KR102046151B1 - Electric drivr type wheelchair with stairs going up and down function - Google Patents

Abstract

The present disclosure reduces noise due to wheel driving when driving on a flat surface, and an electric wheelchair configured to enable a safer stepping of the stairs as the auxiliary propulsion is provided by an endless track based on the wheel driving when the stairs are descending. It is about.
According to the present disclosure, an electric wheelchair capable of moving up and down stairs includes a lower support on which a battery is mounted, a chair installed on an upper portion of the lower support, and a lower driving portion installed on a lower portion of the lower support to enable driving and moving up and down stairs. Including, but the lower running portion driving motors are respectively installed on both sides of the lower surface rear of the lower support, the rear wheels rotatably installed on both rear sides of the lower support and driven by the drive motor, and the lower A front wheel rotatably installed at both front sides of the support and electrically connected to the rear wheel, and installed between the rear wheel and the shaft of the front wheel, electrically connects the rear wheel and the front wheel, and assists in climbing the stairs. An endless track that provides propulsion and is connected by a first link to the front of the front wheel and electrically connected to the front wheel. A front driven wheel, a rear driven wheel connected to the rear of the front wheel by a second link and electrically connected to the front wheel, and elastic deflection means for elastically deflecting the first link and the second link in a downward direction. It includes.

Description

ELECTRIC DRIVR TYPE WHEELCHAIR WITH STAIRS GOING UP AND DOWN FUNCTION}

The present disclosure relates to a wheelchair for allowing a person who is not free of a leg or a person who is uncomfortable to move in a sitting state, and more particularly, to an electric wheelchair configured to be able to travel using an electric motor.

Unless otherwise indicated herein, the contents described in this identification are not prior art to the claims of this application and the description in this identification is not admitted to be prior art.

In general, a wheelchair has a structure in which a wheel is provided on a chair so that a person who is not free of a leg or a person who is uncomfortable can move while sitting.

In general, a wheelchair is a structure in which a passenger directly pushes a wheel to move the wheel, so it can be used as a means of transportation without any inconvenience in a section where there is no problem with a manual wheel cloud, such as a flat surface, but a section where an obstacle such as a slope or a long distance is moved or Electric wheelchairs that are configured to be able to travel by using an electric motor are frequently used in cases where the occupant has a severe disability in which the use of an arm is limited. However, even in the case of the above-described electric wheelchair there is a limit to climbing the stairs.

For wheelchair users who are unable to climb stairs freely, public facilities are required to construct separate slopes that allow wheelchairs to move on stairs, but general buildings other than public facilities should be installed without stairs as described above to reduce construction costs. I'm doing it.

In addition, a wheelchair lift is installed in the subway for wheelchair users to move up and down the stairs, but it takes considerable time to use it, and the convenience of using it is reduced due to problems such as calling a station attendant before use. There is a problem that the safety is low because there is no separate fixing device.

Therefore, the wheelchair users are still being severely restricted by the right to move due to the big barrier of stairs.

As an example of a solution to this problem, Korean Patent Publication No. 10-2009-0036063 (published on Apr. 13, 2009) discloses an electric wheelchair in which a wheel part is caterpillar type and a semicircle at the center of the surface touching the ground. A tracked powered wheelchair has been disclosed.

In addition, the Republic of Korea Patent Publication No. 10-2012-0013035 (published on February 14, 2012) has a frame consisting of an upper frame and a lower frame rotatably installed up and down, the pedestal is installed on the upper frame, both sides of the lower frame lower Caterpillar means to be mounted respectively, and first support means mounted to the rear of each of the caterpillar means to maintain the horizontal of the seat when climbing stairs; And a second angle adjusting means installed between the upper frame and the lower frame to adjust a rotation angle of the seat.

