KR20200121448A - Combination structure of electric drive wheel for wheelchair - Google Patents

Abstract

The present invention relates to an electric driving wheel coupling structure for a wheelchair, which allows an electric driving wheel to be simply assembled after removing a non-electric driving wheel from an existing manual wheelchair, thereby having excellent assembling properties and stability. To this end, the electric driving wheel coupling structure for a wheelchair includes a fixing plate, a front rotation preventing part, and a back rotation preventing part.

Description

Combination structure of electric drive wheel for wheelchair

The present invention relates to a coupling structure of an electric drive wheel for a wheelchair, and in particular, to a coupling structure of an electric drive wheel for a wheelchair that can easily assemble the electric drive wheel after separating the non-motorized drive wheel of a conventional manual wheelchair.

A wheelchair is a chair with wheels that allow a person with limited legs or a person with disabilities to move while sitting, and is a medical aid that helps the physically handicapped, patients, and the elderly with disabilities to move easily.

Such wheelchairs are largely divided into manual wheelchairs that drive wheels by manpower and electric wheelchairs that drive wheels using a transmission device.

Manual wheelchairs are collapsible and light, so they have good portability, and are relatively inexpensive, but in order to move, there is a disadvantage of inferior mobility, such as the hassle of the user having to manually push the driving wheel to rotate.

On the other hand, the electric wheelchair has excellent mobility and convenient operation, but it is difficult to carry because it is expensive and heavy.

Meanwhile, the structure of a wheelchair that can be driven electrically like an electric wheelchair by attaching a separate electric module to a conventional manual wheelchair is described in KR 10-1715293 (hereinafter referred to as'patent document 0001') and KR10-2017-0090371A (hereinafter, It has been proposed as'Patent Document 0002').

Patent Literature 0001 is a cylindrical friction rotor that is installed externally to the outside of a wheel of a wheelchair and rotates in contact with one side of the wheel; A driving unit connected to a central axis of the friction rotor to rotate the friction rotor; And a control unit that is electrically connected to the driving unit and controls the driving according to the user's operation, comprising: a driving auxiliary device that is simply mounted on an existing manual wheelchair to power the wheels of the existing wheelchair. It has the driving capability, and in the case of the existing electric wheelchair, it was difficult to load it on a vehicle due to its size and weight, but it has the advantage of making it easy to transport and load by using the folding function of the manual wheelchair.

Patent Document 0002 converts into an electric wheelchair that is formed to be detachable from a manual wheelchair that drives the wheels by hand and automatically drives the wheels by power. In particular, it is possible to attach and detach and change the electric type regardless of the shape or size of the wheelchair. It relates to a detachable electric device that enables the distribution of electric wheelchairs at a low cost, and is mounted on each of the installation frames on both sides that support both wheels in the wheelchair, and a drive that transmits the rotational force of the rollers to the wheels by attaching the rollers to the wheels. module; And a control module for controlling the driving of the driving module.

In the case of patent documents 0001 and 0002, there is an advantage of being able to move electrically like an electric wheelchair by mounting on a manual wheelchair, but there is a risk that the roller and the wheel of the wheelchair may slip, and there is a risk of injury due to pinching of fingers between the roller and the wheelchair. Etc. There is a problem that is vulnerable to safety.

KR 10-1715293 B1 (2017.03.06) KR10-2017-0090371A (2017.08.07)

The present invention for solving such a conventional problem is to provide a coupling structure of an electric drive wheel for a wheelchair having excellent assembly properties and excellent stability, such as being able to easily assemble the electric drive wheel after separating the non-powered drive wheel of the conventional manual wheelchair. There is a purpose.

The present invention for achieving the above object is a coupling structure of the electric drive wheel for a wheelchair for fixing the electric drive wheel on which the hub motor is installed to the frame from which the non-motorized drive wheel of the manual wheelchair is separated, the housing side of the hub motor of the electric drive wheel A plurality of screw holes are formed, a fixing shaft for axial fixing of the hub motor to the shaft hole formed in the frame of the manual wheelchair is provided, a through hole formed in the center through which the fixing shaft passes, and a side surface of the housing of the hub motor A plurality of fastening members respectively screwed to the formed screw holes pass through, a plurality of fastening holes formed around the through hole, and at least an edge when the shaft is fixed to the frame together with the electric drive wheel by the fixing shaft. A fixing plate including a plurality of fixing holes formed at positions corresponding to the periphery of the frame; Of the plurality of fixing holes of the fixing plate, when the fixing plate is axially fixed to the frame together with the electric drive wheel by the fixing shaft, one fixing hole located at the front side of the frame and the other fixing hole located at the rear side of the frame It provides a coupling structure of an electric drive wheel for a wheelchair, characterized in that it comprises a; fixed to the fixing hole, each fixed to the front rotation preventing portion and the rear rotation preventing portion to prevent rotation of the fixed plate.

