WO2014133223A1

WO2014133223A1 - Dynamometer for wheelchair

Info

Publication number: WO2014133223A1
Application number: PCT/KR2013/003707
Authority: WO
Inventors: 손종상; 유제성; 김승현; 김영호
Original assignee: 연세대학교 원주산학협력단
Priority date: 2013-02-27
Filing date: 2013-04-30
Publication date: 2014-09-04
Also published as: KR101336806B1

Abstract

A dynamometer for a wheelchair comprises front wheel holding parts, left and right holding parts, and left and right measurement parts. Front wheels of the wheelchair are stably placed on and fixed to the front wheel holding parts. A pair of rear wheels of the wheelchair is placed on the left and right holding parts and has left and right spaces formed therein, respectively. The left and right measurement parts are received in the left and right spaces and measure outputs of the pair of rear wheels, respectively.

Description

Wheelchair Dynamometer

The present invention relates to a wheelchair dynamometer, and more particularly to a wheelchair dynamometer for measuring the rotational force and the rotational speed of the wheelchair rear wheel.

Generally, a dynamometer is a test facility that performs dynamic measurement and test of rotational force, and is mainly used to obtain data such as torque or rotational speed of a moving object that performs dynamic movement, such as an automobile. Therefore, in the case of a wheelchair dynamometer, it can be used to measure the power when the wheel of the wheelchair rotates.

Recently, various types of wheelchairs have been developed due to the increase of the elderly population and the increase of the activity of the disabled, and a number of electric wheelchairs that can improve the user's convenience are also widely distributed. In this situation, the need for the development of a wheelchair dynamometer for measuring the power of the wheelchair is also increasing, and a number of applications regarding wheelchair dynamometers, such as Patent Application No. 10-2011-0123616, are also in progress.

However, in the case of the above application, it relates to a rudimentary wheelchair dynamometer that includes only the configuration for measuring the power in accordance with the rotation of the wheelchair rear wheel, it does not include a configuration for fixing the wheelchair is a problem that is difficult to secure the wheelchair stable In addition, there is a problem that can not measure the power in consideration of the situation of various ground, such as the slope or friction surface.

Accordingly, the technical problem of the present invention has been conceived in this regard, the object of the present invention relates to a wheelchair dynamometer capable of stably fixing the wheelchair and variously adjust the load.

A wheelchair dynamometer according to an embodiment for realizing the object of the present invention includes a front wheel fixing portion, left and right fixing portions, and left and right measuring portions. The front wheel fixing portion is fixed to the front wheel of the wheelchair seated. The left and right fixing parts are located in each of a pair of rear wheels of the wheelchair, and form left and right spaces therein, respectively. The left and right measurement units are received in each of the left and right spaces, and measure the output of each of the pair of rear wheels.

In one embodiment, it may further include left and right inclined portions disposed at the rear of each of the left and right fixing portions to form an inclined surface on which the wheelchair is moved.

In one embodiment, the front wheel fixing portion may include an upper surface portion, and the front wheel support. The upper surface portion may be seated on the front wheel of the wheelchair. The front wheel support portion may protrude upward from the upper surface portion to fix the front frame of the wheelchair.

In one embodiment, the front wheel fixing portion, and the left and right fixing portion may be combined to be separated from each other. The left and right fixing parts may be fixed to each other through a detachable connection part.

In one embodiment, each of the left and right measurement parts may include a shaft part, a roller part, a sensor part, and a brake part. The shaft portion may be a center of rotation. The roller portion is fixed to the shaft portion, it can rotate in direct contact with the rear wheel of the wheelchair. The sensor unit may be fixed to the shaft unit and measure the torque and the rotation speed of the rear wheel of the wheelchair according to the rotation of the roller unit. The brake part may be fixed to the shaft part to adjust a rotational load of the shaft part.

In one embodiment, the roller unit may protrude to the outside through openings formed in each of the left and right upper surface portions of the left and right measurement units.

In one embodiment, the brake portion may be a powder brake.

In one embodiment, left and right control display parts disposed at the ends of each of the left and right fixing parts to control each of the left and right measuring parts or to display measurement data of each of the left and right measuring parts are further included. It may include.

