KR101586703B1

KR101586703B1 - Wheel unit for overcoming obstacles

Info

Publication number: KR101586703B1
Application number: KR1020140063429A
Authority: KR
Inventors: 권오원; 김철승; 이용구
Original assignee: 한국기계연구원
Priority date: 2014-05-27
Filing date: 2014-05-27
Publication date: 2016-01-19
Also published as: KR20150136252A

Abstract

The wheel unit for overcoming obstacles includes a wheel unit and a gear unit. The wheel portion includes a wheel portion and a tire portion. The gear unit includes a shaft portion coupled to a wheel portion of the wheel portion, and a gear portion coupled to an outer surface of the shaft portion to overcome an obstacle. The gear unit includes a coupling unit coupled to an outer surface of the shaft, and a plurality of protruding units protruding from the outer surface of the coupling unit at regular intervals.

Description

[0001] WHEEL UNIT FOR OVERCOMING OBSTACLES [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel unit, and more particularly, to a wheel unit for overcoming an obstacle which can be applied to a wheelchair or a vehicle for a welfare machine and can move beyond an obstacle or a jaw.

As the demand for the improvement of the convenience of the wheelchair or the welfare device vehicle used by the elderly or the disabled is increasing, various studies are being conducted. For example, since most wheelchair or welfare vehicles are moved by manual or low power driving, when wheelchair or welfare vehicles meet obstacles such as barriers, This is a required situation.

Japanese Laid-Open Utility Model Application No. 20-1999-0017342 discloses a technology that can relatively easily overcome obstacles by attaching a chain structure detachably attachable to the outer surface of a tire, And it is limited to be applied to vehicles for wheelchairs or welfare machines.

Korean Patent Application No. 10-2009-0040307 discloses a technology relating to an aluminum wheel for inline skates designed to allow a 'T' shaped outer ring wheel to pass through a barrier or an obstacle, And is formed by passing through the spokes of the outer ring, and is only a technique which is limitedly applied only to special applications such as inline skates.

As described above, a wheel structure that can be directly applied to a wheelchair or a welfare device vehicle to overcome an obstacle has not been disclosed, and the wheel structure for overcoming obstacles disclosed so far is applicable to a wheelchair or a vehicle for a welfare machine There are limitations in terms of ease of overcoming obstacles and user convenience.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a wheel unit for overcoming obstacles, wherein the ease of overcoming obstacles is improved and the user's convenience is improved.

The wheel unit for overcoming obstacles according to one embodiment for realizing the object of the present invention includes a wheel unit and a gear unit. The wheel portion includes a wheel portion and a tire portion. The gear unit includes a shaft portion coupled to a wheel portion of the wheel portion, and a gear portion coupled to an outer surface of the shaft portion to overcome an obstacle. The gear unit includes a coupling unit coupled to an outer surface of the shaft, and a plurality of protruding units protruding from the outer surface of the coupling unit at regular intervals.

In one embodiment, the coupling unit is fixed to the shaft portion and can rotate according to the rotation of the shaft portion.

In one embodiment, the maximum radius of the gear unit may be less than the radius of the wheel portion.

In one embodiment, the wheel portion may include a pair of first and second wheel portions coupled by the shaft portion.

In one embodiment, the gear unit may be fixed between the first and second wheels.

In one embodiment, the gear unit may be fixed to the outside of at least one of the first and second wheels.

In one embodiment, the protruding units protrude from the coupling unit in this shape of the gear to perform contact and engagement with the obstacle.

In one embodiment, each of the protruding units may extend vertically with respect to the coupling unit, the surface in contact with the obstacle.

In one embodiment, each of the protruding units may extend to a curved surface having a constant curvature, the surface in contact with the obstacle.

In one embodiment, each of the protruding units may include a base portion extending from the coupling unit, and an extension portion bent from the base portion in the rotational direction of the coupling unit with respect to the base portion.

In one embodiment, the gear portion may further include an extension unit detachable from the protruding unit in the extending direction from the coupling unit.

According to the embodiments of the present invention, the gear unit coupled to the wheel unit includes the protruding units, and the protruding units can overcome the obstacle through the engagement with the obstacle, so that the obstacle can be easily overcome, The ease of operation is improved.

