Hubless wheels allowing shaft-based movement

Abstract

Hubless wheels allowing shaft-based movement according to an embodiment of the present invention have an improved mechanical structure of the wheel and thus can easily climb stairs or obstacles. The hubless wheels allowing shaft-based movement according to an embodiment of the present invention enable elderly people, children, disabled persons, and the like to climb obstacles having stepped regions such as curbs and stairs without assistance, and thus has the effect of reducing inconvenience in everyday life. The hubless wheels allowing shaft-based movement according to an embodiment of the present invention can be applied to transportation means of any field, such as wheelchairs, baby carriages, carts, and robots, and thus can be widely used and provide everyday convenience.

Description

Hubless wheels with axle movement

[0001] The present invention relates to a wheel, and more particularly, to a hubless wheel that improves the mechanical structure of the wheel and performs axis movement to easily climb stairs or obstacles.

[0002] In modern society, wheels are widely used as an indispensable component, and are applied to various devices such as wheelchairs, strollers, carts, and robots for the convenience of life.

[0003] In general, a wheel is an example of one that has a tube inside that adjusts the elasticity of the outside of the wheel with air pressure, but in the case of small wheels with a small diameter, it is made of a material such as urethane or rubber installed on the outside of the wheel.

[0004] The wheeled method of transportation is efficient, relatively fast, and provides a wide contact surface area with the ground, allowing for stable driving.

[0005] When wheels roll on the ground or road surface, you can see that the wheels are directly affected by the shape of the ground.

[0006] However, although general circular wheels are very efficient for driving on flat surfaces, they have difficulty climbing obstacles with steps such as bumps and stairs, or passing through various obstacles.

[0007] When people with disabilities use wheelchairs to climb obstacles with steps, such as steps or stairs, they find it difficult to climb them on their own. They need help from others or make tremendous efforts to move, which leads to inconveniences and restrictions in their daily lives.

[0008] The technology underlying the present invention is disclosed in Korean Patent Registration No. 10-1211786.

[0009] In order to solve such problems, the purpose of the present invention is to provide a hubless wheel that can easily climb stairs or obstacles by improving the mechanical structure of the wheel and moving the axis.

[0010] The wheel according to the features of the present invention to achieve the above purpose is,

[0011] Outer wheels that move in contact with the ground;

[0012] An inner wheel that rotates along the inner surface of the outer wheel while being coupled to prevent it from being detached from the inner side of the outer wheel; and

[0013] It includes a moving wheel that is connected to the inside of the inner wheel so as not to be separated, forms an eccentric rotating part that is connected to an external fixture by positioning a longitudinal rotating axis at the bottom, and connects a spring member to one side of the eccentric rotating part.

[0014] The spring member has one side coupled to the fixed object, and the other side coupled to one side of the inner wheel, and maintains the movable wheel, the inner wheel, and the outer wheel as a whole at a certain angle when moving on a flat surface, and when the outer wheel stops rotating upon encountering an obstacle, the movable wheel rotates and when the rotation axis and the eccentric rotation part rise above the obstacle, tension and inertial force are applied to pull up the movable wheel and move the center of gravity of the outer wheel forward so that the movable wheel can go over the obstacle.

[0015] The eccentric rotating part is formed by extending from the inner bottom surface at a certain height at the lower center of the moving wheel, and the central axis of the moving wheel is eccentric to one side.

[0016] The eccentric rotating member forms a longitudinal through hole that horizontally penetrates one surface and the other surface of the moving wheel, and attaches the spring member to the outer surface of the through hole on one surface of the moving wheel.

[0017] The wheel further includes a moving wheel rising portion in which a circular rod of a fixed length passes through the longitudinal through hole, a first circular bearing and a second circular bearing are fitted on one side of the through hole and the other side of the through hole, the circular rod passes through the second bearing, the first bearing, and one side of the through hole and extends outward by a fixed length, and an extended end of the circular rod is coupled to the fixed object.

[0018] The spring member includes a coil spring wound in a spiral shape like a coil, a first spring pin of a predetermined length that is bent from one end of the coil spring and extends upward, and a second spring pin of a predetermined length that is bent from the other end of the coil spring and extends horizontally, and the second spring pin is formed parallel to the circular rod at a predetermined distance from the upper portion of the circular rod and is fixed to the fixture.

[0019] By the above-described configuration, the present invention has the effect of reducing inconvenience in daily life by enabling the elderly, children, and the disabled to climb obstacles with steps such as steps and stairs by themselves.