In one embodiment, each of the left and right control display unit, the brake control unit for controlling the rotational load of the brake unit, the torque display unit for displaying the torque of the wheelchair rear wheel measured by the sensor unit, and the measured by the sensor unit It may include a rotation speed display unit for displaying the rotation speed of the wheelchair rear wheel.

According to the embodiments of the present invention, since the front wheel fixing portion of the front wheel of the wheelchair is seated and fixed, the wheelchair can be fixed without movement, thereby enabling stable data measurement.

In addition, the wheelchair can be easily moved onto the wheelchair dynamometer through the left and right slopes, thereby improving user convenience.

In addition, after fixing the left and right rear wheels of the wheelchair to the left and right fixing parts, respectively, the output can be measured by using the left and right measuring units to discriminate and improve the convenience of data analysis and wheelchair condition measurement.

In addition, the rotational load of the shaft portion rotating through the brake unit can be variously changed, and various experiments in consideration of the state of the ground, the inclined surface, etc. can be performed.

In addition, since the roller portion protrudes through the opening to contact the rear wheel of the wheelchair, it has a structure that is relatively simple and can improve the measurement reliability.

1 is a perspective view of a wheelchair dynamometer according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a wheelchair seated on the wheelchair dynamometer of FIG. 1.

3 is a perspective view illustrating a rear wheel fixing unit of the wheelchair dynamometer of FIG. 1.

4 is a perspective view illustrating a left control display of the wheelchair dynamometer of FIG. 1.

* Explanation of the sign

1: wheelchair 10: wheelchair dynamometer

100: front wheel fixing part 200: rear wheel fixing part

210: left fixing part 220: right fixing part

310: left measuring unit 320: right measuring unit

410: left inclined portion 420: right inclined portion

510: left control display 520: right control display

As the inventive concept allows for various changes and numerous modifications, the embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "consist of" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

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

1 is a perspective view of a wheelchair dynamometer according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a wheelchair seated on the wheelchair dynamometer of FIG. 1. 3 is a perspective view illustrating a rear wheel fixing unit of the wheelchair dynamometer of FIG. 1.

1, 2 and 3, the wheelchair dynamometer 10 according to the present embodiment is the front wheel fixing part 100, the rear wheel fixing part 200, the left and right measuring parts (310, 320), Left and

right inclination parts

410 and 420 and left and

right control indicators

510 and 520. In this case, the rear wheel fixing part 200 includes left and

right fixing parts

210 and 220.

The wheelchair dynamometer 10 has the left and

right fixing parts

210 and 220 connected to each other in the longitudinal direction, and the front wheel fixing part 100 in the center of the left and right fixing parts 210 and 220. ) Has a structure arranged. Further, the left and right

inclined portions

410 and 420 are disposed at the rear of the left and right fixing

portions

210 and 220, and the left and right ends of the left and right fixing

portions

210 and 220 respectively. Right control displays 510 and 520 are disposed.

In detail, the front wheel fixing part 100 includes an upper frame 111, a lower frame 112, a side frame 113, an upper surface part 114, and a front wheel support part 115.

The upper frame 111 and the lower frame 112 are respectively disposed in the upper and lower portions in a rectangular frame shape, and the edges of the upper frame 111 and the lower frame 112 are the side frames 113. This connects with each other.

The upper surface portion 114 is disposed on the upper surface of the upper frame 111, the front wheel support portion 115 protrudes upward from the upper surface portion 114. The front wheel 114 of the wheelchair is located on the upper surface 114, and the front frame 3 of the wheelchair is fixed to the front wheel support 115. In this case, a separate groove may be formed in the front wheel support part 115 to insert and fix the front frame 3 of the wheelchair.

Meanwhile, although not shown, the front frame 3 of the wheelchair may be variously modified according to the shape of the wheelchair. Accordingly, the position and shape of the front wheel support 115 may also fix the front frame 3. Can vary.

