KR20220141155A - Roller typed wheel - Google Patents

Abstract

Disclosed in the present invention is a roller type wheel. More specifically, the roller type wheel comprises: a circular core; a tire coupled to the rim of the core; and an elastic ring made of an elastic material buried inside along the circumference of the tire. The core includes: a first core frame made of a metallic material and including a first supporting part having the shape of a circular pipe and having a female thread formed on an inner circumferential surface, a first pressurizing part extending outwardly from one end of the first supporting part and bent inwardly to be able to be inserted into a first coupling groove formed along one side circumference of the tire, and an insert part extending inwardly from one end of the first supporting part; a second core frame made of a metallic material and including a second supporting part having the shape of a circular pipe and having a male thread formed on an outer circumferential surface, a second pressurizing part extending outwardly from one end of the second supporting part and bent inwardly to be able to be inserted into a second coupling groove formed along the other side circumference of the tire, and a second cover part having the shape of a circular plate with a shaft hole formed at the center and sealing one end of the second supporting part; and a hub made of resin and consisting of a bearing supporting part having the shape of a circular pipe and having one end inserted and combined in the shaft hole, and a first cover part having the shape of a circular plate and coupled to the other end of the bearing supporting part, wherein the first cover part is insert-injected into the insert part to be combined. Therefore, provided is a roller type wheel having a structure enabling an abraded tire alone to be replaced.

Description

Roller typed wheel

The present invention relates to a wheel, and more particularly, to a roller ski, a quick board, an inline skate, and a roller-type wheel attached to the bottom of a carrier.

In Nordic countries such as Norway, the Netherlands, and Switzerland, skiing is usually enjoyed in winter. However, in summer, there is no snow, so snow skiing is not possible, so roller skiing enjoys leisure sports.

Roller skis were developed by attaching wheels to a ski plate, and the wheels are very similar to roller-type wheels attached to quickboards or inline skates.

A conventional conventional roller-type wheel consists of a core, an air tube surrounding the rim of the core, and a rubber tire.

At this time, the core, the air tube, and the rubber tire may have a structure that can be separated from each other, but there is a disadvantage that a basic air inlet is required and it is difficult to make a small wheel. And it is impossible to make wheels that require precision within 0.2mm, such as concentricity and wobbling.

Instead, most structures for manufacturing small wheels consist of a core and a tire integrated.

In the case of an integral type, the core may be deformed due to the high temperature and high pressure generated in the process of manufacturing a rubber tire using an injection core. Therefore, it is common to fabricate a precision core using an aluminum wheel.

However, even in this case, there are two problems.

First, it is impossible to reuse the core because the core must also be disposed of when the tire wears out.

Second, there is a problem that bearing replacement is not easy. In other words, since the entire core is an integrated structure made of metal, the hub part supporting the bearing does not stretch or spread, so there is no vertical force or sufficient force to remove the bearing in the axial direction, so separating the bearing from the bearing shoulder very difficult

Republic of Korea Public Utility Model 20-2010-0009539 (2010.9.29.) "Roller Ski Set" Republic of Korea Patent Registration 10-0672043 (Jan. 15, 2007) "Roller Ski" Republic of Korea Registered Utility Model 20-0360598(2004.8.21.) "Wheel of Inline Skate" Republic of Korea Registered Utility Model 20-0384509(2005.5.9.) "Wheel for inline skates"

Accordingly, the present invention has been developed to solve the problems of the prior art, and an object of the present invention is to provide a roller-type wheel having a structure in which only worn tires can be replaced.

Another object of the present invention is to provide a roller-type wheel having a structure in which a bearing can be easily detached when replacing a tire.

Another object of the present invention is to provide a roller-type wheel having a structure in which an elastic ring of an elastic material is inserted instead of an air tube inside a tire.

A roller-type wheel according to the present invention for achieving the above object is a roller comprising a circular core, a tire coupled to the rim of the core, and an elastic ring of an elastic material embedded therein along the circumference of the tire In the mold wheel, the core includes a first support part having a circular tube shape having a female thread formed on an inner circumferential surface, and a first binding formed along the circumference of one side of the tire by extending outwardly from one end of the first support part and bending inward. a first core frame made of a metal material including a first pressing part that can be inserted into the groove, and an insert part extending inwardly from one end of the first support part; A second support part having a circular tube shape having an external thread formed on an outer circumferential surface, and extending outwardly from one end of the second support part, bent inward, and insertable into a second fastening groove formed along the circumference of the other side of the tire a second core frame made of a metal material including a pressing part and a second cover part having a circular plate shape having a shaft hole formed in the center and sealing one end of the second support part; A resin having a circular tube shape and a bearing support part having one end fitted to the shaft hole and a first cover part having a circular plate shape coupled to the other end of the bearing support part, wherein the first cover part is insert-injected into the insert part. It may consist of a hub of material.