Here, a first extension plate portion extending to one of the fixed plates, and a second extension plate portion extending at a portion spaced apart from the first extension plate portion by a predetermined distance are provided, and the first extension plate portion and the second extension plate portion are provided. It is preferable that the plurality of fixing holes are formed in the extension plate.

In addition, it is preferable that the front rotation preventing portion and the rear rotation preventing portion each be provided with a fixed body having an inner diameter or a diagonal length gradually smaller toward the outside.

Alternatively, a screw line is formed on the inner circumferential surfaces of the plurality of fixing holes of the fixing plate, and the inner diameter or the diagonal length of the front rotation prevention part and the rear rotation prevention part gradually decreases toward the outside and penetrates from one side to the other. It is preferable that a fastening hole is formed and includes a fixing body made of rubber or synthetic resin, and a fastening member that is screwed into a plurality of fixing holes of the fixing plate through the fastening holes of the fixing body.

Further, an expansion groove communicating with the fastening hole is formed on one side of the fixed body, a sleeve part inserted into the fastening hole of the fixed body in the front rotation preventing part and the rear rotation preventing part, and the sleeve part integrally A reinforcing sleeve including a head portion formed of and having a communication hole communicating with the sleeve portion and received in an expansion groove of the fixed body; A position fixing part which is in close contact with one side of the reinforcing sleeve, has an auxiliary hole formed in communication with the communication hole of the reinforcing sleeve, and includes a protrusion inserted and fixed to one of the plurality of fixing holes of the fixing plate at the lower part; It is preferably included.

In addition, a fixing groove is formed on the inner side of the fixed sleeve shaft of the hub motor, the fixed shaft is shaft fixed to the shaft hole formed in the frame of the manual wheelchair, and a ball inserted into the fixing groove of the fixed sleeve shaft of the hub motor on one side A tubular body having a ball hole for receiving a ball hole and having a stepped jaw formed on the inner surface of the other side; A shaft inserted into the tubular body, a ball groove formed on one side, and a protruding jaw on the other side and a button integrally formed with the protruding jaw; A fixing member having one side coupled to the other side of the tubular body while receiving the protruding jaw therein, and having a through hole formed at the other side through which the button passes; It is preferable that the configuration includes; an elastic member provided between the stepped jaw of the tubular body and the protruding jaw of the shaft while receiving the shaft inside.

The present invention has excellent assembleability, such as being able to easily assemble the electric drive wheel into a manual wheelchair where the non-motorized drive wheel is separated through a fixed plate coupled to the housing side of the hub motor of the electric drive wheel, and the front rotation prevention part and the rear rotation prevention part. In addition, stability is also very good.

1 is a perspective view schematically showing a state in which a fixing plate is fixed to an electric drive wheel of a coupling structure of an electric drive wheel for a wheelchair according to an embodiment of the present invention,
Figure 2 is an exploded perspective view of Figure 1,
3 is a perspective view schematically showing a state in which a front rotation prevention part and a rear rotation prevention part are fixed together with a fixed plate to an electric drive wheel,
Figure 4 is an exploded perspective view of Figure 3,
5 is a partial perspective view schematically showing a state in which the front rotation prevention part is separated from the fixed plate,
6 is a separated cross-sectional view taken along line A-A of FIG. 5,
7 is a combined cross-sectional view of FIG. 6,
8 is an exploded perspective view schematically showing a state in which the electric drive wheel is separated from the frame of the manual wheelchair,
9 is a side view schematically showing a state in which an electric drive wheel is coupled to a frame of a manual wheelchair,
10 and 11 are side views schematically showing a state in which the front and rear distance between the electric rotation prevention unit and the rear rotation prevention unit is adjusted according to the standard of the frame of the manual wheelchair,
12 is a side view schematically showing a state in which the front and rear distance between the electric rotation prevention unit and the rear rotation prevention unit is finely adjusted according to the standard of the frame of the manual wheelchair,
13 is a cross-sectional view schematically showing a state in which a fixing groove is formed on an inner surface of a hollow shaft of a hub motor,
14 is an exploded cross-sectional view schematically showing the fixed shaft,
15 is a cross-sectional view of the combination of FIG. 14,
16 and 17 are separate cross-sectional views schematically showing a coupling process of a hollow shaft and a fixed shaft of a hub motor,
18 and 19 are separate cross-sectional views schematically showing a process of separating a hollow shaft and a fixed shaft of the hub motor.

Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings. Of course, the scope of the present invention is not limited to the following embodiments, and various modifications may be made by those of ordinary skill in the art within the scope not departing from the technical gist of the present invention.

The coupling structure of the electric drive wheel for a wheelchair according to an embodiment of the present invention relates to a coupling structure capable of assembling the electric drive wheel easily after separating the non-motorized drive wheel of an existing manual wheelchair, and largely, an electric drive wheel, a fixed plate, and a front rotation prevention part , Including a rear rotation preventing portion and a fixed shaft.

1 is a perspective view schematically showing a state in which a fixing plate is fixed to an electric drive wheel having a coupling structure of an electric drive wheel for a wheelchair according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG.

First, the electric drive wheel 3 is to be replaced with a non-powered drive wheel of a conventional manual wheelchair, as shown in Figs. 1 and 2, a hub motor (31 in Fig. 13), a hub 32, a plurality of spokes 33, a rim (not shown) and a tire 35, and a hand rim (not shown) may be further provided.

The hub 32 is rotationally coupled while surrounding the hub motor 31, and the hub 32 is rotated by driving the hub motor 31.

The plurality of spokes 33 may be disposed between the hub 32 and a rim (not shown), and the tire 35 may be fixedly installed on the rim (not shown).

A fixed sleeve shaft (312 of FIG. 13) may be provided in the center of the housing (311 of FIG. 13) of the hub motor 31.

In the fixed sleeve shaft 312, a fixed shaft 40 fixed to a shaft hole formed in a frame (2 in FIG. 8) of a conventional manual wheelchair may be inserted and fixed.

In addition, a shaft hole 313 communicating with the fixed sleeve shaft 312 may be formed in the center of the side surface of the housing 311 of the hub motor 31.

A plurality of screw holes 314 may be formed around the shaft hole 313 at regular intervals.

Next, the fixing plate 10 is for fixing the hub motor 31 of the electric drive wheel 3 to the frame 2 of an existing manual wheelchair.

A through hole 101, a plurality of fastening holes 102, and a plurality of fixing holes 103 may be formed in the fixing plate 10.

The through hole 101 is formed in the center of the fixed plate 10 to communicate with the shaft hole 313 of the housing 311 of the hub motor 31.

The fixed shaft 40 may horizontally penetrate the through hole 101.

The plurality of fastening holes 102 are formed in the portion of the fixing plate 10 around the through hole 101 of the fixing plate 10 so as to communicate with the plurality of screw holes 314 of the hub motor 31. .

As the plurality of fastening members 7 which may be formed of fastening bolts, etc. pass through the plurality of fastening holes 102 and are screwed into the plurality of screw holes 314 of the hub motor 31, the fixing plate ( 10) is fixedly installed on the housing 311 of the hub motor 31.

When the fixed plate 10 is axially fixed to the frame 2 together with the electric drive wheel 3 by the fixed shaft 40, at least around the frame 2 among the edges of the fixed plate 10 A plurality of fixing holes 103 may be formed at corresponding positions at regular intervals.

3 is a perspective view schematically showing a state in which a front rotation prevention part and a rear rotation prevention part are fixed together with a fixing plate to an electric drive wheel, and FIG. 4 is an exploded perspective view of FIG. 3.

Next, the front rotation prevention part 20 and the rear rotation prevention part 30 are for preventing rotation of the fixing plate 10.

The front rotation preventing part 20 is as shown in FIGS. 3 and 4 when the fixing plate 10 is shaft-fixed to the frame 2 together with the electric drive wheel 3 by the fixing shaft 40. Likewise, among the plurality of fixing holes 103 of the fixing plate 10, it may be fixedly installed in any one fixing hole 103 of a portion of the fixing plate 10 located on the front side of the frame 2.

