Wheel for climbing steps

Abstract

If the wheels for climbing steps encounter an obstacle in the moving process of the wheels, rotation of the outer peripheral wheel stops, the inner peripheral wheel rotates through driving force of the motor, and when a motor shaft ascends to the upper portion of the obstacle, tension of the spring acts to pull the wheels, so that the wheels can easily climb the obstacle. The invention is applicable to wheels of moving tools such as wheelchairs, baby carriages, carts and the like, and has the effect of providing convenience for easily climbing obstacles such as steps, stairs and the like.

Description

Technical Field

[0001] This invention relates to a wheel for climbing stairs, and more specifically, to a wheel that, when encountering an obstacle during its movement, stops rotating the outer circumferential wheel, while the inner circumferential wheel rotates under the driving force of a motor. When the motor shaft rises above the obstacle, the tension of a spring comes into play to pull the wheel, thereby enabling the wheel to easily climb over obstacles. Background Technology

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

[0003] Generally speaking, a wheel has an internal tube that uses air pressure to adjust the external elasticity of the wheel. This is just one example. Smaller wheels with smaller diameters are made of polyurethane or rubber materials mounted on the outer diameter of the wheel.

[0004] The use of wheels for movement is both efficient and fast, and the wide contact area with the ground allows for stable travel.

[0005] It can be seen that when a wheel rolls on the ground or road surface, the influence of the ground on the wheel depends on the shape of the ground.

[0006] However, while ordinary round wheels are efficient on flat ground, they are difficult to climb steps, stairs, or other obstacles with varying heights or pass through various obstacles.

[0007] When people with disabilities use wheelchairs to climb steps and stairs or other obstacles with varying heights, they often find it difficult to do so on their own and need the help of others or to make a great effort to move, which causes inconvenience and restricts their mobility in daily life. Summary of the Invention

[0008] To address the problems described above, the present invention aims to provide a wheel for climbing stairs. When the wheel encounters an obstacle during its movement, the outer circumferential wheel stops rotating, while the inner circumferential wheel rotates under the driving force of a motor. When the motor shaft rises above the obstacle, the tension of the spring comes into play to pull the wheel, thereby enabling easy climbing over the obstacle.

[0009] To achieve the above objectives, the climbing stair wheel according to the features of the present invention comprises: The outer circumference wheel moves in contact with the ground; and An inner peripheral wheel is connected to the inner side of the outer peripheral wheel in a non-detachable manner. A motor for providing driving force to rotate the wheel is connected below the inner peripheral wheel. When an obstacle is encountered, the rotation of the outer peripheral wheel stops, and the rotation axis of the motor moves onto the obstacle. When moving on flat ground, the outer peripheral wheel rotates due to the rotational force of the motor, while the inner peripheral wheel remains fixed. When encountering an obstacle, the outer peripheral wheel remains fixed, and the inner peripheral wheel rotates together with the motor's rotational axis as the motor moves above the obstacle.

[0010] The present invention includes a spring member connected to one side of an inner circumferential wheel and a motor, for maintaining the inner circumferential wheel and the outer circumferential wheel at a predetermined angle when moving on flat ground, and when encountering an obstacle, the rotation of the outer circumferential wheel stops, and the inner circumferential wheel rotates. When the rotation shaft of the motor rises above the obstacle, tension is applied to pull the inner circumferential wheel.

[0011] Invention Effects Based on the above structure, by applying the present invention to the wheels of mobility tools such as wheelchairs, strollers, and trolleys, it has the effect of providing the convenience of easily climbing obstacles such as steps and stairs. Attached Figure Description

[0012] Figure 1 This is a diagram illustrating the structure of a wheel for climbing stairs according to an embodiment of the present invention.

[0013] Figure 2 and Figure 3 This is an exploded perspective view of the wheels of a climbing staircase according to an embodiment of the present invention.

[0014] Figures 4 to 10 This is a diagram showing the exploded view, cross-section, and partial structure of a wheel for climbing stairs according to an embodiment of the present invention.

[0015] Figures 11 to 17 This is a diagram illustrating the operational state of the wheels of a climbing staircase according to an embodiment of the present invention.