[0020] The present invention has the effect of providing widespread distribution and convenience in life by allowing wheels to be applied to any field of transportation, such as wheelchairs, baby strollers, carts, and robots.

[0021] The present invention has the effect of preventing the moving wheel from rotating along the inner surface of the outer wheel by a spring member when the wheel is lifted into the air, thereby preventing the moving wheel from moving back and forth up and down.

[0022] FIG. 1 is a drawing showing the outer appearance of a hubless wheel that moves an axis according to an embodiment of the present invention.

[0023] FIG. 2 is a drawing showing an enlarged view of a wheel coupled to a fixture according to an embodiment of the present invention.

[0024] Figure 3 is a drawing showing the configuration of a wheel according to an embodiment of the present invention.

[0025] FIG. 4 is a drawing showing a partial disassembly of a wheel according to an embodiment of the present invention.

[0026] Figure 5 is an exploded perspective view showing the configuration of a wheel according to an embodiment of the present invention.

[0027] Figure 6 is a drawing showing the configuration of a moving wheel and a moving wheel raising portion according to the first embodiment of the present invention.

[0028] Fig. 7 is a drawing showing the configuration of a moving wheel and a moving wheel raising part according to a second embodiment of the present invention.

[0029] FIG. 8 is a cross-sectional view of a device combining a moving wheel and a moving wheel lifting portion according to an embodiment of the present invention.

[0030] Fig. 9 is a drawing showing the configuration of a bearing member in a wheel according to an embodiment of the present invention.

[0031] Fig. 10 is a drawing showing a wheel moving according to an embodiment of the present invention.

[0032] A hubless wheel that moves an axis according to one embodiment of the present invention,

[0033] Outer wheels that move in contact with the ground;

[0034] An inner wheel that rotates along the inner surface of the outer wheel and is coupled to the inner side of the outer wheel so as not to be separated from the inner side of the outer wheel; and

[0035] It includes a moving wheel that is connected to the inside of the inner wheel so as not to be separated, forms an eccentric rotating part that is connected to an external fixture by positioning a longitudinal rotating axis at the bottom, and connects a spring member to one side of the eccentric rotating part.

[0036] The spring member has one side coupled to the fixed object, and the other side coupled to one side of the inner wheel, and maintains the movable wheel, the inner wheel, and the outer wheel as a whole at a certain angle when moving on a flat surface, and when the outer wheel stops rotating upon encountering an obstacle, the movable wheel rotates and when the rotation axis and the eccentric rotation part rise above the obstacle, tension and inertial force are applied to pull up the movable wheel and move the center of gravity of the outer wheel forward so that the vehicle can go over the obstacle.

[0037] For example, the eccentric rotating part is formed by extending from the inner bottom surface at a certain height at the lower center of the moving wheel, and the central axis of the moving wheel can be eccentric to one side.

[0038] For example, the eccentric rotating part may form a longitudinal through hole that horizontally penetrates one side and the other side of the moving wheel, and a circular coupling hole that couples the spring member to the outer circumference of the through hole may protrude from one side of the moving wheel.

[0039] For example, a rotary shaft in the form of a rod of a constant length passes through the longitudinal through hole, a first circular bearing and a second circular bearing are fitted on one side of the through hole and the other side of the through hole, and the rotary shaft extends outward by a constant length through the second bearing, the first bearing, and one side of the through hole, and an extended end of the rotary shaft can be coupled to the fixture.

[0040] For example, the spring member includes a spring wound in a spiral shape, a first spring pin of a predetermined length that is bent from one end of the spring and extends upward, and a second spring pin of a predetermined length that is bent from the other end of the spring and extends horizontally, and the second spring pin is formed parallel to the rotational axis at a predetermined distance above the rotational axis and can be coupled to the fixture.

[0041] For example, the first spring pin can be inserted into a hole formed in the upper portion of the eccentric rotating part and vertically erected so as to be exposed to the outside.

[0042] For example, the hubless wheel performing the above-described axis movement may further include a plurality of bearing members between the inner wheel and the moving wheel.

[0043] For example, the hubless wheel that moves the axis may further include a bearing fastening ring that forms a hollow portion having a diameter larger than the diameter of the moving wheel so as to be fitted into the outer surface of the moving wheel, and inserts a bearing member at regular intervals.

[0044] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. Throughout the description of each drawing, similar reference numerals have been used to designate similar components.

[0045] Terms such as "first," "second," "A," and "B" may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, the first component could be referred to as the "second component," and similarly, the second component could also be referred to as the "first component."

