KR20200071211A - Disk hub assembly for bicycle - Google Patents

Abstract

The present invention relates to a disc hub assembly for a bicycle. According to an embodiment of the present invention, a disc hub assembly for a bicycle comprises: a drum unit on which the rope is wound, and rotated with respect to a shaft according to unwinding of the rope; a wheel hub unit provided with a rim unit connected to the spoke of a wheel, and rotating by the rotational power of the drum unit; a disk which is connected to the wheel hub unit and is stopped by rotation of a caliper installed in a frame of a bicycle to stop rotation of the wheel; and an adapter installed on the rim unit of the wheel hub unit and providing a mounting space for the disk.

Description

Disk hub assembly for bicycle}

The present invention relates to a disc hub assembly for a bicycle, and more particularly, to a disc hub assembly used for a rope-type bicycle power generator.

A bicycle is a two-wheeled vehicle that moves by rotating the wheels with the driver's power, and the principle that power is provided using a chain is the basic form of a bicycle.

Specifically, when an external force is applied to the pedal by the driver, the pedal is rotated, and at the same time, a toothed chainring is rotated.

A chain is wound on the chainring at the same time as the sprocket on the rear wheel side, and the sprocket on the rear wheel side is rotated via the chain by rotation of the chainring, thereby driving the rear wheel.

Since the conventional chain-type bicycle as described above uses a structure called a chain, power is transmitted to a rear wheel that is a driving wheel, thereby causing various problems to a driver due to a chain.

For example, the oil required for smooth driving of the chain is likely to stain the driver's bottoms, and the chain may cause noise when used for a long time.

In order to improve this, a rope method rather than a chain method has been developed, but the conventional rope method power generating device has a problem in terms of generating driving force.

On the other hand, various types of low-bike brakes for braking a bicycle exist, for example, a rim brake, a band brake, and a disc brake are general bicycle brake devices. If the passenger wants a very high performance brake system, a disc brake system is generally required. However, the existing rope type power generating device has a limitation in the application of the disc brake due to its structural characteristics.

Registered Patent Publication No. 10-0367331 (Dec. 24, 2002)

The present invention is to solve the above problems, to increase the driving efficiency of the rope-type bicycle power generator, and to provide a disc hub assembly for a bicycle that can easily apply the disc brake to the power generator .

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

According to an embodiment of the present invention, the rope is wound, the drum unit being rotated with respect to the shaft according to the unwinding of the rope; A wheel hub unit provided with a rim connected to the spokes of the wheel and rotating by the rotational power of the drum unit; A disk that is connected to the wheel hub unit and is stopped by rotation of a caliper installed in a frame of a bicycle to stop rotation of the wheel; And an adapter installed on a rim of the wheel hub unit and providing a mounting space for the disc.

In addition, the adapter, the main body portion: extends inward from one side of the main body portion is supported on the rim portion, the mount portion is fastened to the disk; And a flange portion extending from the other side of the body portion in an outward direction and connected to the spokes of the wheel.

In addition, the adapter may have a form in which the inner circumferential surface of the body portion contacts the outer circumferential surface of the rim portion, and the inner surface of the mount portion contacts the side surface of the rim portion.

In addition, a screw fastening hole corresponding to a through hole formed in the disc and a spoke connecting hole formed in the rim portion may be formed in the mount portion.

On the other hand, according to another embodiment of the present invention, the rope is wound, the drum unit is rotated with respect to the shaft according to the unwinding of the rope; A wheel hub unit connected to the spokes of the wheel and rotating by the rotational power of the drum unit; A disk that is connected to the wheel hub unit and is stopped by rotation of a caliper installed in a frame of a bicycle to stop rotation of the wheel; And a fixing ring fixed to the wheel hub unit so as to fix the arrangement position of the power transmission parts built in the wheel hub unit and to press and fix the disc. A disc hub assembly for a bicycle is provided.

In addition, the wheel hub unit includes a hub body having a rim connected to the spokes of the wheel; A drive sleeve rotatably connected to the shaft to be embedded in the hub body, and fixed to a side of the drum unit; An intermediate sleeve installed in a space between the hub body and the drive sleeve, and connected via the drive sleeve and a free wheel; And it is fastened to the hub body, and includes a support ring for supporting the intermediate sleeve, the fixing ring may be configured to be screwed to the outer circumference of the support ring.

