KR102625329B1 - A hubless wheel for bicycles having a stationary wheel devided into two parts - Google Patents

Abstract

This specification discloses a hubless wheel for a bicycle having a fixed wheel divided into two parts. The hubless wheel for a bicycle (100C) according to an embodiment of the present invention includes a fixed wheel 110 fixedly mounted on a bicycle body frame and a rotating wheel 120 rotatably disposed outside the fixed wheel 110. The fixed wheel 110 includes a left part (110L) and a right part (110R) that are detachably coupled.

Description

A hubless wheel for bicycles having a stationary wheel divided into two parts}

The present invention relates to a hubless wheel, and more specifically, to a hubless wheel for a bicycle having a fixed wheel divided into two parts.

A traditional wheel used in a bicycle has a hub located at the center of the wheel and a plurality of spokes.

In contrast, a hubless wheel is a type of wheel without a hub or spokes and has a structure that includes a fixed wheel fixed to the bicycle body and a rotating wheel disposed outside the wheel.

Unlike traditional wheels, which have an overall rotating structure, hubless wheels are composed of fixed parts such as fixed wheels and rotating parts such as rotating wheels.

Hubless wheels with this structure have the advantage of a clean and simple appearance because they do not have a hub or spokes.

However, most hubless wheels have the disadvantages of being heavier, louder, and less easy to assemble than traditional wheels.

The present invention is an invention derived to solve the problems of the prior art described above, and seeks to provide a hubless wheel for a bicycle with reduced weight and noise and improved assembly.

Accordingly, the present invention includes a fixed wheel 110 fixedly mounted on a bicycle body frame and a rotating wheel 120 rotatably disposed outside the fixed wheel 110, and the rotating wheel 120 is detachably coupled. We provide a hubless wheel for bicycles consisting of a left part (120L) and a right part (120R).

According to one embodiment, the hubless wheel for a bicycle further includes a bearing 130 disposed between the fixed wheel 110 and the rotating wheel 120, and the bearing 130 is connected to the bearing support 131. And it is composed of a plurality of bearing balls 132, and the bearing support body 131 may have a ring shape of one body and may have a plurality of ball receiving holes 131a formed through it.

According to one embodiment, the hubless wheel for a bicycle rotates at a rotation speed smaller than the rotation speed of the rotation wheel 120 when the rotation wheel 120 rotates because the bearing support 131 is not fixed. It may rotate along the wheel 120.

According to one embodiment, the hubless wheel for a bicycle has a pair of bearing ball contact surfaces 111 and 112 inclined in opposite directions formed on the outer peripheral surface of the fixed wheel 110, and the rotating wheel 120 A pair of bearing ball contact surfaces 125 and 126 inclined in opposite directions may be formed on the inner peripheral surface of .

According to one embodiment, the hubless wheel for a bicycle further includes a brake disk 140 detachably mounted on one side of the rotating wheel 120, and the brake disk 140 is connected to the rotating wheel 120. It may be arranged concentrically in the center.

According to one embodiment, the hubless wheel for a bicycle includes a small gear 170 that is rotationally driven by a motor or pedal and a large gear 180 that rotates in engagement with the small gear 170, and the large gear 180 ) may be detachably mounted on one side of the rotating wheel 120.

According to one embodiment, the hubless wheel for a bicycle may include a brake disc 190 mounted on the axle 171 to which the small gear 170 is coupled.

In addition, the present invention includes a fixed wheel 110 fixedly mounted on a bicycle body frame, a rotating wheel 120 rotatably disposed on the outside of the fixed wheel 110, and a rotating wheel 120 rotatable along the rotating wheel 120. A hubless wheel for a bicycle including a bearing 130 disposed between a fixed wheel 110 and the rotating wheel 120 is provided.

According to one embodiment, in the hubless wheel for a bicycle, the bearing 130 is composed of a bearing support body 131 and a plurality of bearing balls 132, and the bearing support body 131 is a one-body ring. It may have a shape with a plurality of ball receiving holes (131a) formed through it.

In addition, the present invention includes a fixed wheel 110 fixedly mounted on a bicycle body frame and a rotary wheel 120 rotatably disposed outside the fixed wheel 110, and the fixed wheel 110 is detachably coupled. Provides a hubless wheel (100C) for a bicycle with a fixed wheel divided into two parts, consisting of a left part (110L) and a right part (110R).

According to one embodiment, the hubless wheel for a bicycle (100C) having a fixed wheel divided into two parts further includes a bearing 130 disposed between the fixed wheel 110 and the rotating wheel 120, The bearing 130 may be composed of a bearing support body 131 and a plurality of bearing balls 132, and the bearing support body 131 may have a ring shape and may have a plurality of ball receiving holes 131a formed therethrough.