The left and right fixing

parts

210 and 220 are disposed on the left and right sides of the front wheel fixing part 100, respectively, and have the same symmetry except that the left and right rear wheels of the wheelchair are respectively located. It includes structures and components. Therefore, hereinafter, the left fixing part 210 will be described mainly, and the overlapping description of the right fixing part 220 will be omitted.

The left fixing part 210 includes a left upper frame 211, a left lower frame 212, a left side frame 213, a left space 214, a left upper surface part 215, and a left opening 216. .

In detail, the left upper frame 211 and the left lower frame 212 are respectively disposed on the upper and lower portions in a rectangular frame shape, and the edges of the left upper frame 211 and the lower left frame 212 are respectively. The left side frame 213 is connected to each other.

In addition, the left upper frame 211, the left lower frame 212, and the left side frame 213 form a left space 214 therein, and the left measurement unit 310 is located in the left space 214. ) Is stored.

The left upper surface portion 215 is disposed on an upper surface of the left upper frame 211 and includes a left opening 216. The left opening 216 is formed at a position where the left rear wheel 4 of the wheelchair is positioned, and the left roller part 311 of the left measuring part 310 protrudes upward through the left opening 216.

As described above, the right measuring part 320 is accommodated in the right space 224 of the right fixing part 220, and the right roller part 321 of the right measuring part 320 has a right opening (not shown). Protrudes upward through.

The left and right fixing

parts

210 and 220 may be disposed in the longitudinal direction in contact with each other, and the contact parts of the left and right fixing

parts

210 and 220 may be fixed through the connection part 230.

The connection part 230 may be, for example, a clamp that is easily removable, and thus the left and right fixing

parts

210 and 220 may be detached or attached as necessary.

The left and

right measurement units

310 and 320 are accommodated in the left and

right spaces

214 and 224, respectively, and include the same structure and components except that they are disposed symmetrically with each other. Therefore, hereinafter, the right measuring unit 320 will be described mainly, and the overlapping description of the left measuring unit 310 will be omitted.

The right measuring part 320 includes a right roller part 321, a right sensor part 322, a right brake part 323, and a right shaft part 324. In this case, the right roller 321, the right sensor 322, the right brake 323, and the right shaft 324 are all housed in the right space 224.

The right shaft portion 324 extends in one direction, that is, the direction parallel to the longitudinal direction in which the left and

right measurement units

310 and 320 are arranged, and becomes a central axis of rotation.

The right roller part 321 is fixed to the right shaft part 324 and protrudes through a right opening (not shown) of the right fixing part 220 so as to directly contact the right rear wheel 5 of the wheelchair. Thus, as the right rear wheel 5 of the wheelchair rotates, the right rear wheel 5 rotates in a direction opposite to the rotation direction of the right rear wheel 5.

The right sensor part 322 is fixed to the right shaft part 324 and measures the torque and the rpm of the right rear wheel 5 of the wheelchair according to the rotation of the right roller part 321. . That is, the right sensor unit 322 may include a torque sensor for measuring torque, and a rotation speed sensor for measuring the rotation speed.

The right brake portion 323 is fixed to the end of the right shaft portion 324 to adjust the rotational load of the right shaft portion 324. That is, the right brake unit 323 increases or decreases the rotational resistance of the right shaft unit 324 and changes the load of the right shaft unit 324. As described above, the load applied to the right shaft part 324 by the right brake part 323 is to assume various situations of the ground, such as increasing or decreasing frictional force of the ground, increasing or decreasing slopes, and the like.

Thus, verification and experimentation of how the torque and rotational speed of the right rear wheel 5 of the wheelchair change according to various situations of the ground may be possible, and the wheelchair dynamometer 10 may be utilized in a situation similar to the actual environment. Will be.

In this case, the right brake part 323 may be a powder brake. Thus, by using spherical powders of iron (Fe), aluminum (Al), and chromium (Cr) alloy as powder components, various control environments can be provided in excellent states of heat resistance, oxidation resistance, corrosion resistance, abrasion resistance, and the like.