In addition, Korean Patent Publication No. 10-2001-0027642 (published on April 6, 2001) discloses a main body, an endless track mounted on both sides of the lower part of the main body and driven by a driving device, a seat provided on the main body, and Disclosed is an electric wheelchair comprising a steering wheel provided at a front, a steering wheel connected to the steering wheel, and an auxiliary wheel provided at a front upper side of the steering wheel so as to form a predetermined distance from the ground.

However, in the case of the conventional electric wheelchair capable of elevating the stairs as described above, although the wheel is mainly transformed into a caterpillar, there is an advantage that the stairs can be elevated, but there is a risk of slipping when the stairs are raised and lowered, and a considerable noise is generated when driving on flat ground. There was a problem.

Patent Document 1: Republic of Korea Patent Publication No. 10-2009-0036063 (published April 13, 2009) Patent Document 2: Republic of Korea Patent Publication No. 10-2012-0013035 (2012.02.14.published) Patent Document 3: Republic of Korea Patent Publication No. 10-2001-0027642 (Published on April 6, 2001)

The noise level is reduced when driving on a flat surface, and when the stairs are raised and lowered, the assistive driving force is provided by the endless track mainly for the wheel driving, and thus, the electric wheelchair capable of moving up and down the stairs is provided. .

In addition, it is not limited to the technical problems as described above, it is obvious that another technical problem may be derived from the following description.

According to an embodiment of the present disclosure, the electric wheelchair capable of lifting up and down includes a lower support on which a battery is mounted, a chair installed on an upper portion of the lower support, and a lower support of the lower support, which is capable of traveling and climbing up and down. It includes a lower running portion, wherein the lower running portion is a driving motor which is respectively installed on both sides of the lower surface rear of the lower support, and the rear side is rotatably installed on both sides of the rear support of the lower support and rotated by the drive motor A wheel, a front wheel rotatably installed at both front sides of the lower support, and electrically connected to the rear wheel, and installed between the rear wheel and the shaft of the front wheel to electrically connect the rear wheel and the front wheel. And an endless track providing auxiliary propulsion force when moving up and down the stairs, and connected by a first link to the front of the front wheel, and the front wheel A front driven wheel electrically connected to the rear wheel, a rear driven wheel connected to the rear of the front wheel by a second link and electrically connected to the front wheel, and elastically deflecting the first link and the second link in a downward direction. It includes an elastic deflection means.

According to a preferred feature of the present disclosure, the chair portion is installed on the upper portion of the lower support to enable attitude control.

According to a preferred feature of the present disclosure, the chair portion is hinged to the center of the lower support to be rotated back and forth, and between the lower support and the chair portion wins the front or rear of the chair portion in accordance with the inclination of the lower support. An attitude control cylinder for lowering and controlling the attitude of the chair is provided.

According to a preferred feature of the present disclosure, the lower end of the caterpillar is located above the lower end of the rear wheel and the front wheel in contact with the ground.

According to an embodiment of the present disclosure, the noise is reduced due to the wheel driving when driving on a flat surface, and when the stairs are descending, as the auxiliary thrust is provided by the caterpillar mainly around the wheel driving, the advantage of being able to climb up and down the stairs more safely. There is this.

In addition, according to an embodiment of the present disclosure, as the front wheel and the rear follower wheel as well as the rear wheel, the front wheel and the rear follower wheel in contact with the ground evenly distributed load of the occupant provides a comfortable ride and at the same time wear of the wheel There is an advantage to be minimized.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic structural diagram of a powered wheelchair capable of moving up and down according to an embodiment of the present disclosure.
Figure 2 is a detailed structural diagram of the lower running portion in the electric wheelchair capable of lifting up and down according to an embodiment of the present disclosure.
3 is a power transmission structure of the lower running portion in the electric wheelchair capable of lifting the stairs according to an embodiment of the present disclosure.
Figure 4 is a step lift operation of the electric wheelchair capable of lifting the stairs in accordance with an embodiment of the present disclosure.

Hereinafter, with reference to the accompanying drawings looks at the configuration, operation and effect of the electric wheelchair capable of lifting the stairs according to the preferred embodiment. For reference, in the drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals throughout the specification refer to the same components and reference numerals for the same components in the individual drawings will be omitted.