Particularly, the engaging unit of the gear unit is fixed to the shaft portion and rotates together with the rotation of the wheel to overcome the obstacle. Alternatively, the shaft portion is driven by a separate motor to overcome the obstacle by rotation of only the gear unit The obstacle can be easily overcome in various environments.

In addition, since the maximum radius of the gear unit is smaller than the radius of the wheel part, the interference of the running on the tooth unit is minimized in an ordinary running without an obstacle, and the obstacle can be overcome by the gear unit only when coming into contact with the obstacle .

Meanwhile, since the gear unit is coupled to at least one of the pair of wheels or the outer surface, the variety of designs according to the use environment is improved, and the suitability for overcoming obstacles is improved.

In addition, the oblique surface of the protruding units in contact with the obstacle can be variously formed according to the type of the contact surface of the obstacle, such as a vertical plane or a curved surface, thereby improving the contact force with the obstacle, It is possible to prevent the obstacle from being difficult to overcome by rotating in the opposite direction to the obstacle and to overcome the obstacle more effectively.

In this case, the end portions of the protruding units may have a curved shape to facilitate obstacle overcoming.

Furthermore, the extension unit can be attached to and detached from the end of each of the protruding units, and when the height of the obstacle changes, it is possible to more easily overcome obstacles.

1 is a perspective view illustrating a wheel unit according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of the wheel unit of Fig. 1;
FIG. 3 is a perspective view showing a state in which the wheel unit of FIG. 1 overcomes a relatively low obstacle.
FIG. 4 is a perspective view showing a state in which the wheel unit of FIG. 1 overcomes a relatively high obstacle.
5 is a perspective view illustrating a wheel unit according to another embodiment of the present invention.
6A to 6C are front views showing a part of the gear units according to still another embodiment of the present invention.
7 is a front view showing a part of a gear unit according to another embodiment of the present invention.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover 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. The terms first, second, etc. 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 in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term "comprises" or "comprising ", etc. is intended to specify that there is a stated feature, figure, step, operation, component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, 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 to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

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

1 is a perspective view illustrating a wheel unit according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of the wheel unit of Fig. 1;

1 and 2, the wheel unit 1 according to the present embodiment includes a first wheel portion 10, a second wheel portion 20, and a gear unit 30.

The first wheel portion 10 and the second wheel portion 20 are connected to the first tire portion 11 and the first wheel portion 12 and the second tire portion 21 and the second wheel portion 22, And has the same structure and shape as conventional conventional wheels.

The gear unit 30 is coupled between the first and second wheel portions 10 and 20 and includes a shaft portion 31, a braking portion 32 and a gear portion 35, and the gear portion 35 Includes a coupling unit 33 and a protruding unit 34. [

In this embodiment, the gear unit 30 is shown to be coupled between the first and second wheels 10 and 20. Alternatively, the wheel unit 1 may be coupled to the first and second wheels 10, 10, and 20, that is, only one wheel portion, the gear unit 30 may be coupled to the outer surface of one wheel portion.

The shaft portion 31 connects the centers of the first and second wheel portions 12 and 22 of the first and second wheel portions 10 and 20 to form the first and second wheel portions 10 and 20, 20 and serves as a rotation axis of the first and second wheel portions 10, 20.

The braking unit 32 is fixed to the shaft 31 and applies braking force to the first and second wheels 10 and 20. [

Meanwhile, the first and second wheel portions 10 and 20 in the present embodiment can be applied to wheels of wheelchairs, wheels of transportation welfare apparatuses such as disabled persons or patients, and the scope of application is not limited.

The gear portion 35 is coupled to the outer surface of the shaft portion 31 and includes a coupling unit 33 and a protruding unit 34.

The gear portion 35 engages with the shaft portion 31 and rotates in accordance with the rotation of the shaft portion 31. That is, since the shaft portion 31 corresponds to the rotation axis of the first and second wheel portions 10 and 20, the gear portion 35 is synchronized with the first and second wheel portions 10 and 20 It can rotate.