Also, a center hole defining an outer circumference of the support ring may be formed on the disk.

In addition, the disc hub assembly for bicycles includes a plurality of anti-rotation holes formed along the outer periphery of the center hole; And a plurality of anti-rotation protrusions formed to protrude from the side surface of the hub body and inserted into the anti-rotation hole.

In addition, the drum units are respectively installed at both ends of the wheel hub unit, and can be configured to operate alternately.

According to an embodiment of the present invention, there is an effect that can improve the driving efficiency of the power generating device through a mechanism in which the drum unit having a spiral spring is alternately driven.

In addition, the disk can be easily detached from the wheel hub unit using an adapter or a retaining ring, and there is an advantage in that a separate wheel hub unit for application of a disc brake is not required to be manufactured separately when the disc hub assembly is manufactured.

1 is a perspective view showing a configuration in which a rope-type power generating device according to the present invention is applied to a bicycle.
Figure 2 is a side view of the rope-type power generator shown in Figure 1;
3 to 6 are views showing an operating state of the rope-type power generating device of Figure 1;
7 is an exploded perspective view of a disc hub assembly according to an embodiment of the present invention.
8 is a schematic cross-sectional view of a disc hub assembly according to an embodiment of the present invention.
9 is a perspective view of the adapter shown in FIG. 7 viewed from the opposite direction.
10 is an exploded perspective view of a disc hub assembly according to another embodiment of the present invention.
11 is a cross-sectional view of a disc hub assembly according to another embodiment of the present invention.
12 is a view showing a configuration in which the rotation preventing portion is additionally provided in the disk hub assembly of FIG. 10.
13 is an exploded perspective view of a disc hub assembly according to another embodiment of the present invention.
14 is a schematic cross-sectional view of the disc hub assembly shown in FIG. 13;

The present invention can be applied to a variety of transformations and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention. In the description of the present invention, when it is determined that detailed descriptions of related well-known technologies may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “comprises” or “have” are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Hereinafter, the disk hub assembly for a bicycle according to the present invention will be described in detail with reference to the accompanying drawings, and in describing with reference to the accompanying drawings, identical or corresponding components are assigned the same reference numbers and overlapped therewith. The description will be omitted.

1 is a perspective view showing a configuration in which a rope-type power generating device related to the present invention is applied to a bicycle, and FIG. 2 is a side view of the rope-type power generating device shown in FIG. 1.

1 and 2, the rope-type power generator 10 related to the present invention includes a rope 100, a disc hub assembly 200, a rotating arm 300, a rope wheel 400, and the like.

The rope 100 may be made of a synthetic resin material (for example, polyamide fiber) having high strength and elasticity, and is connected between the rotating arm 300 and the disc hub assembly 220.

The disc hub assembly 200 includes a drum unit 210 (see FIG. 7) on which the rope 100 is wound, and a wheel hub unit 220 (see FIG. 7) on which the spokes of the bicycle wheel 12 are installed. For reference, the disc hub assembly 200 used in the present specification is based on a configuration in which a disc 230 (see FIG. 7) of a disc brake is mounted, but is referred to as a hub assembly when the disc 230 is not mounted. It is also possible.

The drum unit 210 is connected to the shaft A1 which is the rotation axis of the wheel 12, and is rotated in the forward direction R1 by unwinding the rope 100 that has been wound up.

The wheel hub unit 220 is coupled to the drum unit 210 and rotates by the rotational power of the drum unit 210. The rotational power of the drum unit 210 is transmitted to the wheel hub unit 220 so that the wheel 12 rotates in the forward direction R1 to advance the bicycle.

The drum unit 210 includes a spiral spring 215 (see FIG. 11 ), and when the drum unit 210 rotates in the forward direction R1, the spiral spring 215 elastically deforms to generate restoring force. Due to this elastic restoring force, the drum unit 210 rotates in the reverse direction R2, and thus the unwound rope 100 can be wound up again to the drum unit 210.

A free wheel that transmits power in one direction is installed inside the wheel hub unit 220. Accordingly, when rotating in the forward direction R1 of the drum unit 210, the rotating power of the drum unit 210 is rotated. However, when rotating in the reverse direction (R2) of the drum unit 210, the rotational power of the drum unit 210 is not transmitted to the wheel 12.