In addition, the rear rotation preventing portion 30 when the fixed plate 10 is shaft-fixed to the frame 2 together with the electric drive wheel 3 by the fixed shaft 40 FIGS. 3 and 4 As can be seen from, among the plurality of fixing holes 103 of the fixing plate 10, it may be fixedly installed in the other fixing hole 103 of the part of the fixing plate 10 located at the rear side of the frame 2 have.

5 is a partial perspective view schematically showing a state in which the front rotation preventing portion is separated from the fixed plate, FIG. 6 is a separated cross-sectional view taken along line A-A of FIG. 5, and FIG. 7 is a combined cross-sectional view of FIG.

Next, as shown in FIG. 5, first and second extension plate portions 110 and 120 may be formed on the fixing plate 10.

The first extension plate part 110 may be extended to a predetermined length from one side of the fixing plate 10, for example, from an upper front side of the fixing plate 10 to an upper direction of the fixing plate 10.

The second extension plate part 120 is a portion of the fixing plate 10 spaced apart from the first extension plate part 120 by a predetermined distance, for example, of the fixing plate 10 at the upper and rear sides of the fixing plate 10. It may be formed to extend in a predetermined length in the upper direction.

A plurality of fixing holes 103 may be formed in the first and second extension plates 110 and 120 at regular intervals.

A third extension plate 130 may be further formed on the fixed plate 10.

A plurality of fixing holes 103 may also be formed in the third extension plate part 130 at regular intervals.

8 is an exploded perspective view schematically showing a state in which the electric drive wheel is separated from the frame of the manual wheelchair, and FIG. 9 is a side view schematically showing a state in which the electric drive wheel is coupled to the frame of the manual wheelchair.

Next, as shown in Figs. 8 and 9, so that the frame 2 of the manual wheelchair 1 can be more easily inserted between the front rotation prevention part 20 and the rear rotation prevention part 30. In order to do so, fixed bodies 210 and 310 may be provided on the front rotation preventing part 20 and the rear rotation preventing part 30, respectively, as shown in FIGS. 5 to 7.

The inner diameter (FIG. 5B) or diagonal (FIG. 5D) length of the fixed bodies 210 and 310 may be formed gradually smaller from one side of the fixed bodies 210 and 310 toward the outside of the other side. .

The front rotation prevention part 20 and the rear rotation prevention part 30 are easily fixed in position in a position-adjusted state, and the replacement and maintenance of the front rotation prevention part 20 and the rear rotation prevention part 30 are easy. For improvement, as shown in FIGS. 5 to 7, the front rotation prevention part 20 and the rear rotation prevention part 30 include the fixed bodies 210 and 310 and fastening members 220 and 320. Can be configured.

Fastening holes 211 and 311 which are horizontally horizontally penetrated from one side of the fixed body 210 and 310 to the other side may be formed inside the fixed bodies 210 and 310.

In addition, the fixed bodies 210 and 310 may be made of various types such as rubber or synthetic resin.

A thread may be formed on the inner circumferential surface of the plurality of fixing holes 103 of the fixing plate 10.

The fastening members 220 and 320 horizontally pass through the fastening holes 211 and 311 of the fixing body 210 and 310, and one of the plurality of fixing holes 103 of the fixing plate 10 It may be made of a fastening shaft that is screwed to (103).

One side of the fastening shaft capable of forming the fastening members 220 and 320 may be screwed into any one of the plurality of fastening holes 103.

10 and 11 are side views schematically showing a state in which the front and rear distances between the electric rotation prevention unit and the rear rotation prevention unit are adjusted according to the standard of the frame of the manual wheelchair.

Next, according to the outer diameter (R) size of the frame (2) of the manual wheelchair (1), as shown in Figs. 10 and 11, between the front rotation prevention unit 20 and the rear rotation prevention unit 30 The front and rear spacing can be adjusted.

As the outer diameter size (R) of the frame 10 increases, the front and rear distance between the front rotation preventing portion 20 and the rear rotation preventing portion 30 may be widened, and the outer diameter size (R) of the frame 10 As) is smaller, the front and rear distance between the front rotation prevention part 20 and the rear rotation prevention part 30 may be narrowed.

