront of the frame, the passenger wheelchair being formed to be long in the lateral direction and having both ends thereof detachably attached to the frame, And a rotating shaft which rotates together with a wheel gear is provided at a central portion of the rotating body. The rotating body is rotatably provided at one end of the rotating body, A bracket is provided on the upper part of the rotary shaft, and a shaft which is formed on the upper part of the bracket is rotatably coupled to the shaft holding part A control lever provided at the upper end of the shaft end of the driving wheel and rotatably screwing the lower end thereof to the rotating portion thereof and a gear lever for operating the gear motor, A geared motor which is installed outside the bracket of the drive wheel and is driven by the energy of the battery, and a gear motor which drives the drive wheels by contacting the gear of the geared motor with the wheel gear of the drive wheel.

Among the technologies related to the conventional electric wheel chair or the manual wheel chair, in Patent Documents 1 to 3, the entire wheel is driven to rotate around the center of the wheel, and the other components are installed at the center of gravity of the wheel, When moving on the road or struck by something else, there is a problem that can be overturned.

To improve these disadvantages, the technology of Patent Documents 4 and 5 developed by the present applicant is developed.

Patent Document 4 discloses a structure in which a fixing frame provided on both sides of a moving means, a roller frame fastened to the fixing frame and provided with a plurality of rollers on a circumferential surface thereof, a roller frame located on the circumferential surface of the roller frame, And a reverse rotation preventive device for controlling the reverse rotation of the wheel is disposed on the inner surface of the wheel so that the risk of overturning is minimized because the position of the center of gravity is located at the lower portion of the wheel Since the handle is very stable and the handle itself acts as a lever, it has the effect of rolling a heavy drum on the ground, thereby greatly reducing fatigue of the user and preventing the wheel from rotating in a reverse direction on the slope .

However, this Patent Document 4 has a problem in that it is difficult to steer due to the complicated structure and the manual steering by using a plurality of rollers.

In order to overcome such disadvantages, Patent Document 5 discloses a structure in which a frame is fastened to the outside of a guide provided on both sides of a seat of a wheelchair, and an annular bearing groove is vertically installed on the outer peripheral surface of the frame and the inner surface of the wheel An annular bearing portion in which an annular bearing is loaded in the annular bearing groove and a tire mounted on an outer periphery of the wheel, and a wheel and a wheel for a wheelchair without a center shaft constituted by a wheel and a reverse rotation preventing device on the outer peripheral surface of the frame. Patent Document 5 discloses that the annular bearing mounted on the outer circumferential surface of the frame in the structure of the wheel makes the stress distribution of the wheel uniform and increases the rotational force and also uses the locking method of the latch wheel and the stopper Accordingly, it is possible to prevent a safety accident by further increasing the function of preventing slipping even on an inclined surface.

However, in the technique of Patent Document 5, the structure of the frame is too complicated and heavy, and the chain is used, so that it is difficult to reinstall the chain when the chain detaches from the gear.

Further, since the control means for controlling the driving of the wheels is provided, it is difficult to change the direction since the user must change the direction.

1. Korean Utility Model Registration No. 20-0274465 2. Korean Utility Model Registration No. 20-0306252 3. Korean Patent Publication No. 10-2012-0096118 4. Korean Utility Model Registration No. 20-0372830 5. Korean Utility Model No. 20-2008-0003926

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a driving device for a vehicle, And an object of the present invention is to provide an electric wheelchair having no central axis capable of traveling more stably by reducing the rotational speed of the motor by the gear ratio of the connecting gear installed inside and transmitting the force to the wheel.

Further, it is an object of the present invention to simplify the structure of a frame to simplify the structure of the frame, to facilitate the movement and storage of the frame, to provide separate driving means and power transmission means for each wheel, And an object of the present invention is to provide an electric wheel chair having a control means, which can control the rotational speed of the wheel by each driving means separately, and which has no central axis which is easy to change direction.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an electric wheelchair having no central axis and capable of easily turning directions, comprising: a main body having a seat and a back for a user to sit on; And a moving means including a wheel for moving the wheel, wherein the moving means comprises: a ring-shaped wheel having a circular ring on which the wheel is installed; An annular bearing provided on an inner peripheral surface of the wheel; An annular frame provided inside the annular bearing and rotatably supporting the wheel, the annular frame being formed by bending a pipe having a rectangular cross section in a circular shape; An annular gear provided along the inner circumferential surface of the wheel on the inside of the wheel; A connecting gear provided on the inside of the annular frame on which gear teeth meshing with the annular gear are formed; And a driving gear which is rotated by the driving of the driving means, wherein the frame comprises: two columns provided inside the annular frame; A sheet fixing bar horizontally installed between the columns to fix both ends of the sheet; A backrest fixing bar installed at a rear end of the horizontal bar and fixed to the backrest; And a horizontal support bar provided between the annular frames, the horizontal support bar being installed at a lower center of the annular frame.