The rotary arm 300 rotates in the forward direction R1 and in the reverse direction R2 based on the rotational axis A2 spaced apart from the pedal axis within a predetermined angle range by rotation of the pedal mounted on the frame of the bicycle. It is configured to rotate repeatedly.

The rotating arm 300 includes a head arm 310, a driving arm 310 extending forward from the head arm 310, a traction arm 330 on which the rope wheel 400 is installed, and a driving arm 320 And a connecting arm 340 connecting the traction arm 330.

The head arm 310 is connected to the bicycle frame based on the pedal shaft and the rotating shaft A2 spaced apart. The driving arm 320 provides a driving path 322 of the driving wheel 500 that is rotated in association with rotation of the pedal. The traction arm 330 allows the rope wheel 400 to be mounted inside the rotating arm 300, and provides traction force to the rope 100 as the driving wheel 500 rotates. The connecting arm 340 is a driving arm It connects the 320 and the traction arm 330 and ensures robustness and load support.

The rotary arm 300 may be manufactured in a single plate shape, but may have a shape in which a pair of plates of the same shape are spaced apart by a predetermined distance for rigidity and cost reduction. Here, the distance between the plates is sufficient as long as the driving wheel 500 can be inserted and stably moved.

The driving wheel 500 is rotatably installed on the pedal and rotates in conjunction with the pedal by rotation of the pedal to transmit the rotational force of the pedal to the rotary arm 300. When the pedal rotates, the drive wheel 500 is inserted into the drive path 322 in the form of a groove or a hole to move along the drive path 322, and when the drive wheel 500 rotates 1, the rotary arm 300 Within a predetermined angular range, forward (R1) rotation and reverse (R2) rotation are repeatedly performed.

On the other hand, the rotation arm 300 may be provided with an anti-separation arm 350 to prevent the driving wheel 500 from finely leaving the driving path 322 when rotating in the reverse direction R2. The departure preventing arm 350 may have a shape extending from the head arm 310 toward the traction arm 330 in a predetermined length. The departure preventing arm 350 may have a groove or hole shape in which the driving wheel 500 is inserted, like the driving path 322.

The rope wheel 400 is installed on the traction arm 330 to support the rope 100, and moves forward when the rotating arm 300 rotates in the forward direction R1 (the rope that was wound around the drum unit 210) 100). When the rotating arm 300 is rotated in the reverse direction (R2), the rope wheel 400 is retracted so that the rope 100 is wound around the drum unit 210.

After the rope 100 is wound on the rope wheel 400, it may be wound on a balance wheel 600 fixed to the frame.

The rope type power generating device 10 related to the present invention may be located on both sides of the pedal, and the rope 12 of the power generating device 10 located on one side is rotated by the rotation of the pedal to advance the wheel 12 When moving forward, the rope wheel 400 of the power generating device 10 located on the opposite side is reversed, and by such an alternating operation, the bicycle can smoothly run without interruption of power.

3 to 6 are views showing an operating state of the rope-type power generator of FIG. 1.

3 to 6, when the driver rotates by applying force to the pedal, the drive wheel 500 rotates in association with the pedal, and in this process, the drive wheel 500 drives the drive path 320 of the drive arm 320 ), the rotating arm 300 rotates in the forward direction R1 within a predetermined angular range.

3 to 5, when the rotating arm 300 rotates in the forward direction (R1), the rope wheel 400 is advanced, and in this process, the rope 100 wound on the drum unit 210 is unwound. The drum unit 210 is rotated in the forward direction (R1). The rotational power of the drum unit 210 is transmitted to the wheel hub unit 220 so that the wheel 12 rotates, and accordingly, the bicycle travels forward.

If the pedal continues to rotate in the state of FIG. 5, it passes through the state as shown in FIG. 6 and becomes the state as shown in FIG. 3 again. At this time, the rotary arm 300 rotates in the reverse direction R2. When the rotating arm 300 rotates in the reverse direction R2, the rope wheel 400 is reversed, and the drum unit 210 is also reversed by the restoring force of the spiral spring 215 built in the drum unit 210. As it rotates, the rope 100 is wound around the drum unit 210. At this time, the reverse (R2) rotational power of the drum unit 210 is not transmitted to the wheel 12 due to the free wheel structure built in the wheel hub unit 210.

The bicycle will be driven by repetition of the above-described series of operations, and a description will be given below of a configuration in which a disk brake is applied to the rope-type power generating device 10 according to the present invention.