[0046] The term "and / or" includes any combination of multiple related listed items or any one of multiple related listed items.

[0047] A component is "connected" or "connected" to another component., When a component is referred to as being, it should be understood that it may be directly connected or connected to another component, but that there may be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0048] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0049] Unless otherwise defined, 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 pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0050] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present invention, identical reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted.

[0051] FIG. 1 is a drawing showing the external appearance of a hubless wheel that moves an axis according to an embodiment of the present invention, FIG. 2 is a drawing showing an enlarged view of a wheel coupled to a fixture according to an embodiment of the present invention, FIG. 3 is a drawing showing the configuration of a wheel according to an embodiment of the present invention, FIG. 4 is a drawing showing a partial disassembly of a wheel according to an embodiment of the present invention, FIG. 5 is an exploded perspective view showing the configuration of a wheel according to an embodiment of the present invention, FIG. 6 is a drawing showing the configuration of a moving wheel and a moving wheel raising portion according to a first embodiment of the present invention, FIG. 7 is a drawing showing the configuration of a moving wheel and a moving wheel raising portion according to a second embodiment of the present invention, FIG. 8 is a drawing showing a cross-section of a device combining a moving wheel and a moving wheel raising portion according to an embodiment of the present invention, and FIG. 9 is a drawing showing the configuration of a bearing member in a wheel according to an embodiment of the present invention.

[0052] A hubless wheel (100) that moves an axis according to an embodiment of the present invention includes an outer wheel (110), an inner wheel (120), and a moving wheel (130).

[0053] The wheel (100) includes an outer wheel (110) and an inner wheel (120) that is coupled to the inner side of the outer wheel (110) so as not to be separated and rotates along the inner surface of the outer wheel (110).

[0054] The inner wheel (120) is manufactured as a hollow body made of a material such as stainless steel or a high-strength aluminum alloy in a circular ring shape, and is not limited thereto, but may be made of a metal material having excellent physical and mechanical properties such as durability and strength, and the cross-sectional shape of the hollow body is also generally circular.

[0055] The outer wheel (110) is in contact with the ground and moves freely.

[0056] The outer wheel (110) has a first wheel body (111) in the shape of a ring forming a first hollow portion (1113) on the inside, and one or more first rotation grooves (112) are formed along one side of the inner surface of the first wheel body (111).

[0057] The inner wheel (120) is coupled to the inner side of the outer wheel (110) so as not to be separated and rotates along the inner surface of the outer wheel (110).

[0058] The inner wheel (120) has a ring-shaped second wheel body (121) that forms a second hollow portion (121a) on the inside, and forms one or more second rotation grooves (122) along one side of the inner surface of the second wheel body (121), and forms one or more third rotation grooves (123) along one side of the outer surface.

[0059] The moving wheel (130) has a ring-shaped third wheel body (131) that forms a third hollow portion (131a) on the inside, and one or more grooves (132, 133) are formed along one side of the outer surface of the third wheel body (131).

[0060] More specifically, a fourth circular rotation groove (132) is formed along the center of the outer surface of the third wheel body (131), and a fifth circular rotation groove (133) is formed along both edges.

[0061] The bearing fastening ring (140) is formed in a ring shape with a hollow portion (141) having a diameter larger than that of the third wheel body (131), and is fitted to the outer surface of the third wheel body (131), and a 'U'-shaped protrusion (143) is formed so that a 'U'-shaped hole (142) extending in a straight direction on one side and having one side open is formed, and the protrusions (143) are repeatedly formed at regular intervals along the circular rim. A bearing member (144) can be fitted into each 'U'-shaped hole (142).

[0062] When the bearing fastening ring (140) is fitted to the outer surface of the third wheel body (131), a plurality of holes (142) are positioned in the circular fourth rotation groove (132), and a circular ring (145) having a hollow portion (145a) formed in the center in the open direction of the 'U'-shaped hole (142) is fitted to close the open area of ​​the 'U'-shaped hole (142).

[0063] The circular ring (145) performs the function of preventing the bearing member (144) from falling out when fitted into the 'U'-shaped hole (142).

[0064] On the outer surface of the third wheel body (131), a ring-shaped sealing member (146, 147) is fitted and joined to a fifth circular rotation groove (133) formed along both edges.

[0065] The moving wheel (130) is coupled to the inside of the inner wheel (120) so as not to be detached, and forms an eccentric rotating part (134) that is coupled to an external fixed object (10) by forming a longitudinal rotating axis (151) at the bottom, and a spring member (154) is coupled to one side of the eccentric rotating part (134).