A ring-shaped reinforcing ring reinforcing the strength of the wheel and having a rectangular cross-section may be further provided between the wheel and the annular bearing.

Preferably, annular bearing covers are further provided on both sides of the annular bearing, and the annular bearing cover is detachably fixed to the annular frame.

A front auxiliary wheel and a rear auxiliary wheel are further provided on the front and rear sides of the horizontal support bar, and the front auxiliary wheel can be folded by being installed on an end of the wheel support which is provided with a turning rod.

The wheel support base includes a handle supported by a handle support, and a control button for controlling the driving of driving means installed on both sides of the handle is installed to control the rotation speed of each wheel separately. The control cable connecting the control button and the driving means is preferably wired to the handle support and the hollow interior of the wheel support.

As described above, according to the present invention, an electric wheel chair having no central axis, which is easy to turn, has an effect of simplifying the structure of the frame and reducing the weight.

In particular, the present invention can prevent frequent failures because there is no chain for power transmission, and a gear ratio of a driving gear provided in the driving means and a connecting gear provided inside the wheel, The rotation speed of the motor is reduced and the force is transmitted to the wheels so that the vehicle can be driven more stably.

Further, according to the present invention, each wheel is provided with a driving means and a power transmission means separately for driving the wheels, and a control means in the form of a steering wheel is provided at the front to separately control the rotational speed of the wheels by the respective driving means So that it is possible to facilitate the direction change.

1 is a perspective view of an example of an electric wheelchair having no central axis,
Fig. 2 is a side view of a state in which a part of an example of an electric wheel chair without a central shaft,
3 is a cross-sectional view of a wheel and driving means of an electric wheelchair having no central axis,
Fig. 4 is an enlarged view of a portion of Fig. 3A
Fig. 5 is a side view of the front and rear wheels constituting the electric wheel chair with no central axis,
FIG. 6 is a side view of a front auxiliary wheel in a folded state, which constitutes an electric wheel chair having no central axis,
FIG. 7 is an exploded perspective view of a wheel constituting an electric wheel chair having no central axis,

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention simplifies the structure of the frame by eliminating the center axis of the wheel on the frame, simplifying the overall structure, reducing the weight, and turning the wheels independently to enable easy turning.

As shown in Figs. 1 to 4, the electric wheelchair having no central axis facilitates turning of the wheelchair according to the present invention includes a main body 30 having a seat and a backrest on which the user is seated, A wheelchair comprising a moving means (10) provided on both sides of a frame (20) and including a wheel (W) for moving the main body by rotating the moving means (10) A ring 11 of a circular ring shape in which a wheel W is installed; An annular bearing (12) provided on an inner peripheral surface of the wheel; An annular frame (13) installed inside the annular bearing and rotatably supporting the wheel, the annular frame (13) being formed by bending a pipe having a rectangular cross section in a circular shape; An annular gear (14) provided along the inner circumferential surface of the wheel on the inside of the wheel; A coupling gear (15) formed inside the annular frame, with gear teeth meshing with the annular gear; And a drive gear (16) formed with gear teeth meshed with the connection gear and rotated by driving of the drive means (16m).

As the driving means 16m is installed on each wheel, both wheels can be separately controlled to be driven, and the direction can be easily changed as the driving of the wheels is separately controlled.

That is, when changing the direction of movement of the wheelchair, the wheelchair can move in a desired direction by reducing the rotation speed of the wheel in the direction to change the direction.

The wheel 11 has a circular ring shape as shown in FIGS. 1 to 4 and 7, and a wheel guide groove 11w in which a wheel W is inserted is formed on the outer circumferential surface. 7, the reinforcing portion may be further formed on the inner peripheral surface of the wheel 11, but it is difficult to bend the reinforcing portion in a circular shape. Therefore,

It is preferable to further provide a reinforcing ring 17 which is formed by bending a bar having a shape of a circle to form a wheel and bending a bar of a rectangular cross section to a circle inside the wheel. (See Figs. 3 and 4)

The reinforcing ring 17 can be manufactured by bending a pipe having a rectangular cross section in a circular shape, and reinforces the strength of the wheel so that the wheel is not deformed.