Here, at both ends of the bearing support part, a bearing shoulder having a binary shape may be formed so that a bearing can be seated, respectively.

In addition, it is preferable that at least one jig hole is formed in the first cover part and the second cover part so as to be fixed to the jig for fastening or separating the first core frame and the second core frame.

In addition, the elastic ring may be fitted into a ring groove formed along the inner circumferential circumference of the tire, and may be made of a polyurethane material.

On the other hand, the cross section of the ring groove forms a 'U' shape, and the cross section of the elastic ring may be formed in a bulb shape in which a circular head part and a rectangular tanji part having a width smaller than the diameter of the head part are overlapped.

According to the present invention described above, there are the following effects.

First, since the first core frame and the second core frame are screwed together, there is an advantage that only worn tires can be replaced by separating them from each other.

Second, since the elastic ring is embedded in the tire, it is possible to elastically support the tire, improving riding comfort and riding comfort, and maintaining the shape of the tire.

Third, since the hub is insert-injected with a resin material in the insert part, it is very easy to attach and detach the bearing, so it is easy to replace the bearing.

1 is a cross-sectional perspective view showing the structure of a roller-type wheel according to an embodiment of the present invention;
Figure 2 is a cross-sectional perspective view showing the core of the present invention shown in Figure 1;
3 is a perspective view showing the first core frame of the present invention shown in FIG.
Figure 4 is a perspective view showing the hub of the present invention shown in Figure 2;
5 is a cross-sectional perspective view showing the tire of the present invention shown in FIG.
6 is a state diagram of the present invention

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. And in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

1 is a cross-sectional perspective view showing a roller-type wheel structure according to an embodiment of the present invention.

The present invention is rotatably attached to the lower surface of the ski plate of the roller ski or the lower surface of the quick board, or is rotatably coupled to the lower part of the shoe of the inline skate, and as shown in the figure, a wheel-shaped core 100 and, It may be configured to include a tire 200 coupled to the rim of the core 100 and an elastic ring 300 embedded in the tire 200 .

First, the core 100 will be described with reference to FIGS. 2 to 4 together. 2 is a cross-sectional perspective view showing the core of the present invention shown in FIG. 1, FIG. 3 is a perspective view showing the first core frame of the present invention shown in FIG. 2, and FIG. 4 is the hub of the present invention shown in FIG. is a perspective view showing

The core includes a first core frame 110 , a second core frame 120 screwed to the first core frame 110 , and a hub 130 coupled to the first core frame 110 by insert injection molding. It may be composed of

The first core frame 110 includes a first support part 111 having a circular tube shape, a first pressing part 112 extending outwardly along one edge of one end of the first support part 111 , and the first The insert part 113 may be formed to extend inwardly along one edge of the support part 111 .

At this time, a female thread 111a is formed on the inner circumferential surface of the first support part 111 , and the outer circumferential surface is in contact with the tire and the elastic ring 300 .

In addition, the end of the first pressing part 112 is formed with a binding jaw 112a bent inward, and the binding jaw 112a is a binding groove 210 formed along the circumference of one side of the tire 200 to be described later. ) while being inserted into the tire 200 may be pressurized.

In addition, the insert part 113 is for insert injection of a hub 130 to be described later, and has a structure in which a hollow hole 113a is formed in the center, and a plurality of fusion holes 113b are formed radially.

The fusion hole 113b is a passage through which the injection resin passes and can be fused to both surfaces of the insert part 113 .

The second core frame 120 has the same outer diameter as the first core frame 110 and is screwed to each other. It may be composed of a second pressing part 122 extending outwardly along the edge of one end, and a second cover part 123 having a circular plate shape that seals one end of the second support part 121 .

At this time, a male screw thread 121a is formed on the outer circumferential surface of the second support part 121 , and the second support part 121 may be introduced into the first support part 111 to be screwed together.

In addition, the end of the second pressing part 122 is also formed with a binding jaw 122a bent inward to press it while being inserted into the binding groove 210 formed along the circumference of the other side of the tire 200 .

In addition, the second cover part 123 is formed in a circular plate shape, and a shaft hole 123a into which the bearing support part 131 of the hub 130 to be described later is fitted is formed in the center thereof.