According to one embodiment, in the hubless wheel for a bicycle (100C) having a fixed wheel divided into two parts, the bearing support 131 is not fixed, so when the rotary wheel 120 rotates, the rotary wheel ( It may rotate along the rotary wheel 120 at a rotation speed smaller than the rotation speed of the rotary wheel 120.

According to one embodiment, the hubless wheel for a bicycle (100C) having a fixed wheel divided into two parts has a bearing ball contact groove 119 in the form of an arc formed on the outer peripheral surface of the fixed wheel 110. And an arc-shaped bearing ball contact groove 129 may be formed on the inner peripheral surface of the rotating wheel 120.

1 and 2 are diagrams showing the hubless wheel 100A of the first embodiment.
Figure 3 is an exploded view of the hubless wheel 100A.
Figure 4 is a cross-sectional view of the hubless wheel 100A.
Figure 5 is a diagram showing the fixed wheel 110 of the hubless wheel 100A.
6 and 7 are diagrams showing the rotating wheel 120 of the hubless wheel 100A.
Figure 8 is a diagram showing the bearing 130 provided in the hubless wheel 100A.
Figure 9 is a cross-sectional view for explaining the operation of the hubless wheel 100A.
Figure 10 is a diagram showing the assembly sequence of the hubless wheel (100A).
Figure 11 is a diagram showing the disassembly sequence of the hubless wheel (100A).
12 and 13 are views showing the hubless wheel 100B of the second embodiment.
Figure 14 is a cross-sectional view of the hubless wheel 100B.
15 to 17 are views showing the hubless wheel 100B with some parts removed.
Figure 18 is a diagram showing the process of separating the large gear 180 from the hubless wheel 100B.
FIG. 19 is a diagram showing the hubless wheel 100C of the third embodiment with some parts omitted.
Figure 20 is an exploded view of the hubless wheel 100C.
Figure 21 is a cross-sectional view of the hubless wheel 100C.
FIG. 22 is an exploded cross-sectional view of FIG. 21.
Figure 23 is a diagram showing the fixed wheel 110 of the hubless wheel 100C.

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

1. First embodiment of hubless wheel according to the present invention

FIGS. 1 and 2 are views showing the hubless wheel 100A of the first embodiment, FIG. 3 is an exploded view of the hubless wheel 100A, and FIG. 4 is a cross-sectional view of the hubless wheel 100A.

The hubless wheel 100A of the first embodiment shown in FIGS. 1 to 4 is a wheel used for a bicycle (not shown) and has a hubless structure. The hubless wheel 100A of the first embodiment can be suitably used for electric bicycles, and can be particularly suitably used as a front wheel for electric bicycles.

1 to 4, the hubless wheel 100A of the first embodiment includes a fixed wheel 110, a rotating wheel 120, a bearing 130, a brake disc 140, a tire 150, and a side cover. Includes (160).

The fixed wheel 110 is fixedly mounted on a bicycle body frame (not shown). The fixed wheel 110 does not rotate because it is fixed to the bicycle body frame.

The rotating wheel 120 is rotatably disposed outside the fixed wheel 110. While the fixed wheel 110 is composed of a single body, the rotating wheel 120 is composed of two parts. That is, the rotating wheel 120 consists of a left part (120L) and a right part (120R). The left part (120L) and the right part (120R) are joined by a number of bolts from the sides.

The fixed wheel 110 and the rotating wheel 120 are made of metal, preferably aluminum.

The bearing 130 is disposed between the fixed wheel 110 and the rotating wheel 120. The bearing 130 consists of a ring-shaped bearing support body 131 and a plurality of bearing balls 132. The bearing 130 serves to rotatably support the rotating wheel 120.

The brake disc 140 is mounted on one side of the rotating wheel 120. The brake disc 140 is in contact with a brake contact pad (not shown), and the contact pad is in close contact with the brake during operation. As a brake, a hydraulic brake can be suitably used. The brake disc 140 has a circular disc shape with an empty center and is arranged concentrically at the center of the rotating wheel 120. The brake disc 140 is bolted to the rotating wheel 120 and can be easily separated when necessary.

The tire 150 is fixedly mounted on the rotating wheel 120. The tire 150 is made of an elastic material, preferably rubber or plastic. As shown in FIG. 4, the tire 150 has a solid structure and does not require a separate tube. Referring to FIG. 4, a pair of engaging protrusions 151 and 152 are formed on the inner peripheral surface of the tire 150, and a pair of engaging protrusions 151 and 152 are formed on the outer peripheral surface of the rotating wheel 120. Coupling grooves 121 and 122 are formed.