Alternatively, although not shown, the shaft portion 31 may be provided with a separate rotation motor so that the gear portion 35 can rotate only at the time of driving the rotation motor of the shaft portion 31. In this case, 35 can rotate only when necessary, regardless of the rotation of the first and second wheels 10,

Specifically, the coupling unit 33 is coupled to the outer surface of the shaft portion 31, and the shaft portion 31 has a cylindrical shape. Therefore, the coupling unit 33 is formed in the shape of a ring, 31). The coupling unit 33 rotates about the rotation center axis of the shaft 31 according to the rotation of the shaft 31 or the rotation of the rotation motor provided on the shaft 31.

The protruding unit 34 protrudes in a direction toward the outside of the shaft portion 31 at regular intervals on the outer surface of the coupling unit 33. [ In this case, the projecting unit 34 may protrude from the coupling unit 33 in this shape of the gear. As shown in FIGS. 1 and 2, the protruding unit 34 has a rectangular or trapezoidal shape having a rectangular or trapezoidal cross section, and various shapes of the protruding unit 34 will be described later .

The maximum distance from the rotation center of the shaft portion 31 to the end surface of the protruding unit 34, that is, the maximum radius of the gear unit 30, It is smaller than the radius. Thus, the driving by the rotation of the first and second wheel portions 10 and 20 is not interrupted by the gear unit 30, particularly, the protruding unit 34 during normal operation.

FIG. 3 is a perspective view showing a state in which the wheel unit of FIG. 1 overcomes a relatively low obstacle.

As described above, the wheel unit 1 provided with the gear unit 30 is capable of moving the first and second wheel portions 10 and 20 of the first and second wheel portions 10 and 20, respectively, when passing through a normal ground without an obstacle. The second tire portions 11 and 21 are brought into contact with the ground. In this case, since the radius of the protruding unit 34 of the gear unit 30 is small, the state in which the protruding unit 34 is not in contact with the ground is maintained.

3, when the wheel unit 1 is interfered by the relatively low height obstacle 41 (when the height of the obstacle 41 is smaller than the width between the protruding units 34) The first and second tire portions 11 and 21 are compressed according to the height of the obstacle 41 and the first and second tire portions 11 and 21 are compressed according to the compression of the first and second tire portions 11 and 21. [ So that the protruding unit 34 comes into contact with the obstacle 41.

In this case, since the height of the obstacle 41 is smaller than the width between the protruding units 34, the obstacle 41 is positioned between the adjacent protruding units 34, The obstacles 41 located between the protruding units 34 are engaged between the protruding units 34 as a result of the rotation of the protruding units 34. As a result, .

Since the protruding units 34 can rotate in synchronization with the rotation of the first and second wheel units 10 and 20, the first and second wheel units 10 and 20 can be rotated by the protruding units 34, (34) can pass through the obstacle (41) at the same time as overcoming the obstacle (41).

Alternatively, the protruding units 34 may be rotated by a rotation motor provided separately on the shaft 31 to overcome the obstacle 41, and the protruding units 34 may be rotated separately, The first and second wheels 10 and 20 can pass through the obstacle 41 after overcoming the obstacle 41.

FIG. 4 is a perspective view showing a state in which the wheel unit of FIG. 1 overcomes a relatively high obstacle.

4, when the wheel unit 1 is interfered by the obstacle 42 having a relatively high height (the height of the obstacle 42 is larger than the width between the protruding units 34) A relatively large amount of the first and second tire portions 11 and 21 is compressed by the height of the obstacle 41 and the compression of the first and second tire portions 11 and 21 30 are brought into contact with the obstacle 41.

In this case, since the height of the obstacle 41 is greater than the width between the protruding units 34, the obstacle 41 comes into contact with the closest one protruding unit 34, The obstacle 41 is overcome in accordance with the rotation of the obstacle.

Likewise, since the protruding unit 34 can rotate in synchronism with the rotation of the first and second wheel portions 10 and 20, the first and second wheel portions 10 and 20 can be rotated by the protruding unit 34 Can overcome the obstacle 41 and can pass through the obstacle 41 and proceed.

Alternatively, the protruding unit 34 may be rotated by a rotation motor provided separately on the shaft 31 to overcome the obstacle 41, and the protruding unit 34 may be rotated separately to move the obstacle 41 The first and second wheel portions 10 and 20 can pass through the obstacle 41 and proceed.

Preferably, the end of the protruding unit 34 includes an elastic material or a relatively shock-absorbable material so as to damage the obstacle or to minimize damage from the obstacle in the course of overcoming the obstacle.