Next, according to the size of the outer diameter (R) of the frame (2) of the manual wheelchair (1), it is possible to further finely adjust the front and rear distance between the front rotation prevention unit 20 and the rear rotation prevention unit 30 For this purpose, reinforcing sleeves 230 and 330 and position fixing parts 240 and 340 may be further provided in the front rotation prevention part 20 and the rear rotation prevention part 30 as shown in FIGS. 5 to 7. have.

As shown in FIG. 6, expansion grooves 212 and 312 communicating with the fastening holes 211 and 311 may be formed on the inner surfaces of the fixed bodies 210 and 310.

As an example, the fastening holes 211 and 311 may be horizontally formed on the other side of the fixed body 210 and 310, and the expansion grooves 212 and 312 may communicate with the fastening holes 211 and 311. It may be formed to be recessed to a predetermined depth in the direction from one side of the fixed body (210, 310) to the other side.

The expansion grooves 212 and 312 may include upper expansion grooves 212a and 312a and lower expansion grooves 212b and 312b.

The upper expansion grooves 212a and 312a may be formed on one side of the fixed body 210 and 310 in a state in communication with the fastening holes 211 and 311.

The cross-sectional shape of the upper expansion grooves 212a and 312a may be formed in various shapes such as a circular shape.

The lower expansion groove (212, 312b) is located in the lower direction of the upper expansion groove (212a, 312a) in a state in communication with the upper expansion groove (212a, 312a) inside one side of the fixed body (210, 310) It can be formed at the bottom.

The cross-sectional shape of the lower expansion grooves 212 and 312b may be formed in various shapes such as a square.

The reinforcing sleeves 230 and 330 may be largely configured to include sleeve portions 231 and 331 and head portions 232 and 332.

The sleeve portions 231 and 331 may be horizontally inserted into the fastening holes 211 and 311 of the fixed bodies 210 and 310.

The head portions 232 and 332 may be integrally formed on one side of the sleeve portions 231 and 331.

The head portions 232 and 332 may include upper head portions 232a and 332a and lower head portions 232b and 332b.

The upper head portions 232a and 332a may be integrally formed on one side of the sleeve portions 231 and 331.

Communication holes 232c and 332c communicating with the sleeve portions 231 and 331 may be formed inside the upper head portions 232a and 332a.

The upper head portions 232a and 332a have a cross-sectional shape corresponding to the cross-sectional shape of the upper expansion grooves 212a and 312a, and the upper head portions 232a and 332a are provided with the expansion grooves 212 and 312. ) May be accommodated in the upper expansion grooves 212a and 312a.

The lower head portions 232b and 332b are formed in a state in which the cross-sectional shape of the lower head portions 232b and 332b corresponds to the cross-sectional shape of the lower expansion grooves 212 and 312b. ) May be accommodated in the lower expansion grooves 212 and 312b.

The position fixing portions 240 and 340 may include auxiliary head portions 241 and 341 and protrusions 242 and 342.

The auxiliary head portions 241 and 341 may be in close contact with one side of the reinforcing sleeves 230 and 330 while being inserted into the communication holes 232c and 332c of the reinforcing sleeves 230 and 330.

When the fastening members 220 and 320 are rotated in the tightening direction and the reinforcing sleeves 230 and 330 are pressed in the direction of the position fixing portions 240 and 340, the outer surfaces of the auxiliary head parts 241 and 341 are In order to be gradually tightly fixed to the inner surfaces of the communication holes (232c, 332c) of the reinforcing sleeves (230, 330), one outer surface of the auxiliary head (241, 341) An annular inclined surface 241a, 341a may be formed that slopes downward from one side toward the other side toward the inside of the auxiliary head portions 241 and 341.

In addition, annular inclined surfaces 232d and 332d that slope downward along the annular inclined surfaces 241a and 341a may also be formed on the inner surfaces of one side of the communication holes 232c and 332c of the reinforcing sleeves 230 and 330.

Auxiliary holes 241b and 341b communicating with communication holes 232c and 332c of the reinforcing sleeves 230 and 330 may be formed in the auxiliary head portions 241 and 341.

The protrusions 242 and 342 may be formed to protrude from one lower side of the auxiliary head portions 241 and 341 to the fixed plate 10 with a predetermined length.

The protrusions 242 and 342 may be inserted and fixed in any one of the fixing holes 103 of the fixing plate 10, which faces the protrusions 242 and 342.