[0016] In the picture: 100: Wheel, 110: Inner circumferential wheel, 120: Outer circumferential wheel, 130: Frame, 140: Motor component, 150: Spring component. Detailed Implementation

[0017] Throughout the specification, when a component “includes” a certain element, unless otherwise specifically stated to the contrary, that component may further include other elements without excluding them.

[0018] Figure 1 This is a diagram illustrating the structure of a wheel for climbing stairs according to an embodiment of the present invention. Figure 2 and Figure 3 This is an exploded perspective view of a wheel for climbing stairs according to an embodiment of the present invention. Figures 4 to 10This is a diagram showing the exploded view, cross-section, and partial structure of a wheel for climbing stairs according to an embodiment of the present invention.

[0019] The climbing step wheel 100 according to an embodiment of the present invention includes: an inner peripheral wheel 110, an outer peripheral wheel 120, a motor member 140 fixed to a frame 130 to rotate the inner peripheral wheel 110, and a spring member 150 formed between the inner peripheral wheel 110 and the frame 130.

[0020] The climbing wheel 100 includes: an outer peripheral wheel 120 and an inner peripheral wheel 110 connected to the inner side of the outer peripheral wheel 120 to prevent detachment and rotating along the inner circular surface of the outer peripheral wheel 120.

[0021] The inner circumferential ring 110 is a circular ring and is made of a hollow body made of materials such as stainless steel or high-strength aluminum alloy, but it is not limited to these. It can be made of a metal material with excellent physical and mechanical properties such as durability and strength. The cross-sectional shape of the hollow body is also a general circle.

[0022] The outer ring 120 is a circular ring and is made of materials such as plastic, rubber, and synthetic resin. However, it is not limited to these materials and can be made of synthetic resin material with excellent physical and mechanical properties such as durability and strength. The cross-sectional shape of the hollow body is also a general circle.

[0023] The outer circumferential wheel 120 is in contact with the ground and can move freely.

[0024] The outer peripheral wheel 120 includes: an annular first wheel body 121 with a first hollow portion 121a formed on its inner side; and at least one rotating groove 122 formed at predetermined intervals along one side of the inner peripheral surface of the first wheel body 121.

[0025] The inner circumferential wheel 110 has an annular first inner circumferential wheel 111 and a second inner circumferential wheel 112 with second hollow portions 111a and 112a formed on the inner side. The two circular first inner circumferential wheels 111 and the second inner circumferential wheel 112 are combined with each other to form a circular wheel structure.

[0026] The first inner circumferential wheel 111 and the second inner circumferential wheel 112 are inserted into one or more rotating slots 122 and rotate.

[0027] The first inner circumferential wheel 111 is annular, with a first hollow portion 111a formed in the center, a first through-hole 111b through which the lower center portion is penetrated, and a plurality of first connecting rods 111c protruding along the circumferential surface of the first inner circumferential wheel 111.

[0028] A first upper bearing 111d and a second upper bearing 111e are inserted into the first connecting rod 111c formed on the upper part of the first inner circumferential wheel 111, and a lower bearing 174 is inserted into the first connecting rod 111c formed on the lower end of the first inner circumferential wheel 111.

[0029] The second inner circumferential wheel 112 is annular, with a second hollow portion 112a formed in the center, a second through-hole 112b through which the lower center portion is penetrated, and a plurality of second connecting rods 112c protruding along the circumferential surface of the second inner circumferential wheel 112.

[0030] The first inner circumferential wheel 111 inserts the first connecting rod 111c into the second connecting rod groove 112d of the second inner circumferential wheel 112, and the second inner circumferential wheel 112 inserts the second connecting rod 112c into the first connecting rod groove 111f. Thus, the first inner circumferential wheel 111 and the second inner circumferential wheel 112 are coupled in the two rotating grooves 122 of the outer circumferential wheel 120, and rotate along the inner circumferential surface of the outer circumferential wheel 120.

[0031] The circular gear body 123 in the outer peripheral wheel 120 is formed on the edge of the inner peripheral surface of the first wheel body 121 and is inserted and connected along the inner peripheral surface.

[0032] A circular gear body 123 has a gear body 124 and a gear groove 125 continuously arranged on its inner side. The gear body 124 is configured as a ring to form a third hollow portion 126. The gear groove 125 is formed along the inner circumferential surface of the gear body 124.