5 is a perspective view illustrating a wheel unit according to another embodiment of the present invention.

Since the wheel unit 2 according to the present embodiment is substantially the same as the wheel unit 1 described with reference to Figs. 1 to 4 except for the engagement position of the gear unit, the same reference numerals Use duplicate descriptions and omit them.

Referring to FIG. 5, in the wheel unit 2 according to the present embodiment, the first and second wheels 10 and 20 are fixed so as to be adjacent to each other, and the gear unit includes the first and second wheels (10, 20).

In this case, the gear unit may be coupled to at least one of the outer surfaces of the first and second wheel portions 10 and 20. Hereinafter, the first and second wheel portions 10 and 20 A description will be given of the combination of the two.

That is, the first gear unit 50 is coupled to the outer surface of the first wheel unit 10, and the second gear unit 60 is coupled to the outer surface of the second wheel unit 20.

The first gear unit 50 includes a first shaft portion 51 and a first gear portion 55. The first gear portion 55 includes a first coupling unit 53 and a first protruding unit 54 ). Similarly, the second gear unit 60 includes a second shaft portion and a second gear portion 65, and the second gear portion 65 includes a second coupling unit 63 and a second projection unit 64, .

The first gear unit 50 is connected to the first wheel unit 10 through the first shaft unit 51 and the second gear unit 60 is connected to the second wheel unit 10 via the second shaft unit. (20), and the first and second shaft portions may be formed integrally with one shaft.

Meanwhile, although not shown, the first shaft portion 51 may include a separate rotation motor to rotate the first gear unit 50 separately from the first wheel portion 10, It is possible to rotate the second gear unit 60 separately from the second wheel unit 20 by providing a separate rotation motor.

The first engaging unit 53 of the first gear portion 55 and the second engaging unit 63 of the second gear portion 65 have a structure and a shape similar to those of the engaging unit 33 described with reference to Fig. The first protruding unit 54 of the first gear portion 55 and the second protruding unit 64 of the second gear portion 65 are also the same as the protruding unit 34 described with reference to FIG. And thus the description thereof is omitted.

In this embodiment, since the first and second toothed portions 55 and 65 are respectively coupled to the outer surfaces of the first and second wheels 10 and 20, the overcoming force of the obstacle is improved, The stability of the city can be improved.

6A to 6C are front views showing a part of the gear units according to still another embodiment of the present invention.

6A, the gear unit 60 according to the present embodiment has a structure in which one surface of a protruding unit 64 extending from the engaging unit 63 extends perpendicularly to the extending surface of the engaging unit 63 .

That is, the protruding unit 64 includes a first surface 66 and a second surface 67, and the first surface 66 extends perpendicularly to the extending surface of the coupling unit 63. When the first surface 64 is formed perpendicular to the coupling unit 63 as described above, the obstacle 43, which is engaged with the protruding unit 64 when the obstacle 43 has a rectangular shape, The obstacle 43 fixed to the protruding unit 64 can be prevented from being obstructed by the protruding unit 63 even if the rotational force is reduced due to the output decrease of the engaging unit 63 during the process of overcoming the obstacle 43. [ 64).

In this case, if the second surface 64 also extends perpendicularly to the extending surface of the coupling unit 63, the fixing force to the obstacle 43 can be further improved.

6B, the gear unit 70 according to the present embodiment has a configuration in which one surface of the protruding unit 74 extending from the coupling unit 73 is curved with respect to the extending surface of the coupling unit 73 .

That is, the protruding unit 74 includes a first surface 76 and a second surface 77, and the first surface 76 is a curved surface having a predetermined curvature with respect to the extending surface of the coupling unit 73, . When the first surface 74 is formed as a curved surface with respect to the engaging unit 73 as described above, when the obstacle 44 has a curved shape such as a circular shape, the obstacle 44 engaged with the protruding unit 74 The obstacle 44 is fixed to the protruding unit 74 even if the rotational force is reduced due to a decrease in the output of the engaging unit 73 in the course of overcoming the obstacle 44. [ And is not separated from the protruding unit 74.

In this case, if the second surface 74 is also curved with respect to the extending surface of the coupling unit 73, the fixing force to the obstacle 44 can be further improved.