The side cover 160 covers the hubless wheel 100A and is bolted to one side of the fixed wheel 110.

FIG. 5 is a diagram showing the fixed wheel 110 of the hubless wheel 100A, and FIGS. 6 and 7 are diagrams showing the rotating wheel 120 of the hubless wheel 100A.

Referring to FIG. 5, a pair of bearing ball contact surfaces 111 and 112 are formed on the outer peripheral surface of the fixed wheel 110. A pair of bearing ball contact surfaces 111 and 112 are inclined in opposite directions to form a V-shaped groove.

Referring to Figures 6 and 7, the rotating wheel 120 is composed of a left part (120L) and a right part (120R) that are bolted to each other as described above. A pair of bearing ball contact surfaces 125 and 126 are formed on the inner peripheral surface of the rotating wheel 120. A pair of bearing ball contact surfaces 125 and 126 are inclined in opposite directions to form an inverted V-shaped groove.

The bearing ball contact surfaces 111 and 112 of the fixed wheel 110 and the bearing ball contact surfaces 125 and 126 of the rotating wheel 120 are disposed opposite to each other. While the bicycle is running, the bearing ball 132 rotates while contacting the four bearing ball contact surfaces 111, 112, 126, and 127.

Figure 8 is a diagram showing the bearing 130 provided in the hubless wheel 100A.

Referring to this, as described above, the bearing 130 is composed of a ring-shaped bearing ball supporter 131 and a plurality of bearing balls 132. The bearing ball supporter 131 is provided with a plurality of ball receiving holes 131a. In the drawing, 16 bearing balls 132 are provided, but the number of bearing balls 132 can be changed in various ways. Since the bearing ball support body 131 is simply composed of a ring-shaped body (one body), it has the advantage of being very light in weight. In addition, since the bearing ball support 131 is not fixed to the hubless wheel 100A, no means is needed to fix the bearing ball support 131 to the hubless wheel 100A. Therefore, the structure of the bearing ball 132 is very simple.

Figure 9 is a cross-sectional view for explaining the operation of the hubless wheel 100A.

Referring to this, the rotating wheel 120 and the tire 150 attached thereto rotate while the bicycle is being driven. At this time, the fixed wheel 110 and the rotary wheel 120 bearing 130 are provided so that the rotating rotary wheel 120 is stably supported. At this time, the bearing ball 132 has a rotating movement while contacting the above-mentioned inclined bearing ball contact surfaces 111, 112, 125, and 126, so minimal noise is generated. At this time, since the bearing ball support 131 is not fixed, it rotates at a slower angular speed than the rotating wheel 120. Since this is a structure in which rotational movement of the bearing ball support body 131 occurs while the bicycle is being driven, the positions of the bearing balls 132 are changed according to the rotation of the bearing ball support body 131. When the position of the bearing ball 132 is fixed in one place, wear of the bearing ball contact surfaces 111 and 112 progresses rapidly because it is continuously in contact with the fixed wheel 110 at the fixed position. However, in the case of the present invention, the bearing ball contact surfaces 111 and 112 wear rapidly. Since the position of the ball 132 is variable, the wear rate of the bearing ball contact surfaces 111 and 112 can be delayed as much as possible.

Figure 10 is a diagram showing the assembly sequence of the hubless wheel (100A).

First, the bearing 130 and the right part 120R of the rotating wheel 120 are sequentially arranged outside the fixed wheel 110 (FIG. 10-a).

Next, insert the tire 150 into the right part 120R (FIG. 10-b).

Next, the left part 120L of the rotary wheel 120 is bolted and fastened to the right part 120R of the rotary wheel 120 (FIG. 10-c).

Finally, the brake disc 140 and the side cover 160 are fastened (FIG. 10-d).

In this way, the hubless wheel 100A of this embodiment is easily assembled. In particular, since the rotary wheel 120 is divided into two parts 120L and 120L, it is possible to place the bearing 130 of the above-described structure between the fixed wheel 110 and the rotary wheel 120, Mounting of the tire 150 can be easily performed.

Figure 11 is a diagram showing the disassembly sequence of the hubless wheel (100A).

First, the brake disc 140 is separated (FIG. 11-a).

Next, the left part (120L) of the rotating wheel 120 is separated (FIG. 11-b).

Next, the tire 150 is separated (FIG. 11-c).

Finally, after separating the side cover 160 and the right part (120R) of the rotating wheel 120, the bearing 130 is separated from the fixed wheel 110 (FIG. 11-d).