The fastening members 220 and 320 include the inside of the sleeve parts 231 and 331, communication holes 232c and 332c of the head parts 232 and 332, and auxiliary holes of the auxiliary head parts 241 and 341 ( 241b, 341b) can be sequentially horizontally penetrated.

12 is a side view schematically showing a state in which the front and rear distances between the electric rotation prevention unit and the rear rotation prevention unit are finely adjusted according to the standard of the frame of the manual wheelchair.

The fastening holes 211 and 311 of the fixed bodies 210 and 310 may be eccentric, and as shown in FIG. 12 when the fastening states of the fastening members 220 and 320 are released, the operator The front side according to the outer diameter (R) size of the frame (2) of the manual wheelchair (1) while rotating the reinforcing sleeves (230, 330) together with 210, 310 in the front and rear directions of the fixed body (210, 310) It is possible to further finely adjust the front and rear distance between the rotation preventing part 20 and the rear rotation preventing part 30.

13 is a cross-sectional view schematically showing a state in which a fixing groove is formed on an inner surface of a hollow shaft of a hub motor.

Next, as shown in FIG. 13, an annular fixing groove 315 may be formed on one side of the inner side of the fixed sleeve shaft 312 of the hub motor 31.

FIG. 14 is a schematic cross-sectional view of a fixed shaft, and FIG. 15 is a cross-sectional view of FIG. 14.

As shown in FIGS. 14 and 15, the fixing shaft 40 may be configured to include a tubular body 410, a shaft 420, a fixing member 430, and an elastic member 440.

At one side of the tubular body 410, two or more ball holes 412 for receiving balls 411 inserted into the fixing grooves 315 of the fixed sleeve shaft 312 of the hub motor 31 are at regular intervals. It can be formed in plural.

An annular stepped step 413 may be formed on the inner surface of the other side of the tubular body 410 in various shapes such as a'┏' shape.

The shaft 420 may be inserted into the tubular body 410.

An annular ball groove 421 may be formed on one side of the shaft 420.

On the other side of the shaft 420, an annular protruding protrusion 422 protruding outwardly of the shaft 420 may be formed.

A button 423 may be integrally formed on the other side opposite to one side of the protruding protrusion 422 to a predetermined length outward of the other side of the protruding protrusion 422.

One side of the fixing member 430 may be screwed to the other side of the tubular body 410 in a state in which the protruding protrusion 422 is accommodated inside the fixing member 430.

A through hole 431 through which the button 423 passes may be formed on the other side of the fixing member 430.

In a state in which the shaft 420 is accommodated inside the elastic member 440, the elastic member 440 has a stepped jaw 413 of the tubular body 410 and a protruding jaw 422 of the shaft 420 In a state provided therebetween, it may be formed of various types such as a spring that elastically supports the protruding jaw 422 in the other direction of the fixing member 430 by an expansion force in a normal state.

16 and 17 are separate cross-sectional views schematically showing a coupling process of a hollow shaft and a fixed shaft of a hub motor.

As shown in FIGS. 16 and 17, the tubular body 410 of the fixed shaft 40 is shaft-fixed in a state that horizontally penetrates the shaft hole 21 formed in the frame 2 of the manual wheelchair 1 I can.

In addition, one end of the fixing member 430 of the fixing shaft 40 may be tightly fixed to the portion of the frame 2 around the shaft hole 21 of the frame 2 of the manual wheelchair 1.

As shown in Fig. 17, the ball groove 421 of the shaft 420 and the ball hole 412 are mismatched by the elastic force of the elastic member 440 in the normally expanded state, so that the ball 411 is the tubular body. It may be pushed outwardly of 410 and inserted and fixed in the fixing groove 315 of the fixing sleeve shaft 312 of the hub motor 31.

18 and 19 are separate cross-sectional views schematically illustrating a process of separating a hollow shaft and a fixed shaft of the hub motor.

The operator presses and presses the button 423 of the fixed shaft 40 in one direction of the shaft 420 so that the ball groove 421 of the shaft 420 and the ball hole 412 coincide with each other. As shown in FIGS. 18 and 19, the hub motor 31 may be separated by moving it outwardly to one side of the fixed shaft 40, and at this time, the ball 411 may be moved to the inside of the body 410. There is no fear that the ball 411 acts as an obstruction factor in separating the hub motor 31.