7 is an exploded perspective view of a disc hub assembly according to an embodiment of the present invention.

The disc hub assembly 200 according to the present embodiment includes a drum unit 210, a wheel hub unit 220, a disc 230 and an adapter 240.

In the drum unit 210, as described above, the rope 100 is wound, and for this purpose, a guide groove for guiding the winding of the rope 100 may be formed on its outer surface. The drum unit 210 is rotatably installed on the shaft A1 and is rotated with respect to the shaft A1 according to the unwinding of the rope 100. The drum unit 210 may be installed on both sides of the wheel hub unit 220, and alternately perform operations on both sides.

The wheel hub unit 220 is provided with a rim 270 connected to the spokes of the wheel 12, and rotates by receiving the rotational power of the drum unit 210. As the wheel hub unit 220 rotates, the wheel 12 integrally connected thereto rotates.

The disk 230 is connected to the wheel hub unit 220, and rotation is stopped by the operation of a caliper (not shown) installed in the frame of the bicycle, so that the rotation of the wheel 120 is stopped. The caliper is connected to the brake lever installed on the handle of the bicycle, and the caliper is operated by the operation of the brake lever, thereby limiting rotation of the disc 230 located between both stoppers of the caliper. The disk 230 is integrally fixed to the wheel hub unit 220, and when the rotation of the disk 230 is stopped, the rotation of the wheel 12 integrally connected to it is also stopped.

The adapter 240 is installed on the rim portion 270 of the wheel hub unit 220 and provides a mounting space for the disk 230. When using the adapter 240, there is an advantage that the disk 230 can be easily installed without changing the structure of the wheel hub unit 220. When removing the disk brake, only the adapter 240 is removed. There is an advantage that the brake can be easily attached and detached. In addition, when manufacturing the disc hub assembly 200, there is an advantage that there is no need to separately manufacture a dedicated wheel hub unit 220 for the application of the disc brake.

8 is a schematic cross-sectional view of a disc hub assembly according to an embodiment of the present invention, and FIG. 9 is a perspective view of the adapter shown in FIG. 7 viewed from the opposite direction.

8 and 9, the configuration of the adapter 240 will be described in more detail. The adapter 240 includes a body portion 241, a mount portion 242, and a flange portion 243.

The body portion 241 may be formed in a cylindrical shape, and is formed in a shape surrounding the rim portion 270 of the wheel hub unit 220.

The mount portion 242 has a shape extending from one side of the body portion 241 in an inner direction, and a center hole 247 through which the drive sleeve 223 of the wheel hub unit 220 penetrates is formed in the center. One surface of the mount portion 242 is supported by the rim portion 270 of the wheel hub unit 220, and the other side is supported by the disk 230.

The disk 230 is fastened to the rim portion 270 and the mount portion 280, and can be fastened using a fastening member such as, for example, a bolt (B). A screw fastening hole 245 corresponding to the through hole 235 formed in the disk 230 and the spoke connection hole 275 formed in the rim portion 270 may be formed in the mount portion. In this case, it is possible to form a female thread in the spoke connection hole 275 of the rim portion 270, or use a nut inside the rim portion 270 to fasten.

The flange portion 243 extends outward from the other side of the body portion 241, and is connected to a spoke of the wheel 12. The flange portion 243 replaces the function of the rim portion 270 when the disc 230 is installed, and a connection hole 246 for connecting the spokes may be formed.

The adapter 240 having such a configuration may have a form in which the inner circumferential surface of the main body portion 241 contacts the outer circumferential surface of the rim portion 270, and the inner surface of the mount portion 242 contacts the side surface of the rim portion 270, Through this configuration, the disk 230 can be firmly supported.

10 is an exploded perspective view of a disk hub assembly according to another embodiment of the present invention, and FIG. 11 is a cross-sectional view of a disk hub assembly according to another embodiment of the present invention.

The disc hub assembly 200' of this embodiment includes a drum unit 210, a wheel hub unit 220, a disc 230, and a retaining ring 250.

The drum unit 210, wheel hub unit 220, and disk 230 of this embodiment are the same as those of the previous embodiment, and in this embodiment, the configuration of the adapter 240 of the previous embodiment for fixing the disk 230 Fixing ring 250 was used without using.

The fixing ring 250 fixes the arrangement position of the power transmission parts 222 and 223 embedded in the wheel hub unit 220 and is fastened to the wheel hub unit 220 to press and fix the disk 230.