1 is a schematic structural diagram of an electric wheelchair capable of moving up and down stairs according to an embodiment of the present disclosure, and FIG. 2 is a detailed structural diagram of a lower running portion of the electric wheelchair capable of moving up and down stairs according to an embodiment of the present disclosure. 3 is a power transmission structure diagram of the lower running portion in the electric wheelchair capable of lifting the stairs according to an embodiment of the present disclosure.

As shown in FIGS. 1 to 3, the electric wheelchair 1 capable of moving up and down stairs according to an embodiment of the present disclosure includes a lower support 100 and a lower support 100 on which a battery (not shown) is mounted. The chair 200 is installed on the upper portion of the lower support 100 is installed on the lower portion of the lower running portion 300 to enable the running and climbing stairs.

Here, the lower support 100 is to form a base plate of the electric wheelchair (1) capable of stepping up and down according to an embodiment of the present disclosure, the upper part is installed in the chair 200 to enable the user's boarding In the lower part, a lower running part 300 is installed to enable driving and moving up and down of the electric wheelchair 1 capable of moving up and down the stairs according to an embodiment of the present disclosure.

The chair part 200 is installed above the lower supporter 100 described above. The chair 200 forms a seat in which the user can sit, and the backrest 210 is provided at the rear to support the user more safely in a sitting state, and armrests 220 are provided at both sides. In addition, the front of one side of the armrest 220 is provided with a travel control controller 230 for driving control, such as forward, backward and steering. In addition, the front lower portion of the chair portion 200 is provided with a footrest 240 for supporting the foot of the occupant.

In addition, it is preferable that the chair part 200 is installed on the upper portion of the lower support 100 so as to be able to control the attitude of the occupant so that the posture of the occupant can be comfortably maintained without being tilted forward and backward when the ramp is run or the descending of the stairs.

In order to control the posture of the chair part 200, the chair part 200 is hinged to the center of the lower support part 100 so as to be rotatable back and forth, and at the same time, the ramp 200 is driven between the lower support part 100 and the chair part 200. In accordance with the inclination of the lower support 100 during the ascending and descending of the stairs, the front or rear of the chair part is raised and lowered about the hinge coupling part of the chair part 200 so that the chair part 200 is kept as horizontal as possible. A control cylinder 250 for attitude control may be installed. In this case, an inclination detection sensor (not shown) may be installed in the lower support 100 in order to detect the inclination of the lower support 100 at the time of driving up or down the slope.

The configuration of controlling the posture of the chair part 200 through the posture control cylinders 250 respectively installed in the front and rear centering on the hinge coupling part of the chair part 200 is already known in the art. Further details will be omitted for the sake of brevity.

The lower running part 300 is installed below the lower support part 100. The lower running part 300 is a key component of the present disclosure that enables the driving and the stepping up and down of the electric wheelchair 1 capable of stepping up and down according to an embodiment of the present disclosure.

As shown in detail in FIG. 2, the lower running part 300 is rotatably driven at both sides of the rear side of the lower support part 100 and the driving motor 310 respectively installed at the rear side of the lower part of the lower support part 100. A rear wheel 320 installed and rotatably driven by the drive motor 310, a front wheel 330 rotatably installed at both front sides of the lower support 100, and electrically connected to the rear wheel 320; Infinite orbit installed between the shaft 321 of the rear wheel 320 and the shaft 331 of the front wheel 330 to electrically connect the rear wheel 320 and the front wheel 330 and to provide auxiliary propulsion force when the stairs are elevated 340, a front driven wheel 350 connected to the front of the front wheel 330 by a first link 351 and electrically connected to the front wheel 330, and a second behind the front wheel 330. The rear driven wheels 360 connected by the links 361 and electrically connected to the front wheels 330, and the ball for elastically deflecting the first link 351 and the second link 361 in the downward direction And a biasing means 370.