[0066] The moving wheel (130) extends from the inner bottom surface at a certain height at the lower center to form an eccentric rotating part (134) in the shape of an arc, and the central axis of the moving wheel (130) is eccentric to one side by the eccentric rotating part (134).

[0067] The eccentric rotating part (134) forms a longitudinal through hole (135) that horizontally penetrates one side and the other side of the moving wheel (130), and a circular coupling hole (136) that couples a spring member (154) to the outer surface of the through hole (135) protrudes from one side of the moving wheel (130).

[0068] The moving wheel rising part (150) includes a rotation shaft (151), a first bearing (152), a second bearing (153), and a spring member (154).

[0069] The moving wheel rising part (150) has a rotating shaft (151) in the shape of a rod of a constant length that passes through a longitudinal through hole (135), and a first circular bearing (152) and a second circular bearing (153) are fitted on one side of the through hole (135) and the other side of the through hole (135), and the rotating shaft (151) passes through the second bearing (153), the first bearing (152), and one side of the through hole (135) and extends outward to a constant length, and the extended end of the rotating shaft (151) is coupled to a fixed object (10).

[0070] The fixture (10) is connected to a wheel (100) and may represent a bracket configured for a wheelchair, cart, cart, or other transport vehicle.

[0071] The diameter of the first bearing (152) can be formed larger than the diameter of the second bearing (153).

[0072] The spring member (154) includes a coil spring (154a) that is wound in a spiral shape like a coil to recover a certain elasticity and have a force that resists compression, a first spring pin (154b) of a certain length that is bent from one end of the coil spring (154a) and extends upward, and a second spring pin (154c) of a certain length that is bent from the other end of the coil spring (154a) and extends horizontally.

[0073] When the outer wheel (110) encounters an obstacle and the inner wheel (120) rotates to exceed a certain angle with the fixed object (10), the spring tension increases, preventing the inner wheel (120) and the rotation axis (151) from rotating freely any longer, allowing the outer wheel (110) to follow the outer surface of the obstacle, thereby easily climbing the high point of the obstacle.

[0074] The spring member (154) prevents the wheel (100) from sagging and maintains its posture without going down below the rotation axis (151) due to the force of gravity when the fixture (10) is lifted into the air for moving equipment connected to the fixture (10), thereby enabling the user to move easily.

[0075] The spring member (154) has the function of absorbing shock when the rotation axis (151) of the inner wheel (120) is maintained at a certain distance from the ground by the spring tension.

[0076] The second spring pin (1540) is formed parallel to the rotation axis (151) at a certain distance above the rotation axis (151) and is coupled to the fixture (10).

[0077] Although the present invention exemplifies a coil spring (154a), it is not limited thereto and may include various springs such as elastic springs and compression springs.

[0078] When force is applied to the first spring pin (154b) from the left and right, the spring member (154) generates tension that resists in the opposite direction to the force applied by the coil spring (154a).

[0079] The spring member (154) is fitted into a circular joint (136) formed on one side of the through hole (135) and is coupled, and the first spring pin (1545) is inserted into a hole (134a) formed on the upper part of the eccentric rotating part (134) in the shape of an arc and is vertically erected and exposed to the outside.

[0080] As shown in Fig. 9, the moving wheel (130) can rotate along the inner surface of the inner wheel (120) by the bearing member (144) formed on the outer surface of the third wheel body (131).

[0081] A plurality of bearing members (144) can be placed between the inner wheel (120) and the moving wheel (130).

[0082] The bearing fastening ring (140) forms a hollow portion (131&) having a diameter larger than the diameter of the moving wheel (130) so as to be fitted onto the outer surface of the moving wheel (130), and a bearing member (144) is inserted at regular intervals.

[0083] The wheel (100) of the present invention can be used as a replacement for existing wheels, and can easily overcome stairs or obstacles due to improved mechanical structure, and is excellent in economic efficiency due to its simple structure.

[0084] The wheel (100) of the present invention can manually overcome obstacles by using an eccentric rotating part (134), a moving wheel rising part (150), and a spring member (154), but is not limited thereto, and can be applied to electric power by applying a motor.

[0085] Fig. 10 is a drawing showing a wheel moving according to an embodiment of the present invention.