In this way, the hubless wheel 100A of this embodiment is easily disassembled. In particular, since the rotating wheel 120 is divided into two parts (120L, 120L), it is possible to easily separate the tire 150 after removing the left part (120L). Additionally, since no separate coupling means is applied to the bearing 130, it is possible to simply separate the bearing 130 from the fixed wheel 110 after removing the rotating wheel 120.

2. Second embodiment of hubless wheel according to the present invention

FIGS. 12 and 13 are views showing the hubless wheel 100B of the second embodiment, FIG. 14 is a cross-sectional view of the hubless wheel 100B, and FIGS. 15 to 17 show the hubless wheel 100B by removing some parts. This is a drawing showing ).

The hubless wheel 100B of the second embodiment shown in FIGS. 12 to 17 is a wheel used for a bicycle (not shown) and has a hubless structure. The hubless wheel 100B of the second embodiment can be suitably used for electric bicycles, and can be particularly suitably used as a rear wheel for electric bicycles.

Like the first embodiment described above, the hubless wheel 100B of the second embodiment includes a fixed wheel 110, a rotating wheel 120, a bearing 130, a tire 150, and side buckers 161 and 162. Includes.

Additionally, the hubless wheel 100B of the second embodiment includes a small gear 170 that rotates by being driven by a motor (not shown) or a pedal (not shown), and a large gear 180 that rotates in engagement with the small gear 170. And it also includes a brake disk 190 mounted on the shaft portion 171 to which the small gear 170 is coupled.

The large gear 180 has approximately the same diameter as the rotating wheel 120 and is attached to one side of the rotating wheel 120. More specifically, the large gear 180 is attached to the outer surface of the left part 120L of the rotating wheel 120 by bolting.

When the motor (not shown) or the pedal (not shown) is operated, the small gear 170 connected to it rotates and the large gear 180 engaged therewith rotates, thereby rotating the rotary wheel 120 on which the large gear 180 is mounted and the large gear 180 connected thereto. The mounted tire 150 is rotated.

The brake disc 190 is in contact with a brake contact pad (not shown), and the contact pad is in close contact with the brake during operation. As a brake, a hydraulic brake can be suitably used. The brake disc 190 has a circular disc shape and is arranged concentrically at the center of the small gear 170. The brake disc 190 is bolted to the shaft portion 171 and can be easily separated when necessary.

Figure 18 is a diagram showing the process of separating the large gear 180 from the hubless wheel 100B.

First, separate the brake disc 190 and the left side cover 161.

Next, the large gear 180 is separated from the rotating wheel 180. At this time, the large gear 180 is bolted to the rotating wheel 180, so the large gear 180 can be simply separated by simply unfastening the bolt. Therefore, it is possible to easily replace the worn large gear 180 with a new one.

3. Third embodiment of hubless wheel according to the present invention

FIG. 19 is a diagram showing the hubless wheel 100C of the third embodiment with some parts omitted, FIG. 20 is an exploded view of the hubless wheel 100C, and FIG. 21 is a cross-sectional view of the hubless wheel 100C. 22 is a view showing an exploded cross-sectional view of FIG. 21, and FIG. 23 is a view showing the fixed wheel 110 of the hubless wheel 100C.

The hubless wheel 100C of the third embodiment shown in FIGS. 19 to 23 is a wheel used in a bicycle and has a hubless structure. The hubless wheel (100C) of the third embodiment can be suitably used for electric bicycles, and can be suitably applied to the front and rear wheels of electric bicycles.

19 to 23, the hubless wheel 100C of the third embodiment includes a fixed wheel 110, a rotating wheel 120, and a bearing 130.

The fixed wheel 110 is fixedly mounted on a bicycle body frame (not shown). The fixed wheel 110 does not rotate because it is fixed to the bicycle body frame.

The rotating wheel 120 is rotatably disposed outside the fixed wheel 110. While the rotating wheel 120 is composed of a single body, the fixed wheel 110 is composed of two parts. That is, the fixed wheel 110 consists of a left part (110L) and a right part (110R). The left part (110L) and the right part (110R) are coupled to each other by a plurality of bolts provided on the sides. Compared to the hubless wheels 100A and 100B of the first and second embodiments described above, the hubless wheel 100C of the third embodiment has a rotating wheel 120 composed of a single body and a fixed wheel 110 of two bodies. The difference is that it is composed of two parts (110L, 110R).

The fixed wheel 110 and the rotating wheel 120 are made of metal, preferably aluminum.

The bearing 130 is disposed between the fixed wheel 110 and the rotating wheel 120. The bearing 130 consists of a ring-shaped bearing support body 131 and a plurality of bearing balls 132. The bearing 130 serves to rotatably support the rotating wheel 120.