The wheel 11 is a means for fixing the wheel as described above, so that the wheel W is rotated as the wheel rotates.

The annular bearing 12 is provided as a means for coupling the wheel 11 to the annular frame 13 in a rotatable manner. The annular bearing 12 may be a large-diameter large-diameter bearing used in a large-sized mechanical apparatus, and the annular bearing can be selected from any of commonly used ones, and a detailed description thereof will be omitted.

As described above, the means for rotatably supporting the wheel 11 is an annular frame 13. The annular frame 13 is formed by winding a bar having a rectangular cross-section, as shown in Figs. 1 to 4 and 7, And a frame 20, which will be described later, is installed inside. Of course, the annular frame 13 is also a part of the frame.

A motor fixing plate 13f for fixing the driving means 16m and the coupling gear 15 is provided on the inner circumferential surface of the annular frame 13 and a horizontal support bar 24 constituting the frame 20 is formed below the motor fixing plate 13f. And a bar fixing plate 13p to which both ends of the bar fixing plate 13p are fixed.

The annular gear 14 is a means for transmitting the rotational force of the drive means 16m to the wheel 11 and is provided so as not to deviate from the inner circumferential surface of the wheel 11 as shown in Figures 3 and 4 .

The annular gear 14 can be variously modified according to the gear tooth shape of the coupling gear 15. Preferably a chain of bicycles.

And the connecting gear 15 and the driving gear 16 for transmitting the driving force of the driving means 16m to the annular gear 14.

The connecting gear 15 is a means for transmitting the rotational force of the driving gear 16 to the annular gear 14 and preferably has a gear value larger than that of the driving gear 16.

That is, it is preferable that the gear ratio of the connecting gear 15 and the driving gear 16 is relatively large because the connecting wheel 15 is able to exert a large force, The outgoing user must also be able to board and should be able to easily mount on slopes.

The driving means 16m for rotating the driving gear 16 may be a variety of devices capable of providing a rotational output, but it is a motor that is powered by a power source in order to simplify the structure and to facilitate control .

When the annular bearing 12 is exposed to the outside, the driving means 10 constructed as described above is provided with the annular bearing 12. As a result, In addition, since the user's collar or object may be caught in the bearing, it is preferable to further provide the bearing cover 18 on the outside.

As shown in Fig. 7, the bearing cover 18 is formed of a circular ring-shaped plate and can be fixed to the annular frame 13 with a fixing screw or the like.

The moving means 10 constituted as described above is installed in each wheel as described above and a body 30 composed of a seat S and a backrest B to which the user can sit between the moving means Respectively.

The frame 20 is provided as a means for supporting the main body 30 installed as described above and for supporting between the two moving means.

As shown in FIGS. 1 and 2, the frame 20 includes two pillars 21 installed inside the annular frame 13, respectively. A sheet fixing bar 22 horizontally installed between the columns to fix both ends of the sheet; A backrest fixing bar 23 provided at a rear end of the horizontal bar and to which a backrest is fixed; And a horizontal support bar (24) provided between the annular frames, the horizontal support bar being installed at the lower center of the annular frame.

1, 2 and 7, the column 21 is provided inside the annular frame 13 having a circular ring shape. In the middle between the two pillars 21, (22) are connected horizontally.

Of course, the horizontal support bar 24 is provided at the lower end of the annular frame 13 so as to maintain the distance between the two annular frames 13, Both ends of which are fixed to the bar fixing plate 13p.

Of course, a support bar may be provided between the backrest fixing bars to maintain the gap between the backrest support bars.

Since the center wheel can not be centered only by the wheel W, the electric wheel chair having no central axis, which is easy to turn according to the present invention having the above-described structure, can be provided with at least one auxiliary wheel for maintaining the front- .

2, a front wheel 31 and a rear wheel 32 are provided at front and rear sides of the horizontal support bar 24, respectively, as shown in FIG. 2, It is installed more.

When the auxiliary wheels are installed, the entire length of the wheelchair may become long and difficult to store and transport. Therefore, the front auxiliary wheels 31 extended forwardly are provided on the wheel support 31s with the turning rods 31r, hinge pins 31h To be folded so as to be folded.