[0033] The frame 130 stands vertically, forming a hollow rod-shaped frame body 131, and a motor connector 132 is connected to the lower end of the frame body 131.

[0034] The motor component 140 includes: a motor 141 that provides rotational driving force, a circular block 142 protruding to one end of the motor 141, and a rotating shaft 143 having a predetermined length, the rotating shaft rotating by transmitting the rotational driving force of the motor 141 to the inside of the circular block 142.

[0035] The motor connector 132 forms an internal space that is empty, and the motor 141 is inserted into the internal space. The circular block 142 and the rotating shaft 143 protrude outward from the motor connector 132.

[0036] The spring member 150 includes: a helical spring 151 wound to restore a predetermined elasticity and have a force to resist compression; and a spring pin 152 extending upward from one end of the helical spring 151. In this invention, a helical spring 151 is illustrated, but the invention is not limited thereto, and may include various springs such as elastic springs and compression springs.

[0037] When a left or right force is applied to the spring pin 152, the spring member 150 generates a tension that resists the force applied by the helical spring 151 in the opposite direction.

[0038] The spring member 150 is connected to one side of the inner peripheral wheel 110 and the motor 141. When moving on flat ground, the inner peripheral wheel 110 and the outer peripheral wheel 120 are held together at a predetermined angle. When the outer peripheral wheel 120 stops rotating when it encounters an obstacle, the inner peripheral wheel 110 rotates. When the rotation shaft 143 of the motor 141 rises to the top of the obstacle, the tension comes into play to pull the inner peripheral wheel 110.

[0039] A circular block 142 is inserted into a helical spring 151 in a circumferential manner, and a spring pin 152 is vertically erected on the upper part of the circular block 142.

[0040] The first inner circumferential wheel 111 has a cover portion 113 with a gently curved surface formed from the apex on the lower end side opposite to the circumferential surface on which the first connecting rod 111c is formed, and a protrusion 114 of a predetermined length is formed at the apex of the cover portion 113 in the direction toward the connecting frame 130.

[0041] The cover 113 is mountain-shaped, with a protrusion in the middle and a height that decreases towards both sides.

[0042] The protrusion 114 extends a predetermined length from the apex of the cover 113 to form a rod shape.

[0043] A connecting hole 115 is formed on one side of the protrusion 114 for inserting a spring pin 152 that is vertically erected from the coil spring 151. The spring pin 152 is inserted and coupled vertically upward into the connecting hole 115.

[0044] The gear assembly 160 includes: a coupling interface 162 having an insertion slot 161 for inserting and connecting a rotating shaft 143 of a motor 141; a drive gear 163 connected to the coupling interface 162 and having a diameter greater than that of the coupling interface 162; and a connecting rod 164 having a predetermined length and extending elongated in the length direction along which the drive gear 163 connects with the opposite face of the coupling interface 162.

[0045] The drive gear 163 is formed as a ring, with a gear formed along its outer circumference, and part of the gear meshes and rotates with the gear groove 125 of the gear body 124.

[0046] A portion of the drive gear 163 contacts and rotates with the lower surface of the cover 113, while another portion of the gear meshes and rotates along the gear groove 125.

[0047] The connecting rod 164 is formed in a rod shape for a predetermined length. The first bearing 170, the first washer 171, the second bearing 172, the second washer 173, the third bearing 174, the fourth bearing 175, and the third washer 176 are inserted and connected in sequence in the horizontal direction.

[0048] The connecting rod 164 passes through the first through-hole 111b of the first inner circumferential wheel 111 and is sequentially inserted into the first bearing 170, the first washer 171, the second bearing 172, the second washer 173, and the third bearing 174 and connected. It also passes through the second through-hole 112b of the second inner circumferential wheel 112 and is inserted into the fourth bearing 175 and the third washer 176 and connected.

[0049] When the driving force of the motor 141 is transmitted to the rotating shaft 143, the drive gear 163 of the gear assembly 160 inserted into the rotating shaft 143 rotates along the gear groove 125 of the circular gear body 123. Consequently, the connecting rod 164 of the gear assembly 160 causes the first inner circumferential gear 111 and the second inner circumferential gear 112 to rotate. This is because the connecting rod 164 passes through the first through-hole 111b of the first inner circumferential gear 111 and the second through-hole 112b of the second inner circumferential gear 112, thus connecting the first inner circumferential gear 111 and the second inner circumferential gear 112.