In the case of the left and right

inclined portions

410 and 420, the inclined surface is provided so that the wheelchair 1 can easily move on the wheelchair dynamometer 10, respectively, of the left fixing portion 210. The left opening 216 and the right fixing part 220 are arranged in line with the right opening. Thus, the left and right

rear wheels

4 and 5 of the wheelchair moved on the left and right

inclined portions

410 and 420 may be located directly on the left and

right roller portions

311 and 321. .

The left and right

control display units

510 and 520 are disposed on upper ends of the left and right fixing

units

210 and 220, respectively, and control the left and

right measurement units

310 and 320, respectively. Except for displaying the measurement data of the left and

right measurement units

310 and 320, respectively, they are arranged symmetrically with each other and include the same structure and components. Therefore, hereinafter, the left control display unit 510 will be described mainly, and the overlapping description of the right control display unit 520 will be omitted.

Referring to FIG. 4, the left control display unit 510 includes a left brake control unit 512, a left torque display unit 513, and a left rotation speed display unit that are housed inside the left case 511 and the left case 511. 514).

The left brake control unit 512 controls the rotating load applied to the left shaft portion from the left brake portion, thereby increasing or decreasing the rotating load according to various road surface environments.

The left torque display unit 513 displays the torque of the left rear wheel 4 of the wheelchair measured by the left sensor unit, the left rotation speed display unit 514 is the wheelchair left rear wheel 4 measured by the left sensor unit The rotation speed of) is displayed.

In this case, the torque and the rotation speed of the left rear wheel 4 of the wheelchair may be checked in real time through the left torque display unit 513 and the left rotation speed display unit 514. Can be obtained.

According to the embodiments of the present invention as described above, since the front wheel fixing portion of the front wheel of the wheelchair is seated and fixed, the wheelchair can be fixed without movement, thereby enabling stable data measurement.

Wheelchairs dynamometers according to the present invention have industrial applicability that can be used to measure the power of a wheelchair.

Claims

A front wheel fixing part in which the front wheel of the wheelchair is fixed and fixed;

Left and right fixing portions in which each of a pair of rear wheels of the wheelchair are located, respectively defining left and right spaces therein; And

A wheelchair dynamometer, which is received in each of the left and right spaces and includes left and right measurement units for measuring the output of each of the pair of rear wheels.
The wheelchair dynamometer according to claim 1, further comprising left and right inclined portions disposed at the rear of each of the left and right fixing portions to form an inclined surface on which the wheelchair is moved.
The method of claim 1, wherein the front wheel fixing portion,

An upper surface on which the front wheel of the wheelchair is seated; And

Wheeler dynamometer characterized in that it comprises a front wheel support portion protruding upward from the upper surface portion is fixed to the front frame of the wheelchair.
The method of claim 1, wherein the front wheel fixing portion, and the left and right fixing portions are coupled to be separated from each other,

The left and right fixing parts are wheelchair dynamometer, characterized in that fixed to each other through a removable connection.
The method of claim 1, wherein each of the left and right measurement units,

An axis that is the center of rotation;

A roller unit fixed to the shaft unit and rotating in direct contact with the rear wheel of the wheelchair;

A sensor unit fixed to the shaft unit to measure torque and rotational speed of the rear wheel of the wheelchair according to the rotation of the roller unit; And

Fixed to the shaft portion, wheelchair dynamometer comprising a brake portion for adjusting the rotational load of the shaft portion.
The wheelchair dynamometer according to claim 5, wherein the roller part protrudes outward through openings formed in each of left and right upper surface parts of the left and right measurement parts.
6. The wheelchair dynamometer according to claim 5, wherein the brake part is a powder brake.
The display device of claim 5, further comprising left and right control displays disposed at ends of each of the left and right fixing parts to control each of the left and right measurement parts or to display measurement data of each of the left and right measurement parts. Wheelchair dynamometer which includes more.
The display apparatus of claim 8, wherein each of the left and right control displays includes:

A brake control unit controlling a rotational load of the brake unit;

A torque display unit displaying the torque of the rear wheel measured by the sensor unit; And

Wheelchair dynamometer characterized in that it comprises a rotation speed display unit for displaying the rotation speed of the wheelchair rear wheel measured by the sensor unit.