Referring to FIG. 11, the wheel hub unit 220 includes a hub body 221, a driving sleeve 222, an intermediate sleeve 223 and a support ring 224.

The hub body 221 constitutes the exterior of the wheel hub unit 220 and includes a rim 270 connected to the spokes of the wheel 12.

The driving sleeve 222 is rotatably connected to the shaft A1 so as to be embedded in the hub body 221, and is fixed to the side of the drum unit 210. For fixing the drive sleeve 222, a plurality of fixing holes 217 are formed on the side surface of the drum unit 210, and the driving sleeve 222 has a plurality of fixing pins 227 inserted into the fixing holes 217. Is formed. As the drum unit 210 rotates, the drive sleeve 222 also rotates therewith.

The intermediate sleeve 223 is installed in the space between the hub body 221 and the drive sleeve 222, and is connected through the drive sleeve 222 and the free wheel 260. The free wheel 260 is configured to transmit power only in one direction, and when the drum unit 210 rotates in the forward direction R1 as described above, power is applied from the drive sleeve 222 to the intermediate sleeve 223. However, when the drum unit 210 rotates in the reverse direction R2, power is not transmitted from the drive sleeve 222 to the intermediate sleeve 223.

The support ring 224 is fastened to the hub body 221 and is configured to support the intermediate sleeve 223. The hub body 221 rotates integrally with the intermediate sleeve 223 when the bicycle is traveling forward, but has a structure that rotates relative to the intermediate sleeve 223 in the reverse direction (R2) when the bicycle is driven backward. The support ring 224 is fixedly fastened to the hub body 221, and threads that are fastened to each other may be formed on the inner circumferential surface of the hub body 221 and the outer circumferential surface of the support ring 224. The support ring 224 is in frictional contact with the intermediate sleeve 223, and portions of the support ring 224 and the intermediate sleeve 223 that are in contact with each other may be configured to have a conical shape.

The fixing ring 250 is configured to be screwed to the outer circumference of the support ring 224, and parts disposed therein by fixing the position of the support ring 224, that is, the drive sleeve 222 and the intermediate sleeve 223 When assembling the back, the position is determined and then fixed in place.

The disk 230 is interposed between the hub body 221 and the fixing ring 250, and is pressed by the fixing ring 250 as the fixing ring 250 is fastened to be fixed to the hub body 221. A center hole 237 defining the outer circumference of the support ring 224 is formed on the disk 230, and the support ring 224 of the hub body 230 penetrates and inserts through the center hole 237 of the disk 230 do.

According to the present embodiment, the fixing ring 250 performs a function of fixing the arrangement position of the power transmission parts built in the wheel hub unit 220 and a function of fixing the disk 230, through which simple component configuration Through this, it is possible to implement a disk mounting structure. In addition, as in the previous embodiment, it is easy to attach and detach the disc 230, and there is an advantage in that it is not necessary to separately manufacture the applied wheel hub unit 220 for the application of the disc brake.

FIG. 12 is a view showing a configuration in which the rotation preventing part is additionally provided in the disk hub assembly of FIG. 10.

The disk hub assembly according to the present embodiment has a configuration in which the rotation preventing part for preventing rotation of the disk 230 is additionally provided in the configuration shown in FIG. 10.

The anti-rotation portion includes a plurality of anti-rotation holes 281 formed along the outer periphery of the center hole 237 of the disk 230, and an anti-rotation protrusion 282 formed to protrude from the side surface of the hub body 221. It may have a configuration to include. The anti-rotation protrusion 282 of the hub body 221 is inserted into the anti-rotation hole 281 of the disk 230 to limit the relative rotation of the disk 230.

Through the configuration of the rotation preventing portion, there is an advantage that the disk 230 can be more firmly fixed to the hub body 221.

13 is an exploded perspective view of a disc hub assembly according to another embodiment of the present invention, and FIG. 14 is a schematic cross-sectional view of the disc hub assembly shown in FIG. 13.

In FIGS. 13 and 14, the illustration of the disk 230 of the above-described embodiments and a structure for fixing it are omitted, but the disk 230 can be installed on the wheel hub unit 220 by selecting one of them, and the description is omitted. The configuration of the reference numerals is the same as that of the previous embodiment.