6C, in the gear unit 80 according to the present embodiment, the protruding unit 84 includes a base portion 86 extending from the engaging unit 83, and an extending portion 86 extending from the base portion 86. [ (87).

The base portion 86 has the shape of a quadrangular prism or a trapezoid prism having the same shape as the protruding unit 34 described with reference to Fig. Unlike the protruding unit 34 of FIG. 1, the extending portion 87 extending from the base portion 86 extends to be bent at a predetermined angle with respect to the base portion 86.

That is, the extension portion 87 extends from the base portion 86 so as to be bent at a predetermined angle with respect to the base portion 86 in the same direction as the rotation direction of the coupling unit 82. Thus, the protruding unit 84 is formed in a hook shape as a whole.

When the protruding unit 84 is formed in the shape of a hook, the contact force with the obstacle 45 is improved, so that the obstacle 45 can be easily overcome.

7 is a front view showing a part of a gear unit according to another embodiment of the present invention.

7, the gear unit 90 according to the present embodiment further includes an expansion unit 98, in addition to the engagement unit 93 and the protrusion unit 94,

The coupling unit 93 and the projecting unit 94 are the same as the coupling unit 33 and the projecting unit 34 described with reference to Fig. However, the expansion unit 98 can be attached to and detached from the end of the protrusion unit 34.

Accordingly, when the height of the obstacle to be overcome is larger than the height of the protruding unit 34, the enlarging unit 98 can be attached to the end of the protruding unit 34 to relatively easily overcome the obstacle .

According to the embodiments of the present invention as described above, the gear unit coupled to the wheel unit includes the protruding units, and the protruding units can overcome the obstacle through the engagement with the obstacle, so that the obstacle can be easily overcome The convenience of the user's operation is improved.

The wheel unit according to the present invention has industrial applicability that can be used in a wheel part of a vehicle for a wheelchair or a welfare machine.

1, 2: wheel unit 10: first wheel part
20: second wheel portion 30, 60, 70, 80, 90:
31: shaft portion 32:
33, 63, 73, 83, 93: coupling unit 34, 64, 74, 84, 94:
35, 65, 75, 85, 95: gear portion 66, 76: first surface
67, 77: second side 86: base portion
87: extension part 98: expansion unit
50: first gear unit 51: first shaft portion
53: first coupling unit 54: first protrusion unit
55: first gear unit 60: second gear unit
63: second coupling unit 64; The second projecting unit
65: second gear portion 41, 42, 43, 44, 45: obstacle

Claims

A wheel portion including a pair of first and second wheel portions each including a wheel portion and a tire portion; And
A gear portion coupled to an outer surface of the shaft portion to overcome an obstacle and having a maximum radius smaller than a radius of each of the first and second wheel portions,
Wherein the gear unit includes a coupling unit coupled to an outer surface of the shaft unit and rotating according to rotation of the shaft unit, and a plurality of protruding units protruding from the outer surface of the coupling unit at regular intervals,
Wherein each of the protruding units includes a material that protrudes from the coupling unit in this shape of a quadratic post or a trapezoidal columnar gear and performs elastic contact or shock absorption with direct contact with and engaging with the obstacle,
The first and second wheel portions are compressed when in contact with the obstacle so that the protruding units of the gear unit are relatively protruded relative to the first and second wheel portions to directly contact and engage with the obstacle, Wherein the protruding units overcome the obstacle.

delete

The method according to claim 1,
And the gear unit is fixed between the first and second wheels.

The method according to claim 1,
Wherein the gear unit is fixed to the outside of at least one of the first and second wheels.

delete

The apparatus of claim 1, wherein each of the protruding units comprises:
And a surface in contact with the obstacle extends perpendicularly to the coupling unit.

The apparatus of claim 1, wherein each of the protruding units comprises:
Wherein the surface contacting the obstacle extends to a curved surface having a constant curvature.

The apparatus of claim 1, wherein each of the protruding units comprises:
A base portion extending from the coupling unit; And
And an extension portion extending from the base portion in a direction of rotation of the coupling unit with respect to the base portion.

The apparatus according to claim 1,
Further comprising an expanding unit capable of being attached to and detached from the protruding unit in the extending direction from the engaging unit.