The present invention configured as described above is through the fixed plate 10 coupled to the housing 311 side of the hub motor 5 of the electric drive wheel 3 and the front rotation prevention part 20 and the rear rotation prevention part 30 The electric drive wheel 3 can be easily assembled to the manual wheelchair 1 from which the non-motorized drive wheel is separated, and the assembling property is excellent, and stability is also very excellent.

One; Manual wheelchair, 3; Electric drive wheel,
5; Hub motor, 10; Fixed plate,
20; Front rotation prevention unit, 30; Rear rotation prevention part,
40; Fixed shaft.

Claims (6)

It is a combined structure of electric drive wheels for wheelchairs to fix the electric drive wheels installed with the hub motor to the frame where the non-motorized drive wheels of the manual wheelchair are separated,
A plurality of screw holes are formed on the side of the housing of the hub motor of the electric drive wheel,
A fixed shaft for fixing the hub motor to the shaft hole formed in the frame of the manual wheelchair is provided,
A plurality of fastening holes formed in the center through which the fixing shaft penetrates, and a plurality of fastening members respectively screwed into a plurality of screw holes formed on the side of the housing of the hub motor and formed around the through holes, A fixing plate including a plurality of fixing holes formed at a position corresponding to a periphery of the frame among at least an edge when the shaft is fixed to the frame together with the electric drive wheel by the fixing shaft;
Of the plurality of fixing holes of the fixing plate, when the fixing plate is axially fixed to the frame together with the electric drive wheel by the fixing shaft, one fixing hole located at the front side of the frame and the other fixing hole located at the rear side of the frame A combination structure of an electric drive wheel for a wheelchair, comprising: a front rotation prevention unit and a rear rotation prevention unit respectively fixedly installed in the fixing holes to prevent rotation of the fixing plate.
The method of claim 1,
A first extension plate portion extending to one of the fixed plates and a second extension plate portion extending at a predetermined distance from the first extension plate portion are provided,
A coupling structure of an electric drive wheel for a wheelchair, characterized in that a plurality of fixing holes are formed in the first and second extension plates.
The method of claim 1,
The coupling structure of the electric drive wheel for wheelchairs, characterized in that the front rotation preventing portion and the rear rotation preventing portion, respectively, the inner diameter or the diagonal length is provided with a fixed body formed gradually smaller toward the outside.
The method of claim 1,
A screw line is formed on the inner circumferential surface of the plurality of fixing holes of the fixing plate,
The front anti-rotation part and the rear anti-rotation part are formed with an inner diameter or diagonal length gradually smaller toward the outside, and a fastening hole formed through from one side to the other is formed, and the fixed body made of rubber or synthetic resin, and the fixed body are fastened. A coupling structure of an electric drive wheel for a wheelchair, characterized in that each includes a fastening member that is screwed into a plurality of fixing holes of the fixing plate through a ball.
The method of claim 4,
An expansion groove communicating with the fastening hole is formed on one side of the fixed body,
A sleeve portion inserted into the fastening hole of the fixed body in the front rotation preventing portion and the rear rotation preventing portion, and a communication hole formed integrally with the sleeve portion and communicating with the sleeve portion are formed, and in the expansion groove of the fixed body A reinforcing sleeve including a head portion to be received;
A position fixing part which is in close contact with one side of the reinforcing sleeve, has an auxiliary hole formed in communication with the communication hole of the reinforcing sleeve, and includes a protrusion inserted and fixed to one of the plurality of fixing holes of the fixing plate at the lower part; The coupling structure of the electric drive wheel for a wheelchair, characterized in that included.
The method of claim 5,
A fixing groove is formed on the inner surface of the fixed sleeve shaft of the hub motor,
The fixed shaft is axially fixed to the shaft hole formed in the frame of the manual wheelchair, a ball hole is formed on one side to receive a ball inserted into the fixing groove of the fixed sleeve shaft of the hub motor, and a stepped jaw is formed on the inner surface of the other side. Body;
A shaft inserted into the tubular body, a ball groove formed on one side, and a protruding jaw on the other side and a button integrally formed with the protruding jaw;
A fixing member having one side coupled to the other side of the tubular body while receiving the protruding jaw therein, and having a through hole formed at the other side through which the button passes;
And an elastic member disposed between the stepped jaw of the tubular body and the protruding jaw of the shaft while receiving the shaft inside.

Images