[0086] The spring member (154) is fixed on one side to a fixed object (10), and when moving on a flat surface, it maintains the moving wheel (130), the inner wheel (120), and the outer wheel (110) as a whole at a certain angle, and when an obstacle is encountered and the rotation of the outer wheel (110) is stopped, the moving wheel (130) rotates, and when the rotation axis (151) and the eccentric rotation part (134) rise above the obstacle, tension and inertial force are applied to pull up the moving wheel (130) and move the center of gravity of the outer wheel (110) forward, so that the function of going over the obstacle can be performed.

[0087] When the outer wheel (110) of the wheel (100) hits an obstacle, the eccentric rotating part (134) rises above the obstacle, and tension and inertial force are applied by the spring member (154) to raise the moving wheel (130) above the obstacle, and the center of gravity of the outer wheel (110) moves forward to go over the obstacle.

[0088] The operations according to the embodiments of this specification can be implemented as computer-readable programs or codes on a computer-readable recording medium. Computer-readable recording media include all types of recording devices that store data that can be read by a computer system. Furthermore, computer-readable recording media can be distributed across network-connected computer systems, allowing computer-readable programs or codes to be stored and executed in a distributed manner.

[0089] When the embodiment is implemented in software, the above-described technique may be implemented as a module (process, function, etc.) that performs the above-described function. The module may be stored in memory and executed by the processor. The memory may be internal or external to the processor and may be connected to the processor by various well-known means.

[0090] Additionally, the computer-readable recording medium may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. The program instructions may include not only machine language code, such as that produced by a compiler, but also high-level language code that can be executed by the computer using an interpreter, etc.

[0091] While some aspects of the invention have been described in the context of an apparatus, they may also represent a description of a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be represented as a feature of a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most significant method steps may be performed by such a device.

[0092] In embodiments, a programmable logic device (e.g., a field programmable gate array) may be used to perform some or all of the functions of the methods described herein. In embodiments, the field programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described herein. In general, the methods are preferably performed by some hardware device.

[0093] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

[0094] The present invention can be used in various industrial fields such as wheelchairs, baby carriages, carts, and robots to which wheels can be applied.

Claims

1. Outer wheels that move in contact with the ground; An inner wheel that rotates along the inner surface of the outer wheel and is coupled to the inner side of the outer wheel so as not to be separated from the inner side of the outer wheel; and It includes a moving wheel that is connected to the inside of the inner wheel so as not to be separated, forms an eccentric rotating part that is connected to an external fixture by positioning a longitudinal rotating axis at the bottom, and connects a spring member to one side of the eccentric rotating part. The spring member is a wheel having one side joined to the fixed object and the other side joined to one side of the inner wheel, and which maintains the movable wheel, the inner wheel, and the outer wheel as a whole at a certain angle when moving on a flat surface, and when the outer wheel stops rotating upon encountering an obstacle, the movable wheel rotates and when the rotation axis and the eccentric rotation part rise above the obstacle, tension and inertial force are applied to pull up the movable wheel and move the center of gravity of the outer wheel forward to go over the obstacle.

2. In paragraph 1, The above eccentric rotating part is formed by extending from the inner bottom surface at a certain height at the lower center of the above moving wheel, and the central axis of the above moving wheel is eccentric to one side.

3. In paragraph 1, A wheel in which the above eccentric rotating part forms a longitudinal through hole that horizontally penetrates one side and the other side of the moving wheel, and a circular coupling hole protrudes from the outer surface of the through hole on one side of the moving wheel to couple the spring member.

4. In paragraph 3, A wheel in which a rod-shaped rotary shaft of a constant length passes through the longitudinal through hole, a first circular bearing and a second circular bearing are fitted on one side of the through hole and the other side of the through hole, the rotary shaft passes through the second bearing, the first bearing, and one side of the through hole and extends outward by a constant length, and an extended end of the rotary shaft is coupled to the fixture.

5. In paragraph 1, The above spring member includes a spring wound in a spiral shape, a first spring pin of a predetermined length that is bent from one end of the spring and extends upward, and a second spring pin of a predetermined length that is bent from the other end of the spring and extends horizontally, and the second spring pin is formed parallel to the rotation axis at a predetermined distance above the rotation axis and is coupled to the fixed body.

6. In paragraph 5, The above first spring pin is inserted into a hole formed in the upper part of the eccentric rotating part, and is a wheel that is vertically erected and exposed to the outside.

7. In paragraph 1, A wheel further comprising a plurality of bearing members between the inner wheel and the moving wheel.

8. In paragraph 1, A wheel further comprising a bearing fastening ring that forms a hollow portion having a diameter larger than the diameter of the moving wheel so as to be fitted onto the outer surface of the moving wheel, and inserts a bearing member at regular intervals.

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