For reference, the first core frame 110 and the second core frame 120 may be made of a metal material having high rigidity and light weight, and preferably duralumin may be used.

The hub 130 rotatably supports a rotating shaft (not shown) of a wheel while being fixed to the first core frame 110 .

Specifically, the hub 130 includes a circular tube-shaped bearing support part 131 and a first cover part 132 extending from the outer peripheral surface of the other end of the bearing support part 131 .

Here, one end of the bearing support 131 may be fitted and coupled to the shaft hole 123a. That is, since the inner diameter of the shaft hole 123a and the outer diameter of the bearing support part 131 are the same, they may be force-fitted or removed for separation.

Alternatively, of course, one end of the bearing support 131 and the shaft hole 123a may be coupled in such a way that they are screwed together.

Bearing shoulders 131a are formed on both ends of the inner peripheral surface of the bearing support 131 so that the ring-shaped bearings B can be press-fitted. The bearing shoulder 131a is formed to be larger than the inner diameter of the bearing support 131 and has a stepped shape.

And the first cover part 132 is made of a circular plate shape and is fused and coupled to the insert part 113 by insert injection.

In other words, the insert part 113 is coupled to be embedded into the first cover part 132 so that the first cover part 132 is fused to both sides of the insert part 113 .

In this case, when the molten resin is injected into the insert part 113 , the resin may be fused to both surfaces of the insert part 113 through the fusion hole 113b.

As described above, since the hub 130 is made of a resin material, the bearing B can be easily mounted on the bearing support 131 and the bearing B can be easily detached for replacement.

This is because, since it is made of a resin material, the inner diameter of the bearing shoulder 131a may be slightly expanded by the elasticity because the elasticity is relatively greater than that of the metal. Since the conventional hub 130 made of a metal material has little elasticity, it is impossible to expand, so various tools or equipment are needed to detach the mounted bearing B.

However, there is an advantage that can be easily removed by moving the bearing (B) mounted in the present invention left and right.

Additionally, the first cover part 132 and the second cover part 123 may be fixed to a jig (not shown) in order to fasten or separate the first core frame 110 and the second core frame 120 . It is preferable that at least one jig hole (132a, 123b) is formed so that the

That is, the jig is provided to the jig hole so as to apply a torque to rotate opposite to each other to screw the female thread 111a of the first core frame 110 and the male thread 121a of the second core frame 120 . I can insert and fix tools. Since these jigs and tools may be of various shapes and are known, detailed descriptions thereof will be omitted.

For reference, a reinforcing member 133 of a right angle is further coupled between the bearing support part 131 and the first cover part 132 to firmly support the bearing support part 131 .

Next, the tire and the elastic ring will be described with reference to FIG. 5 together. 5 is a cross-sectional perspective view showing the tire of the present invention shown in FIG.

The tire 200 is made of a rubber material and has a ring shape and is coupled to the rim of the core 100 .

A ring groove 220 is formed inside the tire 200 so that the elastic ring 300 can be inserted and buried. The ring groove 220 has a 'U' shape in cross section and is opened inwardly.

In addition, the aforementioned fastening grooves 210 are continuously concavely formed along the circumference of both sides of the tire 200 .

The elastic ring 300 is a ring-shaped O-ring made of an elastic material, and is inserted and accommodated in the ring groove 220 .

The elastic ring 300 is made of a material greater than the elasticity of the tire 200 and functions like a conventional air tube. That is, the tire 200 elastically supports the load to improve the riding comfort of the roller ski.

Here, the cross-section of the elastic ring 300 may have a bulb shape as shown.

In other words, the elastic ring 300 may have a shape in which a circular head portion 310 accommodated in the ring groove 220 and a rectangular elastic support portion 320 for elastically supporting the tire 200 are overlapped. . At this time, since the width of the tanji portion 320 is formed smaller than the diameter of the head portion 310 , the cross section of the elastic ring 300 is approximately similar to a bulb shape.

Since it has this structure, when the elastic ring 300 is inserted into the ring groove 220 , the head part 310 is inserted into the ring groove 220 forcibly, but between the elastic ring 300 and the ring groove 220 . may cause gaps.

However, when the first core frame 110 and the second core frame 120 are fastened, the locking jaws 112a of the first pressing part 112 and the locking jaws 112a of the second pressing part 122 are separated. When both sides of the tire 200 are strongly pressurized while being inserted into the binding groove 210 , the compressed tire 200 is pushed toward the tanji part 320 and comes into close contact with the tire 200 , and the clearance disappears.