The disc hub assembly of the present embodiment is different from the previous embodiment in the configuration of the drum unit 210, and the drum unit 210 of the present embodiment includes a plurality of layers in which the rope 100 has a radial direction of the drum unit 210. Winding groove 211 is provided to be wound in a stacked manner. In this embodiment, a configuration in which two winding grooves 211 are provided for each drum unit 210 is illustrated.

A guide pattern 215 for guiding that the rope 100 is wound may be formed on the inner space of the winding groove 211, that is, the inner side wall of the drum unit 210. The guide pattern 215 has a shape corresponding to the outer shape of the rope 100, and can be formed in a shape corresponding to each other on opposite side walls of the drum unit 210 so as to guide both sides of the rope 100. .

In the case of the disc hub assembly of the previous embodiment, the rope 100 is wound along the axial direction of the drum unit 210, whereas in the case of this embodiment, the rope 100 is wound along the radial direction of the drum unit 210. By doing so, it is possible to reduce the width of the drum unit 210 as much as possible, thereby reducing the width of the entire disc hub assembly. Therefore, even if the disk brake is applied to the rope-type power generating device, there is an advantage that the width (thickness) of the power generating device can be realized slim.

The above has been described with reference to specific embodiments of the present invention, but those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that it can be modified and changed.

100: rope 200: disc hub assembly
210: drum unit 211: winding groove
215: guide pattern 220: wheel hub unit
230: disk 240: adapter
250: retaining ring 260: freewheel
300: rotating arm 400: rope wheel
500: drive wheel 600: balance wheel

Claims (9)

A drum unit in which the rope is wound and rotated with respect to the shaft according to unwinding of the rope;
A wheel hub unit provided with a rim connected to the spokes of the wheel and rotating by the rotational power of the drum unit;
A disk that is connected to the wheel hub unit and is stopped by rotation of a caliper installed in a frame of a bicycle to stop rotation of the wheel; And
Disc hub assembly for a bicycle that includes; is provided on the rim of the wheel hub unit, an adapter that provides a mounting space for the disc.
According to claim 1, The adapter,
Body:
A mount portion extending from one side of the main body portion to an inner side, supported by the rim portion, and coupled with the disc; And
Disc body assembly for a bicycle, characterized in that it comprises a flange portion extending from the other side of the main body in the outer direction and connected to the spokes of the wheel.
The method of claim 2, wherein the adapter,
The inner circumferential surface of the body portion contacts the outer circumferential surface of the rim portion,
Disc hub assembly for a bicycle, characterized in that the inner surface of the mount portion has a form in contact with the side surface of the rim portion.
According to claim 2,
A disk hub assembly for a bicycle, characterized in that a screw fastening hole corresponding to a through hole formed in the disk and a spoke connecting hole formed in the rim is formed in the mount part.
A drum unit in which the rope is wound and rotated with respect to the shaft according to unwinding of the rope;
A wheel hub unit connected to the spokes of the wheel and rotating by the rotational power of the drum unit;
A disk that is connected to the wheel hub unit and is stopped by rotation of a caliper installed in a frame of a bicycle to stop rotation of the wheel; And
And a fixing ring fixed to the wheel hub unit to fix the arrangement position of the power transmission parts built in the wheel hub unit and to press and fix the disc.
The method of claim 5, wherein the wheel hub unit,
A hub body having a rim connected to the spokes of the wheel;
A drive sleeve rotatably connected to the shaft to be embedded in the hub body, and fixed to a side of the drum unit;
An intermediate sleeve installed in a space between the hub body and the drive sleeve, and connected via the drive sleeve and a free wheel; And
It is fastened to the hub body, and includes a support ring for supporting the intermediate sleeve,
The fixing ring is a disc hub assembly for a bicycle, characterized in that configured to be screwed to the outer circumference of the support ring.
The method of claim 6,
Disc disk hub assembly for the bicycle, characterized in that a center hole is formed to define the outer circumference of the support ring.
The method of claim 7,
A plurality of anti-rotation holes formed along the outer periphery of the center hole; And
Disc hub assembly for a bicycle characterized in that it is formed to protrude from the side of the hub body, a plurality of anti-rotation projections inserted into the anti-rotation hole.
The method according to claim 1 or 5,
The drum unit is installed on both ends of the wheel hub unit, the disc hub assembly for bicycles, characterized in that configured to operate alternately with each other.

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