That is, when carrying the wheelchair, it is preferable to fold the auxiliary wheel to the wheelchair body side as shown in FIG. 6 to reduce the entire length.

As described above, the wheelchair of the present invention is provided with moving means and driving means on both wheels, and it is preferable to provide the operating means (40) for controlling the driving of the driving means.

The operating means 40 can be installed at various positions, but it is provided on the wheel support 31s. That is, the wheel support 31s is installed at the center of the horizontal support 24 as shown in the drawing, and is positioned in the center of the user. The handle support 41s is vertically disposed on the wheel support 31s at the center of the user and the handle 41 is provided at the upper end of the handle support 41s. And a control button 41b for controlling the driving of the motor 16m.

Of course, the control button 41b controls the speed of the wheel by controlling the driving speed of each driving means 16m for rotating both wheels. The control button 41b controls the speed of the wheel by controlling the control button 41b The cable 41c is wired to the hollow support of the handle support 41s and the wheel support 31s to prevent the wiring from being damaged by an external impact and to prevent the cable from being damaged due to exposure to the outside .

It is obvious that the wheelchair according to the present invention constructed as described above further includes a power supply means for supplying power necessary for driving the driving means. The power supply means can be a charger capable of charging, May be the back of the backrest or the bottom of the seat.

10: Moving means
11: Wheels 11w: Wheels Anchoring grooves
12: Annular bearing
13: annular frame 13p: bar fixing plate 13f: motor fixing plate
14: Annular gear
15: Connecting gear
16: drive gear 16m: drive means
17: reinforcing ring
18: Annular bearing cover
20: frame
21: column 22: seat fixing bar 23: backrest fixing bar
24: horizontal support bar
30: Body
31: front auxiliary wheel 31s: wheel support 31r: pivot bar
31h: Hinge pin
32: rear auxiliary wheels
40: Operation means
41: handle 41s: handle support
41b: Control button 41c: Control cable
50: Foot support plate

Claims

(10) including a main body (30) having a seat and a backrest on which a user is seated, and a wheel (W) installed on both sides of a frame (20) Wherein:
The moving means (10) are respectively installed on the wheels,
A ring (11) having a circular ring shape on which the wheel (W) is installed;
An annular bearing (12) provided on an inner peripheral surface of the wheel;
An annular frame (13) installed inside the annular bearing and rotatably supporting the wheel, the annular frame (13) being formed by bending a pipe having a rectangular cross section in a circular shape;
An annular gear (14) provided along the inner circumferential surface of the wheel on the inside of the wheel;
A connecting gear (15) formed with gear teeth meshing with the annular gear and fixed to the inside of the annular frame;
And a driving gear (16) that is rotated by driving of a driving means (16m) fixed to the inside of the annular frame, wherein a gear tooth meshed with the connecting gear is formed,
The frame (20) comprises two pillars (21) respectively installed inside the annular frame (13);
A sheet fixing bar 22 horizontally installed between the columns to fix both ends of the sheet;
A backrest fixing bar 23 provided at a rear end of the horizontal bar constituting the frame and to which the backrest is fixed; And
And a horizontal support bar (24) installed between the annular frames and installed in the lower center of the annular frame,
A front auxiliary wheel 31 and a rear auxiliary wheel 32 are further provided on the front and rear sides of the horizontal support bar 24 and the front auxiliary wheel 31 is mounted on the wheel support base 31s in such a manner that the turning rod 31r is rotated And an electric motor which is provided at one end and is folded.

The method according to claim 1,
Characterized in that a ring-shaped reinforcing ring (17) reinforcing the strength of the wheel and having a rectangular cross section is further provided between the wheel (11) and the annular bearing (12) bathchair.

The method according to claim 1,
Wherein an annular bearing cover (18) is further provided on both sides of the annular bearing, and an annular bearing cover is detachably fixed to the annular frame (13).

delete

The method according to claim 1,
The wheel support 31s is further provided with an operation means 40,
The operating means 40 includes a handle 41 supported by a handle support 41s fixed to the wheel support 31s,
The handle 41 is provided with control buttons 41b for controlling the driving of the driving means 16m provided on both sides thereof so that the rotational speed of each wheel can be separately controlled,
A control cable (41c) for connecting a control button and a driving means provided on the handle is wired to the hollow support of the handle support stand (41s) and the wheel support stand (31s). bathchair.