Then, the compressed tire 200 is pushed outward and the rim of the tire 200 becomes convex, so that the cross-section changes from a semi-circular to a semi-elliptical shape.

Accordingly, the tire is compressed when a load is applied, but is elastically supported by the elastic ring 300 , so that riding comfort is improved. And since the elastic ring 300 fills the ring groove 220 , the tire 200 is not completely crushed or deformed. Not only that, it can also reduce the actual weight of the tire.

For reference, the material of the elastic ring 300 may be high elasticity and light polyurethane.

Hereinafter, a process of replacing a tire in the present invention will be briefly described with reference to FIG. 6 together. 6 is a diagram showing a state of use of the present invention.

In the present invention, even if the tire 200 is worn, only the tire can be replaced.

First, the bearing B is detached from the bearing shoulder 131a. To this end, the bearing (B) can be pulled out by holding it with a tool and moving it left and right or zigzag. Since the bearing support part 131 is made of a resin material and has elasticity, the bearing support part 131 is slightly opened and the bearing B can be easily removed.

Then, when the jig hole 132a of the first core frame 110 and the jig hole 123b of the second core frame 120 are respectively clamped and turned in the opposite direction, the female threaded thread 111a and the male threaded thread 121a) As this is unwound, the tire 200 and the core 100 are separated.

The elastic ring 300 may be removed from the separated tire 200 and mounted on a new tire.

The first core frame 110 and the second core frame 120 are fastened to both sides of the new tire 200 while facing each other. At this time, the fastening jaws 112a and 122a are respectively inserted into the fastening grooves 210 of the tire 200, and the female screw thread 111a and the male screw thread 121a are screwed together.

When fully tightened, the locking jaws 112a and 122a respectively dig into the locking grooves 210 and press both sides of the tire 200, so that the tire is compressed while the inner side is in close contact with the first support unit 111 and the outer side. expands into a semi-elliptical shape.

In addition, since the elastic ring 300 can elastically support the external force applied to the tire 200 , the riding comfort of the occupant or the feeling of close contact with the ground is improved.

Although a representative embodiment of the present invention has been described above with reference to the drawings, those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above content. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims described below as well as the claims and equivalents.

100: core
110: first core frame 111: first support part
111a: female thread 112: first pressing part
112a: binding jaw 113: insert part
113a: hollow hole 113b: fusion hole
120: second core frame 121: second support part
121a: male thread 122: second pressing part
122a: binding jaw 123: second cover part
123a: shaft hole 123b: jig hole
130: hub 131: bearing support
131a: bearing shoulder 132: first cover part
132a: jig hole 133: reinforcing member
200: tire
210: fastening groove 220: ring groove
300: elastic ring
310: head 320: tanji part
B: Bearing

Claims (5)

In the roller-type wheel comprising a circular core, a tire coupled to the rim of the core, and an elastic ring of an elastic material embedded therein along the circumference of the tire,
The core is
A first support part having a circular tube shape having a female thread formed on an inner circumferential surface thereof, and extending outwardly from one end of the first support part and bent inward to be inserted into a first fastening groove formed along a circumference of one side of the tire. a first core frame made of a metal material and extending inwardly from one end of the first support part and including an insert part;
A second support part having a circular tube shape having an external thread formed on an outer circumferential surface, and extending outwardly from one end of the second support part, bent inward, and insertable into a second fastening groove formed along the circumference of the other side of the tire a second core frame made of a metal material including a pressing part and a second cover part having a circular plate shape having a shaft hole formed in the center and sealing one end of the second support part;
A resin having a circular tube shape and a bearing support part having one end fitted into the shaft hole and a first cover part having a circular plate shape coupled to the other end of the bearing support part, wherein the first cover part is inserted into the insert part and coupled A roller-type wheel, characterized in that it consists of a hub of material. The method of claim 1,
A roller-type wheel, characterized in that at both ends of the bearing support part, bearing shoulders of a binary shape are formed so that the bearings can be seated, respectively. The method of claim 1,
One or more jig holes are formed in the first cover part and the second cover part to be fixed to the jig for fastening or separating the first core frame and the second core frame. The method of claim 1,
The elastic ring may be fitted into a ring groove formed along the inner circumference of the tire, and is made of a polyurethane material. 5. The method of claim 4,
The cross section of the ring groove forms a 'U' shape, and the cross section of the elastic ring is a roller-type wheel, characterized in that the circular head part and the rectangular tanji part having a width smaller than the diameter of the head part are overlapped in a bulb shape.

Images