21 to 23, a bearing ball contact groove 119 is formed on the outer peripheral surface of the fixed wheel 110. The bearing ball contact groove 119 is formed around the entire outer peripheral surface of the fixed wheel 1110. Additionally, a bearing ball contact groove 129 is formed on the inner peripheral surface of the rotating wheel 120. The bearing ball contact groove 129 is formed around the entire inner peripheral surface of the rotating wheel 120.

The bearing ball contact groove 119 of the fixed wheel 110 and the bearing ball contact groove 129 of the rotating wheel 120 are disposed opposite to each other. While the bicycle is running, the bearing ball 132 rotates while contacting the four bearing ball contact grooves 119 and 129.

Unlike the above-described first and second embodiments in which the bearing ball contact surface is formed in the form of a V-shaped or inverted V-shaped groove, in the third embodiment, it is formed in a rounded arc shape in cross section. Thus, in the first and second embodiments, the bearing ball contact surface and the bearing ball 132 make point contact, while in the third embodiment, the bearing ball contact grooves 119 and 129 and the bearing ball 132 ) comes into line contact.

In the case of the first and second embodiments in which the bearing ball contact surface and the bearing ball 132 make point contact, strong pressure is concentrated on the contact point on the bearing ball contact surface, causing wear on the bearing ball contact surface as usage time increases. This may cause problems that shorten the service life of parts. On the other hand, in the case of the third embodiment in which the bearing ball contact grooves 119 and 129 and the bearing ball 132 are in line contact, the pressure concentration is alleviated because the contact area is relatively large, so even if the usage time increases, the bearing ball Since wear does not occur in the contact groove 129, the service life of the component can be greatly increased. In addition, in the case of the third embodiment in which the bearing ball contact grooves 119 and 129 and the bearing ball 132 are in line contact, the pressure concentration is relatively relieved in the contact area and no wear occurs in the contact area. , it also has the advantage of greatly reducing the amount of noise generated compared to the first and second embodiments.

As described above, compared to the hubless wheels 100A and 100B of the first and second embodiments, the hubless wheel 100C of the third embodiment has a rotating wheel 120 composed of a single body and a fixed wheel 110. ) is different in that it consists of two parts (110L, 110R).

The hubless wheel 100C of the third embodiment has a structure in which the fixed wheel 110 is divided into two parts 110L and 110R, so assembly and disassembly of the wheel can be easily performed. Therefore, it is possible to easily and quickly perform the mounting and dismounting work of the tire 150 on the wheel 100C and the mounting and dismounting work of the bearing 130 on the wheel 100C.

100A: Hubless wheel (first embodiment)
100B: Hubless wheel (second embodiment)
100C: Hubless wheel (third embodiment)
110: fixed wheel
111, 112: Bearing ball contact surface
119: Bearing ball contact groove
110L: Left part
110R: Right part
120: Rotating wheel
125, 126: Bearing ball contact surface
120L: Left part
120R: Right part
121, 122: Combined groove
129: Bearing ball contact groove
130: bearing
131: Bearing ball support body
131a: Ball receiving hole
132: bearing ball
140: brake disc
150: tires
151, 152: coupling protrusion
160, 161, 162: Side cover
170: Small gear
180: Large gear
190: brake disc

Claims (4)

A fixed wheel 110 fixedly mounted on the bicycle body frame, a rotating wheel 120 rotatably disposed on the outside of the fixed wheel 110, and a fixed wheel 110 and a rotating wheel 120 disposed between the fixed wheel 110 and the rotating wheel 120. It includes a bearing 130, and the fixed wheel 110 is composed of a detachably coupled left part (110L) and a right part (110R), and the bearing 130 is only one ring-shaped body. A hubless wheel for a bicycle having a fixed wheel divided into two parts, consisting of a bearing support body (131) and a plurality of bearing balls (132).
In claim 1,
The bearing support body 131 is a hubless wheel for a bicycle having a fixed wheel divided into two parts through which a plurality of ball receiving holes 131a are formed.
In claim 2,
The bearing support 131 is not fixed and is divided into two parts that rotate along the rotary wheel 120 at a rotation speed less than the rotation speed of the rotary wheel 120 when the rotary wheel 120 rotates. Hubless wheels for bicycles with fixed wheels.
In claim 2,
An arc-shaped bearing ball contact groove 119 is formed on the outer peripheral surface of the fixed wheel 110, and an arc-shaped bearing ball contact groove 129 is formed on the inner peripheral surface of the rotating wheel 120. A hubless wheel for a bicycle with a fixed wheel divided into two parts.