[0050] The inner peripheral wheel 110 is connected to the inner side of the outer peripheral wheel 120 to prevent disengagement. A motor 141 is connected below the inner peripheral wheel to provide driving force for rotating the wheel. When an obstacle is encountered, the rotation of the outer peripheral wheel 120 stops, and the rotation shaft 143 of the motor 141 moves onto the obstacle.

[0051] When moving on flat ground, the outer peripheral wheel 120 rotates by the rotational force of the motor 141, and the inner peripheral wheel 110 is fixed by its own weight to the connecting rod 164, which serves as a support shaft. When encountering an obstacle, the outer peripheral wheel 120 is fixed, and the inner peripheral wheel 110 rotates together with the motor 141 through the rotational shaft 143 when the inner peripheral wheel moves above the obstacle.

[0052] Figures 11 to 17 This is a diagram illustrating the operational state of the wheels of a climbing staircase according to an embodiment of the present invention.

[0053] When wheel 100 comes into contact with an obstacle during operation ( Figure 11 The outer circumferential wheel 120 stops rotating, and driven by the motor 141, the rotating shaft 143 of the motor 141 rises to the top of the obstacle. Figure 12 ).

[0054] When the rotating shaft 143 of the motor 141 rises to the top of the obstacle, the wheel 100 pulls the inner circumferential wheel 110 by the tension of the spring member 150. Figure 13 ).

[0055] Wheel 100 continues to be driven by motor 141 and descends under the tension of spring member 150 and gravity. Figure 14 and Figure 15Next, as the inner circumferential wheel 110 rotates, driven by the motor 141, the tension of the spring member 150 keeps the inner circumferential wheel 110 and the outer circumferential wheel 120 at a predetermined angle, and moves on flat ground. Figure 16 , Figure 17 ).

[0056] The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art using the basic concepts of the present invention as defined in the claims also fall within the scope of the present invention.

Claims

1. A wheel for climbing stairs, wherein, include: The outer circumference wheel moves in contact with the ground; The inner peripheral wheel is connected to the inner side of the outer peripheral wheel in a non-disengaging manner. The drive gear of the rotating shaft, which is formed to transmit the rotational force of the motor, meshes with the gear body of the outer peripheral wheel and rotates. When an obstacle is encountered, the rotation of the outer peripheral wheel stops, and the rotating shaft of the motor moves to the obstacle. A spring component includes: a motor component, a motor connector that fixes the motor to the lower end of a frame, and uses the shaft of the inner peripheral wheel as a rotation axis to transmit driving force to the outer peripheral wheel; The spring component includes a spring connected to the motor coupling, one end of which is connected to one side of the inner circumferential wheel. During movement on flat ground, the inner and outer circumferential wheels maintain a predetermined angle. When encountering an obstacle, the outer circumferential wheel stops rotating, and the inner circumferential wheel rotates while the rotation axis rises above the obstacle. At this point, tension is applied to pull the inner circumferential wheel. During movement on flat ground, the outer peripheral wheel rotates due to the rotational force of the motor, while the inner peripheral wheel is fixed. When encountering an obstacle, the outer peripheral wheel is fixed, and the inner peripheral wheel rotates together with the motor's rotational axis as the motor moves above the obstacle.

2. The wheel for climbing stairs according to claim 1, wherein, The outer peripheral wheel is connected to the gear body, and the gear body has gear grooves continuously arranged along its inner peripheral surface. The inner circumferential wheel serves to transmit the power of the motor to the rotation shaft of the outer circumferential wheel, and the spring is connected between one side of the inner circumferential wheel and the motor coupling body.

3. The wheel for climbing stairs according to claim 1, wherein, It also includes a gear assembly comprising: a coupling interface having an insertion slot for inserting and engaging a rotating shaft for transmitting power from the motor; a drive gear, engaging the coupling interface and being larger than the diameter of the coupling interface; and a connecting rod having a predetermined length, engaging the drive gear, and extending elongated in the longitudinal direction. The connecting rod is rod-shaped and formed to a predetermined length, and is inserted into and connected to the shaft on one side of the lower end of the inner circumferential wheel. The rotating shaft of the motor and the shaft on the lower end of the inner circumferential wheel are located on the same horizontal line. When the rotating shaft of the motor rotates, the drive gear rotates with the shaft on the lower end of the inner circumferential wheel as a reference and transmits power to the circular gear body that meshes with the drive gear.