The driving motor 310 generates a rotational driving force by receiving power from a battery (not shown) installed in the lower support 100 according to the operation control of the travel control controller 230. The electric motor, in particular, the rotation angle control is possible. It can be formed with a stepping motor.

The rear wheel 320 rotated by the above-described driving motor 310 corresponds to a driving wheel. For compact placement, the shaft 311 of the drive motor 310 extends rearward and the shaft 321 of the rear wheel 320 extends vertically from the side to the inner side, the shaft 311 of the drive motor 310. Bevel gears 313 and 323 are installed at the ends of the shaft 311 of the drive motor 310 and the shaft 321 of the rear wheel 320 for the electric connection between the shaft 321 of the rear wheel 320 and the rear wheel 320. do.

The front wheel 330 is electrically connected to the rear wheel 320 described above. The shaft 331 of the front wheel 330 extends in parallel with the shaft 321 of the rear wheel 320 and is transmitted between the shaft 321 of the rear wheel 320 and the shaft 331 of the front wheel 330. The caterpillar 340 for the connection is connected.

Infinite track 340 for electrically connecting the rear wheel 320 and the front wheel 330 described above does not contact the ground during normal driving, but provides auxiliary propulsion power to climb up and down the stairs only when the stairs are raised and lowered. It is absent. To this end, the lower end of the caterpillar 340 is located above the lower end of the rear wheel 320 and the front wheel 330 in contact with the ground.

In addition, the front wheel 330 is connected to the front wheel 330 by the first link 351. The shaft 353 of the front driven wheel 350 and the shaft 331 of the front wheel 330 are driven by the first transmission chain 355 for the electric connection between the front wheel 330 and the front driven wheel 350. Connected.

In addition, the outer circumferential surface of the front driven wheel 350, the step engaging jaw 357 that is caught on the stepped step is recessed.

In addition, the rear driven wheel 360 is connected to the front wheel 330 by the second link 361. The shaft 363 of the rear driven wheel 360 and the shaft 331 of the front wheel 330 are driven by the second transmission chain 365 for the electric connection between the front wheel 330 and the rear driven wheel 360. Connected.

In addition, the elastic deflection means 370 elastically deflects the first link 351 and the second link 361 in the downward direction so that the front driven wheel 350 and the rear driven wheel 360 do not lift from the ground. The lower supporter 100 and the first and second links 351 and 361 may be formed of an elastic shock absorber installed between them.

Therefore, as shown in FIG. 3, when the driving motor 310 is driven according to the operation control of the driving control controller 230, the rear wheel 320 electrically connected to the driving motor 310 by the bevel gears 313 and 323. ) Is rotated and the front wheel 330 is also rotated by the electric connection of the caterpillar 340.

When the front wheel 330 is also rotated, the front driven wheel 350, which is electrically connected to the front wheel 330 by the first transmission chain 355, is also rotated and the front wheel 330 by the second transmission chain 365. The rear driven wheel 360, which is electrically connected, is also driven to rotate, and thus the driving of the electric wheelchair 1 capable of lifting and lowering the stairs according to the exemplary embodiment of the present disclosure is possible.

In addition, the driving motor 310 of both sides is rotated at each rotational speed, the steering of the electric wheelchair (1) capable of lifting the stairs according to an embodiment of the present disclosure is also made.

4 is a step-up operation of the electric wheelchair capable of moving up and down the stairs according to an embodiment of the present disclosure. Hereinafter, referring to FIGS. 1 to 4, the step-up operation of the step-up capable electric wheelchair 1 according to an embodiment of the present disclosure will be described as follows:

In the case of controlling the operation of the driving control controller 230 in the state of riding on the electric wheelchair (1) capable of lifting the stairs according to an embodiment of the present disclosure, as well as the front wheel 320 and the front wheel 330 As the wheel 350 and the rear driven wheel 360 are brought into contact with the ground, the load of the occupant is evenly distributed, thereby providing a comfortable ride and minimizing wear of the wheels.

In addition, in the case of the electric wheelchair capable of lifting the stairs according to an embodiment of the present disclosure, the frictional force is increased due to the rolling contact of the front follower wheel 350 and the rear follower wheel 360, the running of the slope more easily without slipping Can be done.

In addition, the electric wheelchair (1) capable of elevating the stairs in accordance with one embodiment of the present disclosure, when ascending and descending the stairs, as shown in Figure 4, the front driven wheels 350 linked to the front wheels (330) The endless track 340 for electrically connecting the rear wheel 320 and the front wheel 330 at the same time through the stairs through the stepping jaw 357 is the rear wheel 320 according to the driving of the driving motor 310. In addition to the rotational driving force of the front wheel 330, the front follower wheel 350 and the rear follower wheel 360, in addition to only contacting the stair step jaw additionally provide an auxiliary propulsion to push up or down, while making the stairs easier to move up and down Let's do it.

In addition, as the front follower wheel 350, the front wheel 330, the rear follower wheel 360 and the rear wheel 320 are positioned at each end of the stairs, the stairs run up or down sequentially. It can be made stable.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention and represent all of the technical idea of the present invention. It is to be understood that there may be various equivalents and variations in place of them at the time of the present application. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

1: electric wheelchair that can move up and down stairs
100: lower support
200: chair
210: backrest
220: armrest
230: driving control controller
240: scaffold
250: posture control cylinder
300: lower running part
310: drive motor
320: rear wheel
330: front wheel
340: caterpillar
350: forward driven shaft
360: rear driven shaft
370: elastic deflection means

Claims (8)

A lower support on which the battery is mounted;
A chair unit installed on an upper portion of the lower supporter;
Is installed in the lower portion of the lower support including a lower running portion to enable the running and climbing stairs,
The lower running portion is a drive motor respectively installed on both rear sides of the lower surface of the lower support, a rear wheel rotatably installed on both rear sides of the lower support and driven by the driving motor, and the front of the lower support. It is rotatably installed at both sides and electrically connected to the rear wheels, and is installed between the rear wheels and the shafts of the front wheels to electrically connect the rear wheels and the front wheels and provide auxiliary propulsion force when moving up and down stairs. And a front driven wheel connected by a first link to the front of the front wheel and electrically connected to the front wheel, and connected by a second link to the rear of the front wheel and electrically connected to the front wheel. A step-up-elevable electric wheel body including a rear driven wheel and elastic deflection means for elastically deflecting the first link and the second link in a downward direction. . The method according to claim 1,
Wherein the chair is electric wheelchair capable of moving up and down, characterized in that the posture control is installed on the lower support. The method according to claim 2,
The chair part is hinged to the center of the lower support in a forward and backward rotation, and between the lower support and the chair portion to raise and lower the front or rear of the chair portion in accordance with the inclination of the lower support to control the posture of the chair portion An electric wheelchair capable of stepping up and down, characterized in that the posture control cylinder is installed. The method according to any one of claims 1 to 3,
And a shaft of the drive motor and the shaft of the rear wheel are stepped up and down. The method according to any one of claims 1 to 3,
The lower end of the caterpillar is a powered wheelchair, characterized in that located on the upper side than the lower end of the rear wheel and the front wheel in contact with the ground. The method according to any one of claims 1 to 3,
The shaft of the front driven wheel and the shaft of the front wheel are electrically connected by a first transmission chain, the shaft of the rear driven wheel and the shaft of the front wheel is electrically connected by a second transmission chain is possible Electric wheelchair. The method according to any one of claims 1 to 3,
An electric wheelchair capable of moving up and down stairs, characterized in that the step engaging jaw that is caught on the stepped step is formed in the outer peripheral surface of the front driven wheel. The method according to any one of claims 1 to 3,
The elastic deflecting means is a step-up-elevable electric wheelchair, characterized in that formed by an elastic shock absorber installed between the lower support and the first and second links.

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