4. The wheel for climbing stairs according to claim 1, wherein, The outer peripheral wheel is integrally connected to the gear body; therefore, it can be manufactured separately or as a single piece. The rotating shaft is connected to the motor and causes the drive gear to rotate.

5. The wheel for climbing stairs according to claim 1, wherein, The power transmission between the drive gear and the gear body is a power transmission structure that utilizes gears and friction, and the spring is helical in shape.

6. A wheel for climbing stairs, wherein, include: The outer circumference wheel moves in contact with the ground; as well as An inner peripheral wheel is connected to the inner side of the outer peripheral wheel in a non-detachable manner. A motor that provides driving force for rotating the wheel is connected to the bottom of the inner peripheral wheel. When an obstacle is encountered, the rotation of the outer peripheral wheel stops, and the rotation shaft of the motor moves to the obstacle. When moving on flat ground, the outer circumferential wheel rotates due to the rotational force of the motor, while the inner circumferential wheel remains fixed. When encountering an obstacle, the outer circumferential wheel remains fixed, and the inner circumferential wheel rotates together with the motor's rotational axis as the motor moves above the obstacle. The device includes a spring component connected to one side of the inner circumferential wheel and the motor. When moving on flat ground, it maintains a predetermined angle between the inner and outer circumferential wheels. When encountering an obstacle, and the outer circumferential wheel stops rotating, the inner circumferential wheel rotates. As the motor's rotation shaft rises above the obstacle, tension is applied to pull the inner circumferential wheel. The outer peripheral wheel includes: an annular first wheel body, with a first hollow portion formed on the inner side; And at least one rotating groove, formed at predetermined intervals along one side of the inner circumferential surface of the first wheel body. The inner circumferential wheels are formed by an annular first inner circumferential wheel and a second inner circumferential wheel that have a second hollow portion on their inner sides. The first inner circumferential wheel and the second inner circumferential wheel are inserted into the one or more rotating slots and rotate. The outer peripheral wheel is formed on one side of the inner peripheral surface of the first wheel body. A circular gear body is inserted and connected along the inner peripheral surface. The circular gear bodies are continuously arranged to form a gear body and a gear groove. The gear body is formed as an annular ring with a third hollow part on the inner side. The gear groove is formed along the inner peripheral surface of the gear body.

7. The wheel for climbing stairs according to claim 6, wherein, It also includes a motor component, which comprises: a circular block protruding from one end of the motor; and a rotating shaft having a predetermined length, which receives the rotational driving force of the motor and rotates towards the inside of the circular block. The spring component further includes: a spring, and a spring pin extending upward from one end of the spring. The spring member is inserted into the spring to surround the periphery of the circular block, and the spring pin is vertically erected on the upper part of the circular block.

8. The wheel for climbing stairs according to claim 7, wherein, The first inner circumferential wheel has a cover on its lower end side. The cover protrudes outward, forms a gentle curve at the apex, and has a shape where the height of both sides decreases. A rod-shaped protrusion extends a predetermined length from the apex of the cover. The spring pin is inserted and coupled vertically upward through the connecting hole of the protrusion.

9. The wheel for climbing stairs according to claim 6, wherein, It also includes a gear assembly, which includes: a coupling interface having an insertion slot for inserting and connecting the rotating shaft of the motor; a drive gear connected to the coupling interface and having a diameter larger than that of the coupling interface; and a connecting rod having a predetermined length, connected to the drive gear, and extending elongated in the longitudinal direction, wherein the gear of the drive gear is inserted into the gear slot of the circular gear body and meshes and rotates.

10. The wheel for climbing stairs according to claim 9, wherein, The first inner circumferential wheel forms a first through-hole at its lower center, and the second inner circumferential wheel forms a second through-hole at its lower center. The connecting rod passes through the first through-hole of the first inner circumferential wheel, and is sequentially inserted into and connected to the first bearing, the second bearing, and the third bearing. It then passes through the second through-hole of the second inner circumferential wheel, and is inserted into and connected to the fourth bearing.

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